| electrophoretic karyotype of intracellular yeast-like symbiotes in rice planthoppers and anobiid beetles. | chromosomal dna molecules of intracellular yeast-like symbiotes (yls) of three species of rice planthoppers and two species of anobiid beetles have been separated by pulsed-field gel electrophoresis. probable chromosome numbers of nilaparvata lugens, sogatella furcifera, and laodelphax striatellus, were 4, 4, and 5, respectively, and tentative genome sizes were 17.3, 17.6, and 20.1 mbp, respectively, based upon migration of individual chromosome-sized dna relative to the size standards of schizo ... | 1995 | 7722339 |
| phylogenetic position of yeast-like symbiotes of rice planthoppers based on partial 18s rdna sequences. | the rice planthoppers, nilaparvata lugens, sogatella furcifera, and laodelphax striatellus, harbor intracellular yeast-like symbiotes (yls) in the fat body. the yls are obligated endosymbiotes and are transovarially inherited. nucleotide sequences of the 18s rrna genes from the yls were analyzed by direct sequencing. the yls of the three species of planthoppers were monophyletic and their taxonomic positions were in the class pyrenomycetes in the subphylum ascomycotina. | 1995 | 7787846 |
| nonpathogenic nilaparvata lugens reovirus is transmitted to the brown planthopper through rice plant. | nilaparvata lugens reovirus (nlrv) was found in a colony of the brown planthopper, n. lugens, an important plant virus vector. unlike with usual phytopathogenic reoviruses, there are no visible symptoms on a rice plant which has been attacked by nlrv-infected planthoppers. manner of transmission, host range, and multiplication of nlrv in rice plant were studied by enzyme-linked immunosorbent assay or polymerase chain reaction using reverse transcriptase. nlrv was transovumly transmitted to about ... | 1995 | 7871743 |
| infection density of wolbachia and incompatibility level in two planthopper species, laodelphax striatellus and sogatella furcifera. | wolbachia, a bacterial endosymbiote of arthropods, causes cytoplasmic incompatibility (ci) in many insect species. ci traits were studied in two planthopper species, laodelphax striatellus and sogatella furcifera, and wolbachia densities in these planthopper species were calculated by quantitative pcr methods. the ci level of l. striatellus was quite high and even aged males strongly caused ci. in contrast, s. furcifera showed partial ci, and males lost their ability to cause ci with age. wolbac ... | 2001 | 11267910 |
| insect symbiosis: derivation of yeast-like endosymbionts within an entomopathogenic filamentous lineage. | yeast-like endosymbionts (ylss) of insects often are restricted to specific hosts and are essential to the host's survival. for example, in planthoppers (homoptera: delphacidae), endosymbionts function in sterol utilization and nitrogen recycling for the hosts. our study, designed to investigate evolutionary changes in the yls lineage involved in the planthopper association, strongly suggests an origin of the ylss from within the filamentous ascomycetes (euascomycetes), not the true yeasts (sacc ... | 2001 | 11371588 |
| wolbachia infection shared among planthoppers (homoptera: delphacidae) and their endoparasite (strepsiptera: elenchidae): a probable case of interspecies transmission. | wolbachia, a group of parasitic bacteria of arthropods, are believed to be horizontally transmitted among arthropod taxa. we present a new probable example of interspecies horizontal transmission of wolbachia by way of an endoparasite based on the conformity of wolbachia gene sequences. field samples of two rice planthoppers, laodelphax striatellus and sogatella furcifera possessed identical wolbachia. among three major endoparasites of planthoppers, a strepsipteran, elenchus japonicus, harboure ... | 2001 | 11555254 |
| [insecticide resistance of different populations of white-backed planthopper, sogatella furcifera (horváth) (homoptera:delphacidae)]. | resistance to some insecticides used commonly in different populations of the white-backed planthopper, sogatella furcifera collected from zhejiang, guangxi, yunnan and hainan province in china was measured. the specific activities of some resistance-associated enzymes, i.e. esterase, carboxylesterase, glutathione s-transferase and acetylcholinesterase from these populations were also measured. the resistant levels to malathion, methamidophos, isoprocarb and buprofezin were markedly higher in yu ... | 2002 | 11962304 |
| two whitebacked planthopper resistance genes in rice share the same loci with those for brown planthopper resistance. | the whitebacked planthopper (wbph), sogatella furcifera, and brown planthopper (bph) nilaparvata lugens stål are important sucking insects of rice (oryza sativa l.) crops throughout the world. rice 'b5', which has derived its resistance genes from the wild rice o. officinalis wall ex watt, is a line that is highly resistant to both wbph and bph. previously, two resistance genes against bph, qbp1, and qbp2 in 'b5' had been mapped onto chromosome 3 and chromosome 4, respectively. in this study, we ... | 2004 | 14666132 |
| [adaptation of sogatella furcifera to insect-resistant rice variety n22]. | the adaptation of whitebacked planthopper (wbph) sogatella furcifera to insect-resistant rice variety n22 and the variation of its protective enzyme were studied by rearing it successively two generations on n22 and insect-susceptible rice variety tn1 in laboratory. the results showed that after reared on tn1 or n22 for one or two generations, its egg period, nymphal duration, and total generation period had no significant difference. the ecological parameters, e.g., nymphal survival rate, body ... | 2003 | 14997651 |
| transgenic rice plants expressing the snowdrop lectin gene (gna) exhibit high-level resistance to the whitebacked planthopper (sogatella furcifera). | transgenic rice plants, expressing snowdrop lectin [galanthus nivalis agglutinin (gna)], obtained by agrobacterium-mediated genetic transformation, were evaluated for resistance against the insect, the whitebacked planthopper (wbph). the transgene gna was driven by the phloem-specific, rice-sucrose synthase promoter rss1, and the bar was driven by the camv 35s promoter. in our previous study, the transgenic status of these lines was confirmed by southern, northern and western blot analyses. both ... | 2004 | 15252708 |
| [sustainable rice pest management and its economic benefits]. | with rice varieties jiahua 1 (resistant to the white backed plant hopper sogatella furcifera) and shanyou 63 (susceptible) as test materials, this paper studied the effects of different insecticide treatments on the pest population and quality and yield of rice grain, and evaluated their actual economic benefits (aeb). the results indicated that in the control plot, the peak density of s. furcifera on jiahua 1 was only 1/10 of that on shanyou 63. throughout the whole rice growth period, the s. f ... | 2006 | 17209398 |
| role of hydroperoxide lyase in white-backed planthopper (sogatella furcifera horváth)-induced resistance to bacterial blight in rice, oryza sativa l. | a pre-infestation of the white-backed planthopper (wbph), sogatella furcifera horváth, conferred resistance to bacterial blight caused by xanthomonas oryzae pv. oryzae (xoo) in rice (oryza sativa l.) under both laboratory and field conditions. the infestation of another planthopper species, the brown planthopper (bph) nilaparvata lugens stål, did not significantly reduce the incidence of bacterial blight symptoms. a large-scale screening using a rice dna microarray and quantitative rt-pcr reveal ... | 2010 | 19891707 |
| genetic diversity of the planthopper, sogatella furcifera in the greater mekong subregion detected by inter-simple sequence repeats (issr) markers. | the white backed planthopper, sogatella furcifera (hemiptera: delphacidae), is a serious pest of rice in asia. in the present study, inter-simple sequence repeat (issr) markers were employed to investigate the genetic diversity and differentiation of 47 populations sampled from 14 prefectures of the greater mekong subregion. a total of 14 selected primers yielded 121 bright and discernible bands, with an average of 8.6 bands per primer. according to the hierarchical analysis of molecular varianc ... | 2010 | 20569129 |
| permanent genetic resources added to molecular ecology resources database 1 january 2009-30 april 2009. | this article documents the addition of 283 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: agalinis acuta; ambrosia artemisiifolia; berula erecta; casuarius casuarius; cercospora zeae-maydis; chorthippus parallelus; conyza canadensis; cotesia sesamiae; epinephelus acanthistius; ficedula hypoleuca; grindelia hirsutula; guadua angustifolia; leucadendron rubrum; maritrema novaezealandensis; meretrix meretrix; nilaparvata lugens; ... | 2009 | 21564911 |
| reverse transcription loop-mediated isothermal amplification of rna for sensitive and rapid detection of southern rice black-streaked dwarf virus. | southern rice black-streaked dwarf virus (srbsdv) causes one of the most serious viral diseases of rice in southeast asia. a reverse transcription loop-mediated isothermal amplification (rt-lamp) assay was developed for detection of srbsdv using total rna extracted from rice tissues and the insect pest, white-backed planthopper. the assay was based on a set of four primers matching a total of six sequences in the s9 region of srbsdv genome. presence of the virus could be detected in rt-lamp reac ... | 2011 | 22227615 |
| expression of cytoplasmic incompatibility and host fitness effects in field populations of sogatella furcifera infected with cardinium. | 'candidatus cardinium' is a maternally inherited intracellular bacterium that infects a wide range of arthropods and causes diverse reproductive alterations of its arthropod hosts, including cytoplasmic incompatibility (ci), parthenogenesis and feminization. ci is the most common effect and is expressed as a reduction in the number of offspring in crosses between infected males and uninfected females (or females infected with a different bacterial strain). the white-backed planthopper sogatella ... | 2012 | 23356082 |
| genomic insights into the glutathione s-transferase gene family of two rice planthoppers, nilaparvata lugens (stål) and sogatella furcifera (horváth) (hemiptera: delphacidae). | glutathione s-transferase (gst) genes control crucial traits for the metabolism of various toxins encountered by insects in host plants and the wider environment, including insecticides. the planthoppers nilaparvata lugens and sogatella furcifera are serious specialist pests of rice throughout eastern asia. their capacity to rapidly adapt to resistant rice varieties and to develop resistance to various insecticides has led to severe outbreaks over the last decade. | 2013 | 23457591 |
| molecular characterization and differential expression of an olfactory receptor gene family in the white-backed planthopper sogatella furcifera based on transcriptome analysis. | the white-backed planthopper, sogatella furcifera, a notorious rice pest in asia, employs host plant volatiles as cues for host location. in insects, odor detection is mediated by two types of olfactory receptors: odorant receptors (ors) and ionotropic receptors (irs). in this study, we identified 63 sfurors and 14 sfurirs in s. furcifera based on sequences obtained from the head transcriptome and bioinformatics analysis. the motif-pattern of 130 hemiptera ors indicated an apparent differentiati ... | 2015 | 26540266 |
| rnai knockdown of acetyl-coa carboxylase gene eliminates jinggangmycin-enhanced reproduction and population growth in the brown planthopper, nilaparvata lugens. | a major challenge in ecology lies in understanding the coexistence of intraguild species, well documented at the organismal level, but not at the molecular level. this study focused on the effects of the antibiotic, jinggangmycin (jgm), a fungicide widely used in asian rice agroecosystems, on reproduction of insects within the planthopper guild, including the brown planthopper (bph) nilaparvata lugens and the white-backed planthopper (wbph) sogatella furcifera, both serious resurgence rice pests ... | 2015 | 26482193 |
| rna interference depletion of the halloween gene disembodied implies its potential application for management of planthopper sogatella furcifera and laodelphax striatellus. | sogatella furcifera and laodelphax striatellus are economically important rice pests in china by acting as vectors of several rice viruses, sucking the phloem sap and blocking the phloem vessels. ecdysteroid hormone 20-hydroxyecdysone regulates insect development and reproduction. a cytochrome p450 monooxygenase cyp302a1 (22-hydroxylase), encoded by the halloween gene disembodied (dib), plays a critical role in ecdysteroidogenesis. the objective of this study is to test whether dib genes are pot ... | 2014 | 24489765 |
| transcriptomic and expression analysis of the salivary glands in white-backed planthoppers, sogatella furcifera. | the white-backed planthopper (wbph), sogatella furcifera (horváth), is one of the serious rice pests because of its destructive feeding. the salivary glands of the wbph play an important role in the feeding behaviour. currently, however, very little is known about the salivary glands at the molecular level. we sequenced the salivary gland transcriptome (sialotranscripome) of adult wbphs using the illumina sequencing. a total of 65,595 transcripts and 51,842 unigenes were obtained from salivary g ... | 2016 | 27414796 |
| transcriptome and comparative gene expression analysis of sogatella furcifera (horváth) in response to southern rice black-streaked dwarf virus. | the white backed planthopper (wbph), sogatella furcifera (horváth), causes great damage to many crops by direct feeding or transmitting plant viruses. southern rice black-streaked dwarf virus (srbsdv), transmitted by wbph, has become a great threat to rice production in east asia. | 2012 | 22558400 |
| understanding the immune system architecture and transcriptome responses to southern rice black-streaked dwarf virus in sogatella furcifera. | sogatella furcifera, the white-backed planthopper (wbph), has become one of the most destructive pests in rice production owing to its plant sap-sucking behavior and efficient transmission of southern rice black-streaked dwarf virus (srbsdv) in a circulative, propagative and persistent manner. the dynamic and complex srbsdv-wbph-rice plant interaction is still poorly understood. in this study, based on a homology-based genome-wide analysis, 348 immune-related genes belonging to 28 families were ... | 2016 | 27805032 |
| analysis of sogatella furcifera proteome that interact with p10 protein of southern rice black-streaked dwarf virus. | southern rice black-streaked dwarf virus (srbsdv) is transmitted efficiently only by white-backed planthopper (wbph, sogatella furcifera) in a persistent propagative manner. here we used a yeast two-hybrid system to investigate the interactions between the srbsdv- p10 and the cdna library of wbph. of 130 proteins identified as putative interactors, 28 were further tested in a retransformation analysis and β-galactosidase assay to confirm the interaction. the full-length gene sequences of 5 candi ... | 2016 | 27653366 |
| single and fused transgenic bacillus thuringiensis rice alter the species-specific responses of non-target planthoppers to elevated carbon dioxide and temperature. | the approval of transgenic bacillus thuringiensis (bt) rice by china was momentous for biotech crops, although it has yet to be approved for commercial production. non-target pest problems in rice paddies, such as the three ecologically similar species of planthoppers nilaparvata lugens, laodelphax striatellus and sogatella furcifera, could become increasingly serious under global climate change. fused (cry1ab/cry1ac) and single (cry1ab) transgenic bt rice were evaluated for effects on species-s ... | 2014 | 24136625 |
| identification of himetobi p virus in the small brown planthopper by deep sequencing and assembly of virus-derived small interfering rnas. | profiling and assembly of virus-derived small interfering rnas (sirnas) using next-generation sequencing technologies have been very useful for identification and diagnosis of a number of plant and invertebrate viruses. in this work, we have conducted high-throughput pyrosequencing and bioinformatic analysis of the small brown planthopper (sbph, laodelphax striatellus), and these analyses unexpectedly showed that the himetobi p virus (hipv) was present in our laboratory cultures. hipv was also f ... | 2014 | 24239755 |
| the influence of sogatella furcifera (hemiptera: delphacidae) migratory events on the southern rice black-streaked dwarf virus epidemics. | southern rice black-streaked dwarf virus (srbsdv) caused serious rice losses. after the first outbreak in 2009 in northern vietnam and southern china, the virus ravaged crops again on enormous scales in 2010, but infections have decreased sharply since 2011. we presumed that the sudden epidemics and fadeout of srbsdv would be closely related to the migratory events of the insect vector, sogatella furcifera. this study sought the source area of srbsdv using the trajectory analysis method, and rev ... | 2017 | 28334380 |
| virus altered rice attractiveness to planthoppers is mediated by volatiles and related to virus titre and expression of defence and volatile-biosynthesis genes. | viruses may induce changes in plant hosts and vectors to enhance their transmission. the white-backed planthopper (wbph) and brown planthopper (bph) are vectors of southern rice black-streaked dwarf virus (srbsdv) and rice ragged stunt virus (rrsv), respectively, which cause serious rice diseases. we herein describe the effects of srbsdv and rrsv infections on host-selection behaviour of vector and non-vector planthoppers at different disease stages. the y-tube olfactometer choice and free-choic ... | 2016 | 27924841 |
| the speed of tubule formation of two fijiviruses corresponds with their dissemination efficiency in their insect vectors. | rice black-streaked dwarf virus (rbsdv) and southern rice black-streaked dwarf virus (srbsdv) are two closely related fijiviruses transmitted by the small brown planthopper (sbph) and white-backed planthopper (wbph), respectively. srbsdv has a latent period 4 days shorter than that of rbsdv, implying a more efficient spread in insect vector. currently, the mechanisms underlying this higher efficiency are poorly understood. however, our recent studies have implicated a role of virus induced tubul ... | 2016 | 27760544 |
| asymmetric spread of srbsdv between rice and corn plants by the vector sogatella furcifera (hemiptera: delphacidae). | plant viruses are mostly transmitted by sucking insects via their piercing behaviors, which may differ due to host plant species and their developmental stages. we characterized the transmission of a fijivirus, southern rice black-streaked dwarf virus (srbsdv), by the planthopper vector sogatella furcifera horváth (hemiptera: delphacidae), between rice and corn plants of varying developmental stages. srbsdv was transmitted from infected rice to uninfected corn plants as efficiently as its transm ... | 2016 | 27760223 |
| tolerance and responsive gene expression of sogatella furcifera under extreme temperature stresses are altered by its vectored plant virus. | southern rice black-streaked dwarf virus (srbsdv), a newly emerged fijivirus causing great loss to rice production in eastern and southeastern asian countries in recent years, is efficiently transmitted by a rice pest, white-backed planthopper (wbph, sogatella furcifera) in a persistent, circulative propagative manner and can be considered as an insect virus. in this study, srbsdv infection in wbph was found to increase the vector's death rate under extreme cold stress but improve its survival r ... | 2016 | 27531640 |
| epg recordings reveal differential feeding behaviors in sogatella furcifera in response to plant virus infection and transmission success. | plant viruses are primarily transmitted by insect vectors and virus infection may influence on the vectors' feeding behaviors. using an electrical penetration graph, we detected that infection with the southern rice black-streaked dwarf virus (srbsdv) in the white-backed planthopper (wbph) and in rice plants both altered the vector's feeding behavior. when viruliferous wbph (carrying srbsdv) were fed on uninfected plants, they spent more time in salivation and phloem sap ingestion than non-virul ... | 2016 | 27492995 |
| identification and characterization of micrornas in the white-backed planthopper, sogatella furcifera. | micrornas (mirnas) are a novel class of small, non-coding endogenous rnas that play critical regulatory roles in many metabolic activities in eukaryotes. reports of the identification of mirnas in sogatella furcifera (white-backed planthopper), the insect that acts as the only confirmed vector of the southern rice black-streaked dwarf virus (srbsdv), are limited. in this study, a total of 382 mirnas were identified in s. furcifera, including 106 conserved and 276 novel mirnas, using high-through ... | 2016 | 27060479 |
| reference gene selection and evaluation for gene expression studies using qrt-pcr in the white-backed planthopper, sogatella furcifera (hemiptera: delphacidae). | the white-backed planthopper, sogatella furcifera (hemiptera, delphacidae), is one of the most devastating rice pests. for a better control strategy, various genetic studies have been conducted using reverse-transcription quantitative real-time polymerase chain reaction (qrt-pcr). the appropriate application of qrt-pcr requires reliable endogenous controls; however, studies on this aspect of the white-backed planthopper are lacking. in the present study, nine commonly used reference genes, elong ... | 2016 | 26612891 |
| relation between the viral load accumulation of southern rice black-streaked dwarf virus and the different developmental stages of sogatella furcifera (hemiptera: delphacidae). | the white-backed planthopper, sogatella furcifera (horvath), is currently the only confirmed vector of southern rice black-streaked dwarf virus (srbsdv), which causes severe rice production losses in china. in this study, an absolute quantification qpcr method was used to detect viral gene mrna expression levels at different developmental stages of white-backed planthoppers fed srbsdv-infected rice plants. a comparison of viral copy numbers of the srbsdv s10 gene at the same developmental stage ... | 2015 | 26470211 |
| low temperature storage of southern rice black-streaked dwarf virus-infected rice plants cannot sustain virus transmission by the vector. | southern rice black-streaked dwarf virus (srbsdv) is a novel virus transmitted by white-backed planthopper sogatella furcifera (hováth) (hemiptera: delphacidae). due to low virus transmission efficiency by the planthopper, researchers are frequently confronted with shortage of viruliferous vectors or infected rice plants, especially in winter and the following spring. to find new ways to maintain virus-infected materials, viral rice plants were stored at -80°c for 45 or 140 d and evaluated as vi ... | 2016 | 26405060 |
| interactive effects of southern rice black-streaked dwarf virus infection of host plant and vector on performance of the vector, sogatella furcifera (homoptera: delphacidae). | performance of insect vectors can be influenced by the viruses they transmit, either directly by infection of the vectors or indirectly via infection of the host plants. southern rice black-streaked dwarf virus (srbsdv) is a propagative virus transmitted by the white-backed planthopper, sogatella furcifera (hovath). to elucidate the influence of srbsdv on the performance of white-backed planthopper, life parameters of viruliferous and nonviruliferous white-backed planthopper fed rice seedlings i ... | 2014 | 26309259 |
| quantification of southern rice black streaked dwarf virus and rice black streaked dwarf virus in the organs of their vector and nonvector insect over time. | southern rice black streaked dwarf virus (srbsdv) and rice black streaked dwarf virus (rbsdv) are serious rice-infecting reoviruses, which are transmitted by different planthoppers in a persistent propagative manner. in this study, we quantitatively compared the spatial distribution of srbsdv and rbsdv contents over time in their vector and nonvector insects using real time-pcr. genome equivalent copies (gec) were assessed every 2 days from 0 to 14 days after a 3-days acquisition access period ( ... | 2015 | 26116274 |
| quantitative analysis of southern rice black-streaked dwarf virus in sogatella furcifera and virus threshold for transmission. | we investigated southern rice black-streaked dwarf virus (srbsdv) accumulation in a vector insect, the whitebacked planthopper (sogatella furcifera), to elucidate the association of virus accumulation in the vector with virus transmission efficiency. real-time quantitative reverse transcription polymerase chain reaction analysis confirmed that this virus is transmitted in a persistent-propagative manner. srbsdv was successfully transmitted by s. furcifera males in which rna accumulation of the c ... | 2015 | 25870927 |
| virus-induced tubule: a vehicle for rapid spread of virions through basal lamina from midgut epithelium in the insect vector. | the plant reoviruses, plant rhabdoviruses, tospoviruses, and tenuiviruses are transmitted by insect vectors in a persistent propagative manner. these viruses induce the formation of viral inclusions to facilitate viral propagation in insect vectors. the intestines of insect vectors are formed by epithelial cells that lie on the noncellular basal lamina surrounded by visceral muscle tissue. here, we demonstrate that a recently identified plant reovirus, southern rice black-streaked dwarf virus (s ... | 2014 | 24965461 |
| synergism between southern rice black-streaked dwarf virus and rice ragged stunt virus enhances their insect vector acquisition. | southern rice black-streaked dwarf virus (srbsdv), a tentative species in the genus fijivirus, family reoviridae, is a novel rice virus transmitted by the white-backed planthopper (sogatella furcifera). since its discovery in 2001, srbsdv has spread rapidly throughout eastern and southeastern asia and caused large rice losses in china and vietnam. rice ragged stunt virus (rrsv) (genus oryzavirus, family reoviridae) is a common rice virus vectored by the brown planthopper (nilaparvata lugens). rr ... | 2014 | 24915431 |
| southern rice black-streaked dwarf virus infection improves host suitability for its insect vector, sogatella furcifera (hemiptera: delphacidae). | the impact of southern rice black-streaked dwarf virus (srbsdv) on the life cycle of the vector sogatella furcifera (horváth) (hemiptera: delphacidae) was investigated. the adult longevity was significantly shorter when the insect was reared on the srbsdv-infected rice plants than those reared on the noninfected rice treatment. the fecundity of s. furcifera reared on the srbsdv-infected rice plants was slightly higher than that of those reared on the noninfected rice plants both in macropterous ... | 2014 | 24665689 |
| southern rice black-streaked dwarf virus (srbsdv) directly affects the feeding and reproduction behavior of its vector, sogatella furcifera (horváth) (hemiptera: delphacidae). | southern rice black-streaked dwarf virus (srbsdv) is a recently discovered member of the genus fijivirus and it is transmitted by the rice whitebacked planthopper (wbph), sogatella furcifera (horváth). it was found that srbsdv infected vectors might contribute negatively to the wbph population, although the longer nymphal period might benefit viral acquisition, transmission and increase infection rate. the interaction between srbsdv and its vector need to be further explored to gain better under ... | 2014 | 24661747 |
| proteomic analysis of interaction between p7-1 of southern rice black-streaked dwarf virus and the insect vector reveals diverse insect proteins involved in successful transmission. | southern rice black-streaked dwarf virus (srbsdv), transmitted by the white-backed planthopper (sogatella furcifera) in a persistent-propagative manner, has caused serious yield losses in asia. here in a yeast two-hybrid system, protein interactions between srbsdv p7-1 as a bait protein and a cdna library of s. furcifera as prey protein were assessed. of 153 proteins identified as putative interactors, 24 were selected for further analysis. of the 24 proteins, 18 were further confirmed in a chem ... | 2014 | 24650428 |
| migration of rice planthoppers and their vectored re-emerging and novel rice viruses in east asia. | this review examines recent studies of the migration of three rice planthoppers, laodelphax striatellus, sogatella furcifera, and nilaparvata lugens, in east asia. laodelphax striatellus has recently broken out in jiangsu province, eastern china. the population density in the province started to increase in the early 2000s and peaked in 2004. in 2005, rice stripe virus (rsv) viruliferous rate of l. striatellus peaked at 31.3%. since then, rice stripe disease spread severely across the whole prov ... | 2013 | 24312081 |
| southern rice black-streaked dwarf virus: a white-backed planthopper-transmitted fijivirus threatening rice production in asia. | southern rice black-streaked dwarf virus (srbsdv), a non-enveloped icosahedral virus with a genome of 10 double-stranded rna segments, is a novel species in the genus fijivirus (family reoviridae) first recognized in 2008. rice plants infected with this virus exhibit symptoms similar to those caused by rice black-streaked dwarf virus. since 2009, the virus has rapidly spread and caused serious rice losses in east and southeast asia. significant progress has been made in recent years in understan ... | 2013 | 24058362 |
| southern rice black-streaked dwarf virus alters insect vectors' host orientation preferences to enhance spread and increase rice ragged stunt virus co-infection. | in recent years, southern rice black-streaked dwarf virus (srbsdv), a tentative species in the genus fijivirus (family reoviridae), has spread rapidly and caused serious rice losses in eastern and southeastern asia. with this virus spread, rice ragged stunt virus (rrsv, genus oryzavirus, family reoviridae) became more common in southern china, usually in co-infection with the former. srbsdv and rrsv are transmitted by two different species of planthoppers, white-backed planthopper (wbph, sogatel ... | 2014 | 24047253 |
| effects of southern rice black-streaked dwarf virus on the development and fecundity of its vector, sogatella furcifera. | southern rice black-streaked dwarf virus (srbsdv) threatens rice production in china and vietnam. the virus is vectored by the migrating white-backed planthopper (wbph, sogatella furcifera) in a circulative, propagative, and persistent manner. a persistently-transmitted plant virus might affect its vector's development and fecundity directly by infecting the vector itself and/or indirectly altering the host plant. this study evaluated the direct and indirect effects of srbsdv on wbph performance ... | 2013 | 23663428 |
| quantitative detection of relative expression levels of the whole genome of southern rice black-streaked dwarf virus and its replication in different hosts. | in recent years, a disease caused by southern rice black-streaked dwarf virus (srbsdv) has resulted in significant loss in rice production in southern china and has spread quickly throughout east and southeast asia. this virus is transmitted by an insect vector, white-backed planthopper (wbph) sogatella furcifera (hemiptera: delphacidae), in a persistent propagative manner. aside from rice, srbsdv can also infect numerous poaceae plants. however, the molecular mechanism of interaction between sr ... | 2013 | 23631705 |
| new model for the genesis and maturation of viroplasms induced by fijiviruses in insect vector cells. | plant reoviruses are thought to replicate and assemble within cytoplasmic, nonmembranous structures called viroplasms. here, we established continuous cell cultures of the white-backed planthopper (sogatella furcifera horváth) to investigate the mechanisms for the genesis and maturation of the viroplasm induced by southern rice black-streaked dwarf virus (srbsdv), a fijivirus in the family reoviridae, during infection of its insect vector. electron and confocal microscopy revealed that the virop ... | 2013 | 23576499 |
| dynamics of southern rice black-streaked dwarf virus in rice and implication for virus acquisition. | a novel viral disease of rice caused by southern rice black-streaked dwarf virus (srbsdv) has spread throughout east and southeast asia since the mid-2000s. outbreaks of this viral disease occur yearly in southern parts of japan concurrently with overseas migration of the planthopper vector sogatella furcifera from southern china during the rainy season (from late june to early july). we examined the dynamics (changes in titer and localization) of srbsdv on rice using reverse-transcription real- ... | 2013 | 23301813 |
| restriction of viral dissemination from the midgut determines incompetence of small brown planthopper as a vector of southern rice black-streaked dwarf virus. | southern rice black-streaked dwarf virus (srbsdv), a fijivirus, is transmitted by the white-backed planthopper in a persistent-propagative manner. in this study, we found that another planthopper species, the small brown planthopper (sbph), could acquire srbsdv but not transmit it. to identify the transmission barrier for srbsdv in sbphs, sequential infection by srbsdv in the organs of sbphs was studied with immunofluorescence for viral antigens. srbsdv initially entered the epithelial cells of ... | 2012 | 22683297 |
| development of an insect vector cell culture and rna interference system to investigate the functional role of fijivirus replication protein. | an in vitro culture system of primary cells from white-backed planthopper, an insect vector of southern rice black-streaked dwarf virus (srbsdv), a fijivirus, was established to study replication of the virus. viroplasms, putative sites of viral replication, contained the nonstructural viral protein p9-1, viral rna, outer-capsid proteins, and viral particles in virus-infected cultured insect vector cells, as revealed by transmission electron and confocal microscopy. formation of viroplasm-like s ... | 2012 | 22398296 |
| knockdown of nadph-cytochrome p450 reductase results in reduced resistance to buprofezin in the small brown planthopper, laodelphax striatellus (fallén). | nadph-cytochrome p450 reductase (cpr) plays an important role in cytochrome p450 function, and cpr knockdown in several insects leads to increased susceptibility to insecticides. however, a putative cpr gene has not yet been fully characterized in the small brown planthopper laodelphax striatellus, a notorious agricultural pest in rice that causes serious damage by transmitting rice stripe and rice black-streaked dwarf viruses. the objective of this study was to clone the cdna and to knock down ... | 2016 | 26821654 |
| effects of host sex, plant species, and putative host species on the prevalence of wolbachia in natural populations of bemisia tabaci (hemiptera: aleyrodidae): a modified nested pcr study. | bemisia tabaci (gennadius) (hemiptera: aleyrodidae) is a globally distributed pest. one of the key endosymbionts in b. tabaci is wolbachia, an α-proteobacterium implicated in many important biological processes. previous studies indicated that the infection frequency of wolbachia in middle east-asia minor 1 (meam1) and mediterranean (med) varied greatly among populations in different areas. however, little is known about the factors that influence the prevalence of wolbachia in b. tabaci. in thi ... | 2015 | 26470122 |
| [occurrence dynamics of migratory pest insects cnaphalocrocis medinalis and sogatella furcifera in transgenic bt rice field in xing'an county of guangxi province]. | an investigation was conducted in xing' an county of guangxi province in 2010 to study the occurrence and damage characteristics of two unique migratory pest insects, rice leaffolder (cnaphalocrocis medinalis) and white-backed planthopper (sogatella furcifera), in a transgenic bt rice (cv. hh1 with dual cry1ab+cry1ac genes) field, taking the corresponding non-transgenic parent (cv. mh63) field as the control. no significant differences were observed in the abundance of c. medinalis eggs and larv ... | 2011 | 22303682 |
| isolation ofc-glycosylflavones as probing stimulant of planthoppers in rice plant. | three species of planthopper,nilaparvata lugens,sogatella furcifera, andlaodelphax striatellus, showed characteristic behavior of stylet probing in parenchymal tissues of plants. feeding experiments of planthoppers on aqueous sucrose solution containing the extract of rice plants or barnyard grass revealed the presence of the stimulant for the probing behavior in the plant tissues. eightc-glycosylflavones which stimulated stylet probing were isolated from rice plants. four of them were identifie ... | 1985 | 24310066 |
| overexpression of rice wrky89 enhances ultraviolet b tolerance and disease resistance in rice plants. | wrky proteins are a large family of transcriptional regulators involved in a variety of biological processes in plants. here we report functional characterization of a rice wrky gene, oswrky89. rna gel blot analysis indicated that oswrky89 was strongly induced by treatments of methyl jasmonate and uv-b radiation. the transient expression analysis of the oswrky89-egfp reporter in onion epidermal cells revealed that oswrky89 was targeted to nuclei. transcriptional activity assays of oswrky89 and i ... | 2007 | 17960484 |
| co-infection of two reoviruses increases both viruses accumulation in rice by up-regulating of viroplasm components and movement proteins bilaterally and rna silencing suppressor unilaterally. | synergism between southern rice black-streaked dwarf virus (srbsdv) and rice ragged stunt virus (rrsv) not only aggravates disease symptoms but also enhances their vector acquisition efficiencies by increasing both viruses' titers in co-infected rice plants, which may exacerbate the epidemic of both viruses and cause significant damage to rice production. the molecular mechanism of viral synergism of these two viruses remains unexplored. | 2017 | 28789694 |
| a novel method for transmitting southern rice black-streaked dwarf virus to rice without insect vector. | southern rice black-streaked dwarf virus (srbsdv) has spread from the south of china to the north of vietnam in the past few years, and has severely influenced rice production. however, previous study of traditional srbsdv transmission method by the natural virus vector, the white-backed planthopper (wbph, sogatella furcifera), in the laboratory, researchers are frequently confronted with lack of enough viral samples due to the limited life span of infected vectors and rice plants and low virus ... | 2017 | 28810884 |
| enhanced resistance to four species of clypeorrhynchan pests in neotyphodium uncinatum infected italian ryegrass. | particular alkaloids produced by neotyphodium endophytes show toxicity to invertebrates. italian ryegrass (lolium multiflorum lamarck) cultivars and strains that are symbiotic with neotyphodium endophytes have been recently established in japan. n. uncinatum-infected italian ryegrass lines accumulate n-formylloline, a type of loline alkaloid (1-aminopyrrolizidine) showing neurotoxicity to herbivorous insects. this study investigated the toxicity of n-formylloline and resistance of n. uncinatum-i ... | 2012 | 22420264 |
| biochar amendment changes jasmonic acid levels in two rice varieties and alters their resistance to herbivory. | biochar addition to soil not only sequesters carbon for the long-term but enhances agricultural productivity. several well-known benefits arise from biochar amendment, including constant provision of nutrients, increased soil moisture retention, decreased soil bulk density, and sometimes the induction of systemic resistance against foliar and soil borne plant pathogens. however, no research has investigated the potential of biochar to increase resistance against herbivory. the white-backed plant ... | 2018 | 29373575 |
| effects of nitrogen on egg-laying inhibition and ovicidal response in planthopper-resistant rice varieties. | a series of experiments was set up to examine the effects of nitrogen on rice (oryza sativa l.) resistance against nilaparvata lugens (stål) and sogatella furcifera (horváth). egg laying by n. lugens was reduced on the indica variety ir60. nymph biomass (n. lugens and s. furcifera) was also lower on ir60: this was associated with low honeydew production and a high proportion of xylem-derived honeydew in n. lugens but not in s. furcifera. nitrogen increased egg-laying by s. furcifera and increase ... | 2016 | 27812236 |
| studies on the probing stimulants for the white-backed planthopper, sogatella furcifera (homoptera: delphacidae) in rice plant (oryza sativa l.). | to elucidate the probing stimulants in rice plants for the white-backed planthopper, sogatella furcifera, bioassay-guided separations were conducted, which led to the isolation of four active compounds. using nmr and lc-ms spectra, their structures were determined as isoorientin 2″-o-(6‴-(e)-feruloyl)glucoside, isoorientin 2″-o-(6‴-(e)-p-coumaroyl)glucoside, tricin 5-o-glucoside, and isoscoparin 2″-o-(6‴-(e)-feruloyl)glucoside. | 2016 | 27685157 |
| structural determination of elicitors in sogatella furcifera (horváth) that induce japonica rice plant varieties (oryza sativa l.) to produce an ovicidal substance against s. furcifera eggs. | certain japonica rice plant varieties (oryza sativa l.) show resistance to the eggs of the white backed planthopper (sogatella furcifera horváth) by the formation of watery lesions and production of benzyl benzoate, an active ovicidal compound. benzyl benzoate results in high ovicidal activity of s. furcifera eggs and reduces egg hatchability. the production of benzyl benzoate by the rice plants is only induced by an unknown elicitor(s) from the female s. furcifera. therefore, we tried to isolat ... | 2014 | 25036116 |
| quantitative trait loci identification, fine mapping and gene expression profiling for ovicidal response to whitebacked planthopper (sogatella furcifera horvath) in rice (oryza sativa l.). | the whitebacked planthopper (wbph), sogatella furcifera horváth, is a serious rice pest in asia. ovicidal resistance is a natural rice defense mechanism against wbph and is characterized by the formation of watery lesions (wls) and increased egg mortality (em) at the wbph oviposition sites. | 2014 | 24886295 |
| an injury equivalency system for establishing a common economic threshold for three species of rice planthoppers (hemiptera: delphacidae) in taiwan. | the economic threshold (et) for multiple pest species that share the same injury type on host plants (feeding guild) has been proposed for decision-making in integrated management framework of many defoliating insect pests. however, only a few consider agricultural pests with sucking mouthparts. this study presents the first injury equivalency system for the feeding guild made up of three rice (oryza sativa l.) planthopper (hemiptera: delphacidae) species--nilaparvata lugens (stål), sogatella fu ... | 2013 | 23786072 |
| elicitor(s) in sogatella furcifera (horváth) causing the japanese rice plant (oryza sativa l.) to induce the ovicidal substance, benzyl benzoate. | we elucidate the mechanism for inducing the production of ovicidal benzyl benzoate by japonica rice varieties to kill eggs of the whitebacked planthopper, sogatella furcifera (horváth), lying in the rice plant. even when subjected to physical damage by a needle or damage with water, the rice plant produced no benzyl benzoate. however, significant benzyl benzoate was produced when the plant was damaged with a methanol extract or homogenate of s. furcifera. the extract of the male did not induce t ... | 2013 | 23748769 |
| mapping and pyramiding of two major genes for resistance to the brown planthopper (nilaparvata lugens [stål]) in the rice cultivar adr52. | the brown planthopper (bph), nilaparvata lugens (stål), is one of the most serious and destructive pests of rice, and can be found throughout the rice-growing areas of asia. to date, more than 24 major bph-resistance genes have been reported in several oryza sativa ssp. indica cultivars and wild relatives. here, we report the genetic basis of the high level of bph resistance derived from an indian rice cultivar, adr52, which was previously identified as resistant to the whitebacked planthopper ( ... | 2012 | 22048639 |
| the a2'n mutation of the rdl gamma-aminobutyric acid receptor conferring fipronil resistance in laodelphax striatellus (hemiptera: delphacidae). | the planthopper laodelphax striatellus (fallén) (hemiptera: delphacidae) is a serious insect pest of rice, oryza sativa l., and has developed resistance to fipronil in japan. sequence analysis of l. striatellus rdl gamma-aminobutyric acid (gaba) receptor subunit (ls-rdl) genes from a fipronil-resistant population and a fipronil-susceptible strain identified the a2'n mutation (index number for m2 membrane-spanning region), that was previously implicated in fipronil resistance in the planthopper s ... | 2011 | 21510217 |
| genetic analysis of resistance to whitebacked planthopper in twenty-one varieties of rice, oryza sativa l. | the inheritance of resistance to whitebacked planthopper sogatella furcifera (horvath) was studied in 21 rice varieties. reactions of f1; f2 and f3 progenies of the crosses of 21 resistant varieties with the susceptible variety 'tn 1' revealed that a single dominant gene governs resistance in 'mushkan 41', 'santhi', 'siahnakidar 195', 'sm2-34', 'tirisurkh 251', 'zirijowaian 245', '18', '24a', '39', '76 s', '78', '180', '213 b', '267', '293', 'ci 6037-4', 'np97', 's39 jkw' and 'bansphul'. in vari ... | 1982 | 24271368 |
| cry64ba and cry64ca, two etx/mtx2-type bacillus thuringiensis insecticidal proteins active against hemipteran pests. | genetically modified crops that express insecticidal bacillus thuringiensis (bt) proteins have become a primary approach for control of lepidopteran (moth) and coleopteran (beetle) pests that feed by chewing the plants. however, the sap-sucking insects (hemiptera) are not particularly susceptible to bt toxins. in this study, we describe two cry toxins (cry64ba and cry64ca) from bt strain 1012 that showed toxicity against two important hemipteran rice pests, laodelphax striatellus and sogatella f ... | 2018 | 29150505 |
| investigation of alimentary canal ultrastructure following knockdown of the dicer-2 gene in planthoppers reveals the potential pathogenicity of southern rice black streaked dwarf virus to its insect vector. | an increasing number of studies are suggesting that plant viruses, including southern rice black-streaked dwarf virus (srbsdv), can adversely affect biological characteristics of insect vectors by unknown mechanisms. to study the adverse effect of srbsdv at cellular level on the insect vector, we promoted viral infection by the disruption of the small interfering rna (sirna) pathway. the transmission electron microscopy was utilized to describe the ultrastructural changes that occurred in insect ... | 2017 | 29141205 |
| genome sequence of the small brown planthopper, laodelphax striatellus. | laodelphax striatellus fallén (hemiptera: delphacidae) is one of the most destructive rice pests. l. striatellus is different from 2 other rice planthoppers with a released genome sequence, sogatella furcifera and nilaparvata lugens, in many biological characteristics, such as host range, dispersal capacity, and vectoring plant viruses. deciphering the genome of l. striatellus will further the understanding of the genetic basis of the biological differences among the 3 rice planthoppers. | 2017 | 29136191 |
| combined transcriptomic/proteomic analysis of salivary gland and secreted saliva in three planthopper species. | the planthoppers are piercing-sucking pests that continuously inject saliva into host plants using specialized stylets. however, knowledge on the constituent and function of planthopper saliva proteins was still limited. in this study, the transcriptomic and proteomic approach were adopted to characterize the composition of salivary glands and their secreted saliva in three planthoppers, respectively. gene repertoires of salivary glands in brown planthopper (nilaparvata lugens, bph), white-backe ... | 2018 | 29109049 |
| comparative analysis of the transcriptional responses to low and high temperatures in three rice planthopper species. | the brown planthopper (nilaparvata lugens, bph), white-backed planthopper (sogatella furcifera, wbph) and small brown planthopper (laodelphax striatellus, sbph) are important rice pests in asia. these three species differ in thermal tolerance and exhibit quite different migration and overwintering strategies. to understand the underlying mechanisms, we sequenced and compared the transcriptome of the three species under different temperature treatments. we found that metabolism-, exoskeleton- and ... | 2017 | 28214356 |
| resistance monitoring and cross-resistance patterns of three rice planthoppers, nilaparvata lugens, sogatella furcifera and laodelphax striatellus to dinotefuran in china. | three rice planthoppers, brown planthopper, nilaparvata lugens, white-backed planthopper, sogatella furcifera and small brown planthopper, laodelphax striatellus, are important pests of cultivated rice in tropical and temperate asia. they have caused severe economic loss and developed resistance to insecticides from most chemical classes. dinotefuran is the third neonicotinoid which possesses a broad spectrum and systemic insecticidal activity. we determined the susceptibility of dinotefuran to ... | 2016 | 27914544 |
| mechanisms of resistance to insecticides targeting rdl gaba receptors in planthoppers. | lindane and cyclodienes, such as dieldrin and α-endosulfan, represent the first generation of noncompetitive antagonists (ncas) against the insect rdl gaba receptor. it has been reported that a2's and a2'g mutations in the membrane-spanning region m2 of the rdl gaba receptor confer resistance to lindane and cyclodienes. fipronil is a second-generation nca, but a2's and a2'g mutations provide a low level of cross-resistance to fipronil. moreover, a novel a2'n mutation that confers fipronil resist ... | 2017 | 27000517 |
| genetic and biochemical mechanisms of rice resistance to planthopper. | this article presents a comprehensive review on the genetic and biochemical mechanisms governing rice-planthopper interactions, aiming to contribute substantial planthopper control and facilitate breeding for resistance to planthoppers in rice. the rice planthopper is the most destructive pest of rice and a substantial threat to rice production. the brown planthopper (bph), white-backed planthopper (wbph) and small brown planthopper (sbph) are three species of delphacid planthoppers and importan ... | 2016 | 26979747 |
| susceptibility of sogatella furcifera and laodelphax striatellus (hemiptera: delphacidae) to six insecticides in china. | the whitebacked planthopper, sogatella furcifera (horváth), and small brown planthopper, laodelphax striatellus (fallén), both are important crop pests throughout china, especially in rice. application of chemical insecticides is the major control practice. consequently, insecticide resistance has become an urgent issue. in this study, resistance levels to six conventional insecticides were evaluated for these two species collected from major occurring areas of china. additionally, imidacloprid- ... | 2014 | 26309282 |
| take-off time of the first generation of the overwintering small brown planthopper, laodelphax striatellus in the temperate zone in east asia. | overseas migration of the small brown planthopper, laodelphax striatellus (fallén), occurs during the winter wheat harvest season in east asia. knowing the take-off time of emigrating l. striatellus is crucial for predicting such migrations with a simulation technique because winds, carriers of migratory insects, change continuously. several methods were used in china and japan from late may to early june 2012 and again in 2013 to identify the precise timing of take-off. these methods included: ... | 2015 | 25780936 |
| effects of two pesticides, tzp and jgm, on reproduction of three planthopper species, nilaparvata lugens stål, sogatella furcifera horvath, and laodelphax striatella fallén. | three planthopper species, the brown planthopper (bph), nilaparvata lugens stål, the white-backed planthopper (wbph), sogatella furcifera horvath, and the small brown planthopper (sbph), laodelphax striatella fallén, often co-occur in rice grown regions of china. the present investigation examined effects of two pesticides, triazophos (tzp) and jinggangmycin (jgm) (a fungicide), on reproduction of bph, wbph, and sbph. the results showed that tzp stimulated the fecundity of the three planthopper ... | 2014 | 25307466 |
| small brown planthopper resistance loci in wild rice (oryza officinalis). | host-plant resistance is the most practical and economical approach to control the rice planthoppers. however, up to date, few rice germplasm accessions that are resistant to the all three kinds of planthoppers (1) brown planthopper (bph; nilaparvata lugens stål), (2) the small brown planthopper (sbph; laodelphax striatellus fallen), and (3) the whitebacked planthopper (wbph, sogatella furcifera horvath) have been identified; consequently, the genetic basis for host-plant broad spectrum resistan ... | 2014 | 24504629 |
| the complete mitochondrial genome sequence of sogatella furcifera (horváth) and a comparative mitogenomic analysis of three predominant rice planthoppers. | the white-backed planthopper (wbph), sogatella furcifera (horváth), is one of the most destructive pests of rice crops in many asian countries. using long-pcr and shotgun library methods, we sequenced the entire mitochondrial genomes (mt-genomes) of two wbph individuals. total lengths of the mt-genome of the two wbph individuals were 16,612 bp and 16,654 bp with an identical at content of 76.19%. among the 13 protein coding genes (pcgs), only nad5 used an atypical initiation codon gtg. most of t ... | 2014 | 24120898 |
| various infection status and molecular evidence for horizontal transmission and recombination of wolbachia and cardinium among rice planthoppers and related species. | wolbachia and cardinium are widely distributed and are considered important for their ability to disturb reproduction and affect other fitness-related traits of their hosts. by using multilocus sequence typing (mlst), rflp (restriction fragment length polymorphism) and 16s ribosomal dna gene sequencing methods, we extensively surveyed wolbachia and cardinium infection status of four predominant rice planthoppers and one kind of leafhopper in different rice fields. the results demonstrated that s ... | 2013 | 23955885 |
| development and preliminary application of a triplex real-time polymerase chain reaction assay for evaluating predation on three planthoppers in a rice ecosystem. | a multiplex real-time quantitative polymerase chain reaction (pcr) assay was developed to simultaneously detect the dna of three rice planthoppers, that is, sogatella furcifera (horváth) (white-backed planthopper), nilaparvata lugens (stål) (brown planthopper) and laodelphax striatellus (fallén) (small brown planthopper), in the gut of their predators. the sets of primers and allglo probes were targeted to the regions of internal transcribed spacer 2 (its2) genes in nuclear ribosomal dna (rdna). ... | 2013 | 23711378 |
| diversity of planthoppers associated with the winter rice agroecosystems in southern yunnan, china. | a field survey of the overwintering planthoppers (hemiptera: delphacidae) associated with the rice agroecosystems in southern yunnan was carried out during january-february in 2010 and 2011. 22 species of planthoppers were collected and identified, with one species representing the subfamily stenocraninae and the other 21 species in delphacinae. nycheuma cognatum (muir), peregrinus maidis (ashmead), and pseudosogata vatrenus (fennah) were new provincial records for yunnan. the pest species, soga ... | 2012 | 22958347 |
| influence of pymetrozine on feeding behaviors of three rice planthoppers and a rice leafhopper using electrical penetration graphs. | pymetrozine reportedly inhibits feeding of plant sap-sucking insects, such as aphids and brown planthopper (nilaparvata lugens (stål)). by using electrical penetration graph (epg), this study was conducted to investigate any differential effect of pymetrozine on the feeding behaviors of four major rice sap-sucking insect species, 1) n. lugens, 2) white-backed planthopper (sogatella furcifera (horváth)), 3) small brown planthopper (laodelphax striatellus (fallen)), and 4) green rice leafhopper (n ... | 2011 | 22299348 |
| effects of seed mixture sowing with transgenic bt rice and its parental line on the population dynamics of target stemborers and leafrollers, and non-target planthoppers. | the widespread planting of insect-resistant crops has caused a dramatic shift in agricultural landscapes, thus raising concerns about the potential impacts on both target and non-target pests. in this study, we examined the potential effects of intra-specific seed mixture sowing with transgenic bt rice (bt) and its parental non-transgenic line (nt) [100% bt rice (bt100 ), 5% nt+95% bt (nt05 bt95 ), 10% nt+90% bt (nt10 bt90 ), 20% nt+80% bt (nt20 bt80 ), 40% nt+60% bt (nt40 bt60 ), and 100% nt ri ... | 2018 | 29368405 |
| bph6 encodes an exocyst-localized protein and confers broad resistance to planthoppers in rice. | the brown planthopper (bph) and white-backed planthopper (wbph) are the most destructive insect pests of rice, and they pose serious threats to rice production throughout asia. thus, there are urgent needs to identify resistance-conferring genes and to breed planthopper-resistant rice varieties. here we report the map-based cloning and functional analysis of bph6, a gene that confers resistance to planthoppers in rice. bph6 encodes a previously uncharacterized protein that localizes to exocysts ... | 2018 | 29358653 |
| effects of seed mixture sowing with resistant and susceptible rice on population dynamics of target planthoppers and non-target stemborers and leaffolders. | the widespread planting of insect-resistant crops has caused a dramatic shift in agricultural landscapes, thus raising concerns about the potential impact on both target and non-target pests worldwide. in this study, we examined the potential effects of six seed-mixture ratios of insect-resistant dominance (100%-r100, 95%-s05r95, 90%-s10r90, 80%-s20r80, 60%-s40r60, and 0%-s100) on target and non-target pests in a 2-year field trial in southern china. | 2018 | 29330915 |
| insecticide susceptibilities of the two rice planthoppers nilaparvata lugens and sogatella furcifera in east asia, the red river delta, and the mekong delta. | the two rice planthoppers, nilaparvata lugens and sogatella furcifera, have different life cycles in the regions of east asia, the red river delta, and the mekong delta. the susceptibilities of these species to a range of insecticides have not previously been compared among the three regions over multiple years. here, we describe the differences and similarities in insecticide susceptibilities of the two species among the three regions in 2006-2011. | 2018 | 28898522 |
| induction of p450 genes in nilaparvata lugens and sogatella furcifera by two neonicotinoid insecticides. | nilaparvata lugens and sogatella furcifera are two primary planthoppers on rice throughout asian countries and areas. neonicotinoid insecticides, such as imidacloprid (imi), have been extensively used to control rice planthoppers and imi resistance consequently occurred with an important mechanism from the over-expression of p450 genes. the induction of p450 genes by imi may increase the ability to metabolize this insecticide in planthoppers and increase the resistance risk. in this study, the i ... | 2017 | 28092127 |
| population dynamics of rice planthoppers, nilaparvata lugens and sogatella furcifera (hemiptera, delphacidae) in central vietnam and its effects on their spring migration to china. | rice planthopper (rph) populations of nilaparvata lugens and sogatella furcifera periodically have erupted across asia. predicting rph population dynamics and identifying their source areas are crucial for the management of these migratory pests in china, but the origins of the migrants to temperate and subtropical regions in china remains unclear. in particular, their early migration to china in march and april have not yet been explored due to a lack of research data available from potential s ... | 2017 | 27919313 |
| a cripavirus in the brown planthopper, nilaparvata lugens. | a cripavirus-like long unique sequence was identified during transcriptome sequencing of the brown planthopper (bph), nilaparvata lugens. this unique sequence demonstrated high similarity with the whole-genome sequence of cricket paralysis virus, including 5' and 3' untranslated regions; thus we considered it the whole genome of a new virus. we propose that the virus be named nilaparvata lugens c virus (nlcv). the plus-strand rna genome spanned 9144 nt, excluding a 3' poly(a) tail with two large ... | 2016 | 26746854 |
| wingless gene cloning and its role in manipulating the wing dimorphism in the white-backed planthopper, sogatella furcifera. | wingless gene (wg) plays a fundamental role in regulating the segment polarity and wing imaginal discs of insects. the rice planthoppers have an obvious wing dimorphism, and the long- and short-winged forms exist normally in natural populations. however, the molecular characteristics and functions of wg in rice planthoppers are poorly understood, and the relationship between expression level of wg and wing dimorphism has not been clarified. | 2014 | 25266639 |
| isolation, characterization, and cross-transferability of microsatellite markers from the whitebacked planthopper (sogatella furcifera). | the whitebacked planthopper sogatella furcifera (horváth) (hemiptera: delphacidae) is one of the most harmful pests of rice. in this study, 18 polymorphic microsatellite markers were developed from s. furcifera genomic libraries using the fast isolation by amplified fragment length polymorphism of sequences containing repeat protocols. microsatellite polymorphism was investigated using 32 individuals from one natural population. these 18 simple sequence repeat markers showed a number of alleles ... | 2014 | 25158251 |
| feeding-induced interactions between two rice planthoppers, nilaparvata lugens and sogatella furcifera (hemiptera: delphacidae): effects on feeding and honeydew excretion. | a series of laboratory experiments was conducted using electrical penetration graph, salivary flange, and honeydew measurement to study the effects of feeding-induced intra- and interspecific interactions on feeding behavior and honeydew excretion between planthoppers nilaparvata lugens (stål) and sogatela furcifera (horváth). feeding-induced intra- and interspecific interactions affected many measures of feeding behavior. the number of salivary flanges, mean duration of pathway activities per i ... | 2013 | 24468558 |
| insecticide susceptibilities in populations of two rice planthoppers, nilaparvata lugens and sogatella furcifera, immigrating into japan in the period 2005-2012. | the brown planthopper nilaparvata lugens and the whitebacked planthopper sogatella furcifera are both important pests on rice throughout asia. the major cause of recent outbreaks is thought to be the development of insecticide resistance. thus, the authors monitored insecticide susceptibilities in populations of these two insects immigrating into japan in the period 2005-2012. ten insecticides were tested, including members of the organophosphate, carbamate, pyrethroid, neonicotinoid and phenylp ... | 2014 | 23754555 |
| mitochondrial cox sequences of nilaparvata lugens and sogatella furcifera (hemiptera, delphacidae): low specificity among asian planthopper populations. | the brown planthoppers (bph) nilaparvata lugens (stål) and the white-backed planthoppers (wbph) sogatella furcifera (horváth) annually migrate from tropical and subtropical regions to temperate regions in asia, including japan, korea and northern china. to elucidate the genetic divergence based on geography of planthoppers and to estimate their migration route on the basis of molecular data, we analysed a part of their mitochondrial genome sequences. sequences of cytochrome oxidase subunit i (co ... | 2013 | 23537548 |