Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
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| selection of endogenous reference genes for gene expression analysis in the mediterranean species of the bemisia tabaci (hemiptera: aleyrodidae) complex. | quantitative real-time reverse transcription polymerase chain reaction is widely used for gene expression analysis, and robust normalization against stably expressed endogenous reference genes (ergs) is necessary to obtain accurate results. in this study, the stability of nine housekeeping genes of the sweetpotato whitefly, bemisia tabaci (hemiptera: aleyrodidae) mediterranean were evaluated in various conditions by quantitative real-time reverse transcription polymerase chain reaction using gen ... | 2013 | 23865213 |
| comparative antifeedant activities of polygodial and pyrethrins against whiteflies (bemisia tabaci) and aphids (myzus persicae). | polygodial, a sesquiterpene dialdehyde of the drimane family, has been shown to have deterrent and antifeedant effects on various insect species, including myzus persicae (sulzer), spodoptera spp. and leptinotarsa decemlineata (say). this compound may have potential as a broad-spectrum biocontrol agent, similar to pyrethrins, given that it was previously reported to improve yield when sprayed on barley fields. | 2014 | 23868321 |
| virus infection of a weed increases vector attraction to and vector fitness on the weed. | weeds are important in the ecology of field crops, and when crops are harvested, weeds often become the main hosts for plant viruses and their insect vectors. few studies, however, have examined the relationships between plant viruses, vectors, and weeds. here, we investigated how infection of the weed datura stramonium l. by tomato yellow leaf curl virus (tylcv) affects the host preference and performance of the tylcv vector, bemisia tabaci (gennadius) q. the results of a choice experiment indi ... | 2013 | 23872717 |
| investigation on some biological aspects of chrysoperla lucasina (chrysopidae: neuroptera) on bemisia tabaci in laboratory conditions. | bemisia tabaci is one of the most important key pests of many types of cultivated plants. lacewings (chrysopidae: neuroptera) are predatory insects, widely used in biological control programs. between them green lacewing is a promising biological control agent of pests in green houses and crop fields. in this study, gravid females of the green lacewing chrysoperla lucasina (lacroix) were captured from sarepolzahab ( altitude 540m, latitude 34 degrees ,14' n 46 degrees, 9' e) in western part of i ... | 2012 | 23885430 |
| preliminary studies of effectiveness and selectivity of movento on bemisia tabaci and its parasitoid eretmocerus mundus. | the bemisia tabaci gennadius (homoptera:aleyrodidae) biotype complex is a key pest of several worldwide crops. the management and control of this pest has become difficult mainly due to its high reproductive rate and capacity to develop resistance to broad spectrum insecticides. in argentina b. tabaci whitefly, causes economic losses in most areas of agricultural production. eretmocerus mundus mercet (hymenoptera:aphelinidae) is the most important parasitoid of b. tabaci and is commercialized as ... | 2012 | 23885443 |
| transcriptome profiling of the whitefly bemisia tabaci reveals stage-specific gene expression signatures for thiamethoxam resistance. | bemisia tabaci has developed high levels of resistance to many insecticides including the neonicotinoids and there is strong evidence that for some compounds resistance is stage-specific. to investigate the molecular basis of b. tabaci resistance to the neonicotinoid thiamethoxam we used a custom whitefly microarray to compare gene expression in the egg, nymph and adult stages of a thiamethoxam-resistant strain (th-r) with a susceptible strain (th-s). gene ontology and bioinformatic analyses rev ... | 2013 | 23889345 |
| detoxification activity and energy cost is attenuated in whiteflies feeding on tomato yellow leaf curl china virus-infected tobacco plants. | the begomovirus tomato yellow leaf curl china virus (tylccnv) can benefit its vector, the whitefly bemisia tabaci, through suppressing the defences of their shared host plants. however, the mechanisms of this vector-virus mutualism remain largely unknown on the insect side of the interaction. here, we compared the transcriptional profiles of female adult whiteflies of b. tabaci middle east-asia minor 1 feeding on tylccnv-free and tylccnv-infected tobacco plants using the next-generation sequenci ... | 2013 | 23889516 |
| recruitment of the host plant heat shock protein 70 by tomato yellow leaf curl virus coat protein is required for virus infection. | a functional capsid protein (cp) is essential for host plant infection and insect transmission of tomato yellow leaf curl virus (tylcv) and other monopartite begomoviruses. we have previously shown that tylcv cp specifically interacts with the heat shock protein 70 (hsp70) of the virus insect vector, bemisia tabaci. here we demonstrate that during the development of tomato plant infection with tylcv, a significant amount of hsp70 shifts from a soluble form into insoluble aggregates. cp and hsp70 ... | 2013 | 23894631 |
| response of bemisia tabaci genn. (hemiptera: aleyrodidae) biotype b to genotypes of pepper capsicum annuum (solanales: solanaceae). | bemisia tabaci genn. biotype b is a widely distributed plant pest that represents one of the major constraints for horticultural crop production. the purpose of the present work was to evaluate the oviposition preference, survivorship, and development of b. tabaci biotype b on semi-cultivated genotypes of capsicum annuum from southeast mexico. in free-choice experiments to evaluate the oviposition preference, lower number of eggs laid by b. tabaci biotype b was observed in the genotypes maax and ... | 2013 | 23949756 |
| high variation in single nucleotide polymorphisms (snps) and insertions/deletions (indels) in the highly invasive bemisia tabaci (gennadius) (hemiptera: aleyrodidae) middle east-asia minor 1 (meam1). | bemisia tabaci (gennadius) (hemiptera: aleyrodidae) middle east-asia minor 1 (meam1) is invasive and adaptive to varied environments throughout the world. the adaptability is closely related to genomic variation such as single nucleotide polymorphisms (snps) and insertions/deletions (indels). in order to elucidate the feature of snps and indels in meam1, and reveal the association between snps/indels and adaptive capacity to various environments, a computational approach with qualitysnp was used ... | 2013 | 23949985 |
| diversity of secondary endosymbionts among different putative species of the whitefly bemisia tabaci. | endosymbionts are important components of arthropod biology. the whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae) is a cryptic species complex composed of ≥ 28 putative species. in addition to the primary endosymbiont portiera aleyrodidarum, six secondary endosymbionts (s-endosymbionts), hamiltonella, rickettsia, wolbachia, cardinium, arsenophonus and fritschea, have been identified in b. tabaci thus far. here, we tested five of the six s-endosymbiont lineages (excluding fritschea) f ... | 2013 | 23955860 |
| multiple generation effects of high temperature on the development and fecundity of bemisia tabaci (gennadius) (hemiptera: aleyrodidae) biotype b. | insects are ectotherms and their ability to resist temperature stress is limited. the immediate effects of sub-lethal heat stress on insects are well documented, but longer-term effects of such stresses are rarely reported. in this study, survival, development and reproduction of the whitefly, bemisia tabaci (gennadius) (hemiptera: aleyrodidae) biotype b, were compared over five consecutive generations at 27, 31 and 35 °c and for one generation at 37 °c. both temperature and generation significa ... | 2013 | 23955949 |
| the bemisia tabaci species complex: additions from different parts of the world. | bemisia tabaci is one of the most threatening pests in many crops. we sequenced part of the mitochondrial cytochrome oxidase i gene from fifty whitefly populations collected in indonesia, thailand, india and china. nineteen unique sequences (haplotypes) of the cytochrome oxidase i were identified in these populations. they were combined with sequences available in databases, resulting in a total of 407 haplotypes and analyzed together with nine outgroup accessions. a phylogenetic tree was calcul ... | 2013 | 23955997 |
| selection of lecanicillium strain with high virulence against developmental stages of bemisia tabaci. | selection of fungal strains with high virulence against the developmental stages of bemisia tabaci was performed using internal transcribed spacer regions. the growth rate of hyphae was measured and bioassay of each developmental stage of b. tabaci was conducted for seven days. all of the fungal strains tested were identified as lecanicillium spp., with strain 4078 showing the fastest mycelium growth rate (colony diameter, 16.3 ± 0.9 mm) among the strains. compared to strain 4075, which showed t ... | 2010 | 23956657 |
| molecular identification of ageratum enation virus, betasatellite and alphasatellite molecules isolated from yellow vein diseased amaranthus cruentus in india. | natural occurrence of yellow vein disease on amaranthus cruentus was observed at lucknow, india in the year 2008. the causal virus was successfully transmitted through whiteflies (bemisia tabaci) from diseased a. cruentus to healthy seedlings of a. cruentus and other test species which indicated begomovirus infection. the begomovirus dna-a, betasatellite, and alphasatellite components associated with yellow vein disease were amplified by rolling circle amplification using ø-29 dna polymerase fro ... | 2013 | 23963765 |
| inoculation of tomato plants with rhizobacteria enhances the performance of the phloem-feeding insect bemisia tabaci. | in their natural environment, plants experience multiple biotic interactions and respond to this complexity in an integrated manner. therefore, plant responses to herbivory are flexible and depend on the context and complexity in which they occur. for example, plant growth promoting rhizobacteria (pgpr) can enhance plant growth and induce resistance against microbial pathogens and herbivorous insects by a phenomenon termed induced systemic resistance (isr). in the present study, we investigated ... | 2013 | 23964283 |
| differences in insect resistance between tomato species endemic to the galapagos islands. | the galapagos islands constitute a highly diverse ecosystem and a unique source of variation in the form of endemic species. there are two endemic tomato species, solanum galapagense and s. cheesmaniae and two introduced tomato species, s. pimpinellifolium and s. lycopersicum. morphologically the two endemic tomato species of the galapagos islands are clearly distinct, but molecular marker analysis showed no clear separation. tomatoes on the galapagos are affected by both native and exotic herbi ... | 2013 | 23972016 |
| comparative studies on the effects of bt-transgenic and nontransgenic cotton on arthropod diversity, seedcotton yield and bollworms control. | the effectiveness of commercial bt-cotton in pest management, influence on arthropod diversity, natural enemies, and toxin flow in the insect fauna under field conditions were studied keeping in view the need to assess bioefficacy and biosafety of bt-transgenic cotton. there were no significant differences in oviposition by helicoverpa armigera on bt-transgenic and non-transgenic cottons (9.2 versus 9.6 eggs plants(-100)), while the numbers of h. armigera larvae were significantly more on non-tr ... | 2013 | 24006809 |
| yield and fibre quality associated with cotton leaf curl disease of bt-cotton in punjab. | cotton leaf curl disease (clcud), caused by gemini virus and transmitted through whitefly (bemisia tabaci) is a serious problem in northern india, affecting the productivity to a great extent. depending upon the severity of infection in susceptible varieties, the disease can cause upto 90.0 % yield losses besides this, it also causes deterioration in fibre quality. the objective of the present study was to determine the effect of cotton leaf curl disease on seed cotton yield and fibre characters ... | 2013 | 24006816 |
| transmission efficiency of tomato apex necrosis virus by bemisia tabaci (hemiptera: aleyrodidae) biotype b in tomato. | tomato apex necrosis virus (toanv) is a new virus that causes important damage in tomato crops from the culiacan valley, sinaloa, mexico. to understand the relationship between toanv and its vector bermisia tabaci (hemiptera: aleyrodidae) (gennadius) biotype b, laboratory and greenhouse trials were completed to: 1) determine the acquisition and inoculation access periods of toanv by b. tabaci from tomato to tomato, 2) understand the transmission efficiency at different b. tabaci population densi ... | 2013 | 24020266 |
| plant-mediated changes in the feeding behavior of an invasive whitefly. | the invasive whitefly bemisia tabaci (gennadius) is a worldwide pest of agricultural crops that feeds on a wide variety of host plants. although host plant preference is known to vary among b. tabaci biotypes, far less is known about the potential for intraspecific divergence caused by long-term isolation on a single species of host plant. we tested the hypothesis that multigenerational isolation of b. tabaci b, a biotype that has been well-established in china for nearly two decades, on three d ... | 2013 | 24073848 |
| tomato yellow leaf curl virus alters the host preferences of its vector bemisia tabaci. | bemisia tabaci, the whitefly vector of tomato yellow leaf curl virus (tylcv), seriously reduces tomato production and quality. here, we report the first evidence that infection by tylcv alters the host preferences of invasive b. tabaci b (middle east-minor asia 1) and q (mediterranean genetic group), in which tylcv-free b. tabaci q preferred to settle on tylcv-infected tomato plants over healthy ones. tylcv-free b. tabaci b, however, preferred healthy tomato plants to tylcv-infected plants. in c ... | 2013 | 24096821 |
| is agriculture driving the diversification of the bemisia tabaci species complex (hemiptera: sternorrhyncha: aleyrodidae)?: dating, diversification and biogeographic evidence revealed. | humans and insect herbivores are competing for the same food crops and have been for thousands of years. despite considerable advances in crop pest management, losses due to insects remain considerable. the global homogenisation of agriculture has supported the range expansion of numerous insect pests and has been driven in part by human-assisted dispersal supported through rapid global trade and low-cost air passenger transport. one of these pests, is the whitefly, bemisia tabaci, a cryptic spe ... | 2013 | 24138220 |
| feeding experience of bemisia tabaci (hemiptera: aleyrodidae) affects their performance on different host plants. | the sweetpotato whitefly, bemisia tabaci biotype b is extremely polyphagous with >600 species of host plants. we hypothesized that previous experience of the whitefly on a given host plant affects their host selection and performance on the plants without previous experience. we investigated the host selection for feeding and oviposition of adults and development and survival of immatures of three host-plant-experienced populations of b. tabaci, namely bemisia-eggplant, bemisia-tomato and bemisi ... | 2013 | 24146985 |
| mapping and introgression of a tomato yellow leaf curl virus tolerance gene, ty-1. | the whitefly-transmitted tomato yellow-leaf curl gemini-virus (tylcv) is a major pathogen of tomatoes. the wild tomato species lycopersicon chilense, which is resistant to the virus, was crossed to the cultivated tomato, l. esculentum. the backcross-1 selfed (bc1s1) generation was inoculated and a symptomless plant was selected. this plant was analyzed using 61 molecular markers, which span the tomato genome, to determine which l. chilense chromosome segments were introgressed. a bc2s1 populatio ... | 1994 | 24185918 |
| protease inhibitors of manduca sexta expressed in transgenic cotton. | to explore the effectiveness of insect derived protease inhibitors in protecting plants against insect feeding, anti-trypsin, anti-chymotrypsin and anti-elastase protease inhibitor (pi) genes from manduca sexta l. were expressed in transgenic cotton (gossypium hirsutum l.). from 198 independent transformants, 35 elite lines were further analyzed. under the control of the 35s promoter of camv, pi accumulated to approximately 0.1% of total protein, depending on the tissue analyzed. using cell-flow ... | 1995 | 24186707 |
| arabidopsis thaliana plants with different levels of aliphatic- and indolyl-glucosinolates affect host selection and performance of bemisia tabaci. | generalist insects show reduced selectivity when subjected to similar, but not identical, host plant chemical signatures. here, we produced transgenic arabidopsis thaliana plants that over-express genes regulating the aliphatic- and indolyl- glucosinolates biosynthetic pathways with either a constitutive (camv 35s) or a phloem-specific promoter (atsuc2). this allowed us to examine how exposure to high levels of aliphatic- or indolyl-glucosinolates in homogenous habitats (leaf cage apparatus cont ... | 2013 | 24190022 |
| activation of the phenylpropanoid pathway in nicotiana tabacum improves the performance of the whitefly bemisia tabaci via reduced jasmonate signaling. | phloem-feeding insects can manipulate plant-induced resistance and are able to suppress effective jasmonic acid/ethylene (ja/et) defenses by the induction of inefficient salicylic acid (sa) based responses. as a result, activation of the phenylpropanoid biosynthesis pathway in transgenic plants is anticipated to cause complex interactions between phloem-feeding insects and their host plants due to predicted contradiction between two defense forces: the toxicity of various phenylpropanoids and th ... | 2013 | 24204646 |
| wind-borne dispersal of a parasitoid: the process, the model, and its validation. | the aphelinid parasitoid eretmocerus hayati zolnerowich & rose (hymenoptera: aphelinidae) was recently released in australia as a biocontrol agent against the crop pest bemisia tabaci gennadius (hemiptera: aleyrodidae). it was found that the parasitoid can spread over several kilometers in a single generation and continue laying eggs for over a fortnight. a simple wind-advection model was fitted to emergence data from a first release between fassifern and kalbar, queensland, and its predictive a ... | 2013 | 24216288 |
| population variability of bemisia tabaci (genn.) in different hosts. | the silverleaf whitefly, bemisia tabaci (genn.) (hemiptera: aleyrodidae), is a cryptic species complex that contains some of the most damaging pests in tropical and subtropical regions. recent studies have indicated that this complex is composed of at least 24 distinct and morphologically indistinguishable species that mainly differ in their ability to transmit phytoviruses, adapt to hosts, and induce physiological changes in certain hosts. the importance of this species has been increasing worl ... | 2013 | 24222237 |
| enhanced methanol production in plants provides broad spectrum insect resistance. | plants naturally emit methanol as volatile organic compound. methanol is toxic to insect pests; but the quantity produced by most of the plants is not enough to protect them against invading insect pests. in the present study, we demonstrated that the over-expression of pectin methylesterase, derived from arabidopsis thaliana and aspergillus niger, in transgenic tobacco plants enhances methanol production and resistance to polyphagous insect pests. methanol content in the leaves of transgenic pl ... | 2013 | 24223989 |
| sources and inheritance of resistance to leaf curl virus in lycopersicon. | one hundred and twenty-two varieties, lines and wild accessions of lycopersicon were screened under three different regimes during the autumn/winter season of 1982-83 and 1983-84 for resistance to tomato leaf curl virus (tlcv). l. hirsutum f. glabratum ('b6013') and l. hirsutum f. typicum ('a1904') proved to be highly resistant to tlcv in all three environments. various accessions of l. peruvianum were also highly resistant. l. pimpinellifolium ('a1921') exhibited no tlcv symptoms within 90 days ... | 1987 | 24241195 |
| the allelic relationship of genes giving resistance to mungbean yellow mosaic virus in blackgram. | the allelic relationship of resistance genes for mymv was studied in blackgram (v. mungo (l.) hepper). the resistant donors to mymv - 'pant u84' and 'upu 2', and their f1, f2 and f3 generations - were inoculated artificially using an insect vector, whitefly (bemisia tabaci genn.). the two recessive genes previously reported for resistance were found to be the same in both donors. | 1986 | 24248192 |
| two cytochrome p450 genes are involved in imidacloprid resistance in field populations of the whitefly, bemisia tabaci, in china. | the sweet potato whitefly, bemisia tabaci (gennadius) (hemiptera:aleyrodidae), is an invasive and damaging pest of field crops worldwide. the neonicotinoid insecticide imidacloprid has been widely used to control this pest. we assessed the species composition (b vs. q), imidacloprid resistance, and association between imidacloprid resistance and the expression of five p450 genes for 14-17 b. tabaci populations in 12 provinces in china. fifteen of 17 populations contained only b. tabaci q, and tw ... | 2013 | 24267696 |
| invasion of the q2 mitochondrial variant of mediterranean bemisia tabaci in southern italy: possible role of bacterial endosymbionts. | the whitefly bemisia tabaci (gennadius) is a complex of cryptic species, some of which, namely the mediterranean (med) and the middle east-asia minor 1 (meam1), are highly invasive and injurious crop pests worldwide and able to displace local genotypes. invasiveness of b. tabaci may depend on the phenotype of inherited bacterial endosymbionts. here, the b. tabaci genetic diversity variation that has occurred in recent years in southern italy was examined. whitefly was genotyped by restriction fr ... | 2014 | 24272923 |
| establishment of an in vitro method for evaluating whitefly resistance in tomato. | an accurate and simple evaluation method is crucial for identifying whitefly resistance in tomato breeding. we developed an in vitro method for evaluating resistance of tomato leaves and tested this on wild and cultivated tomato varieties. we found that young leaves observed for whitefly oviposition after 8 hours provided appropriate comparative conditions. this method effectively distinguished resistance among tomato cultivars and wild species and also demonstrated significant difference in ovi ... | 2013 | 24273418 |
| facultative symbiont hamiltonella confers benefits to bemisia tabaci (hemiptera: aleyrodidae), an invasive agricultural pest worldwide. | bacterial symbionts infect most insect species, including important pests such as whitefly, bemisia tabaci (gennadius) (hemiptera: aleyrodidae), and often exert important effects on host ecology. the facultative symbiont hamiltonella is found at high frequencies in the b. tabaci med (type: mediterranean-med) in china. the prevalence of this symbiont in natural populations suggests beneficial effects of infection or manipulation of host reproduction. to date, however, no empirical studies on the ... | 2013 | 24280594 |
| dissipation rate of thiacloprid and its control effect against bemisia tabaci in greenhouse tomato after soil application. | thiacloprid is a chloronicotinyl insecticide that is quite effective against sucking insects. in this study, when thiacloprid was applied at two different rates (normal rate 15 kg ha(-1) , double rate 30 kg ha(-1) ), the systemic distribution and residue of thiacloprid as well as its control effect against whitefly (bemisia tabaci) were investigated in greenhouse tomato after soil application. | 2014 | 24282153 |
| spatio-temporal patterns of genetic change amongst populations of cassava bemisia tabaci whiteflies driving virus pandemics in east and central africa. | the greatest current threat to cassava in sub-saharan africa, is the continued expansion of plant virus pandemics being driven by super-abundant populations of the whitefly vector, bemisia tabaci. to track the association of putatively genetically distinct populations of b. tabaci with pandemics of cassava mosaic disease (cmd) and cassava brown streak disease (cbsd), a comprehensive region-wide analysis examined the phylogenetic relationships and population genetics of 642 b. tabaci adults sampl ... | 2014 | 24291251 |
| amplifying long transcripts of ryanodine receptors of five agricultural pests by transcriptome analysis and gap filling. | ryanodine receptor (ryr) is an intracellular calcium release channel that plays a key role in excitation contraction coupling. insect ryr is the target of diamide insecticides. better understanding of insect ryr is necessary for studying the molecular mode of action and potential resistance mechanism of diamide insecticides. however, molecular manipulation of the full ryr gene is difficult because of its length (approximately 15 kb). at present, ryr genes have been reported only in a limited num ... | 2013 | 24299104 |
| transmitting plant viruses using whiteflies. | whiteflies, hemiptera: aleyrodidae, bemisia tabaci, a complex of morphologically indistinquishable species(5), are vectors of many plant viruses. several genera of these whitefly-transmitted plant viruses (begomovirus, carlavirus, crinivirus, ipomovirus, torradovirus) include several hundred species of emerging and economically significant pathogens of important food and fiber crops (reviewed by(9,10,16)). these viruses do not replicate in their vector but nevertheless are moved readily from pla ... | 2013 | 24300175 |
| spatial genetic heterogeneity in populations of a newly invasive whitefly in china revealed by a nation-wide field survey. | even though introductions of exotic species provide ready-made experiments of rapid evolution, few studies have examined the genetic structure of an exotic species shortly after its initial introduction and subsequent spread. to determine the genetic structure of its populations during the initial introduction, we investigated the invasive sweet potato whitefly (bemisia tabaci q, commonly known as b. tabaci biotype q) in china, which was introduced in approximately 2003. a total of 619 b. tabaci ... | 2013 | 24302995 |
| understanding cross-communication between aboveground and belowground tissues via transcriptome analysis of a sucking insect whitefly-infested pepper plants. | plants have developed defensive machinery to protect themselves against herbivore and pathogen attacks. we previously reported that aboveground whitefly (bemisia tabaci genn.) infestation elicited induced resistance in leaves and roots and influenced the modification of the rhizosphere microflora. in this study, to obtain molecular evidence supporting these plant fitness strategies against whitefly infestation, we performed a 300 k pepper microarray analysis using leaf and root tissues of pepper ... | 2014 | 24309116 |
| competitive interactions between parasitoids provide new insight into host suppression. | understanding the dynamics of potential inter- and intraspecific competition in parasitoid communities is crucial in the screening of efficient parasitoid species and for utilization of the best parasitoid species combinations. in this respect, the host-parasitoid systems, bemisia tabaci and two parasitoids, eretmocerus hayati (exotic) and encarsia sophia (existing) were studied under laboratory conditions to investigate whether interference competition between the exotic and existing species oc ... | 2013 | 24312394 |
| preference and prey switching in a generalist predator attacking local and invasive alien pests. | invasive pest species may strongly affect biotic interactions in agro-ecosystems. the ability of generalist predators to prey on new invasive pests may result in drastic changes in the population dynamics of local pest species owing to predator-mediated indirect interactions among prey. on a short time scale, the nature and strength of such indirect interactions depend largely on preferences between prey and on predator behavior patterns. under laboratory conditions we evaluated the prey prefere ... | 2013 | 24312646 |
| lamium amplexicaule (lamiaceae): a weed reservoir for tomato yellow leaf curl virus (tylcv) in korea. | after the first identification of tomato yellow leaf curl virus (tylcv) in the southern part of korea in 2008, tylcv has rapidly spread to tomato farms in most regions of korea. from 2008 to 2010, a survey of natural weed hosts that could be reservoirs of tylcv was performed in major tomato production areas of korea. about 530 samples were collected and identified as belonging to 25 species from 11 families. pcr and southern hybridization were used to detect tylcv in samples, and replicating for ... | 2014 | 24327090 |
| bemisia tabaci nomenclature: lessons learned. | the nomenclature used within the whitefly research community for different putative species within bemisia tabaci (sensu russell) remains highly variable and confused. this was evident by the many different naming schemes researchers were using in their presentations at the 1st international whitefly symposium in kolymbari, crete, greece (20-24 may 2013). i wanted to try to document how we, as a community, have arrived at such a state of confused nomenclature. this also included an investigation ... | 2014 | 24338873 |
| torradoviruses are transmitted in a semi-persistent and stylet-borne manner by three whitefly vectors. | members of the genus torradovirus (family secoviridae, type species tomato torrado virus, totv) are spherical plant viruses transmitted by the whitefly species trialeurodes vaporariorum and bemisia tabaci. knowledge on the mode of vector transmission is lacking for torradoviruses. here, the mode of transmission was determined for tomato marchitez virus (tomarv). a minimal acquisition access period (aap) and inoculation access period (iap) of approximately 2h each was required for its transmissio ... | 2014 | 24342139 |
| asymmetric consequences of host plant occupation on the competition between the whiteflies bemisia tabaci cryptic species meam1 and trialeurodes vaporariorum (hemiptera: aleyrodidae). | the two common whitefly species, bemisia tabaci (gennadius) meam1 and trialeurodes vaporariorum (westwood), often co-occur on their host plants. the effect of host plant occupation by one species on later-arriving conspecific individuals or on the other competing species was examined. | 2014 | 24343857 |
| the bacterial communities in plant phloem-sap-feeding insects. | the resident microbiota of animals represents an important contribution to the global microbial diversity, but it is poorly known in many animals. this study investigated the bacterial diversity in plant phloem-sap-feeding whiteflies, aphids and psyllids by pyrosequencing bacterial 16s rrna gene amplicons. after correction for sequencing error, just 3-7 bacterial operational taxonomic units were recovered from each insect sample sequenced to sufficient depth for saturation of rarefaction curves. ... | 2014 | 24350573 |
| epidemiology and genetic diversity of criniviruses associated with tomato yellows disease in greece. | tomato chlorosis virus (tocv) and tomato infectious chlorosis virus (ticv) are two whitefly transmitted viruses which are classified in the genus crinivirus of the family closteroviridae. both induce similar yellowing symptoms in tomato and are responsible for severe economic losses. tocv is transmitted by bemisia tabaci gennadious, trialeurodes vaporariorum westwood and trialeurodes abutilonea haldeman, whereas ticv is transmitted only by t. vaporariorum. an extensive study was conducted during ... | 2014 | 24370865 |
| bemisia tabaci females from the mediterranean (q) species detect and avoid laying eggs in the presence of pyriproxyfen, a juvenile hormone analogue. | pyriproxyfen, a juvenile hormone analogue, disrupts embryogenesis, metamorphosis and adult formation in bemisia tabaci, but does not directly affect adult females. the effect of pyriproxyfen on egg-laying preference and performance of b. tabaci females and the influence of resistance to pyriproxyfen on these reproductive behaviours were studied. | 2014 | 24375924 |
| comparative susceptibility of bemisia tabaci to imidacloprid in field- and laboratory-based bioassays. | bemisia tabaci biotype b is a resistance-prone pest of protected and open agriculture. systemic uptake bioassays used in resistance monitoring programs have provided important information on susceptibility to neonicotinoid insecticides, but have remained decoupled from field performance. simultaneous bioassays conducted in field and laboratory settings were compared and related to concentrations of imidacloprid in plant tissue for clearer interpretation of resistance monitoring data. | 2014 | 24375968 |
| a bead-based suspension array for the multiplexed detection of begomoviruses and their whitefly vectors. | bead-based suspension array systems enable simultaneous fluorescence-based identification of multiple nucleic acid targets in a single reaction. this study describes the development of a novel approach to plant virus and vector diagnostics, a multiplexed 7-plex array that comprises a hierarchical set of assays for the simultaneous detection of begomoviruses and bemisia tabaci, from both plant and whitefly samples. the multiplexed array incorporates genus, species and strain-specific assays, offe ... | 2014 | 24388931 |
| plant virus differentially alters the plant's defense response to its closely related vectors. | the whitefly, bemisia tabaci (hemiptera: aleyrodidae), is one of the most widely distributed agricultural pests. in recent years, b. tabaci q has invaded china, and q has displaced b in many areas now. in a number of regions of the world, invasion by b and/or q has been followed by outbreaks of tomato yellow leaf curl virus (tylcv). our previous study showed tylcv directly and indirectly modified the feeding behavior of b. tabaci in favor of q rather than b. | 2013 | 24391779 |
| sirna machinery in whitefly (bemisia tabaci). | rna interference has been emerged as an utmost tool for the control of sap sucking insect pests. systemic response is necessary to control them in field condition. whitefly is observed to be more prone to sirna in recent studies, however the sirna machinery and mechanism is not well established. | 2013 | 24391810 |
| activity of flonicamid on the sweet potato whitely bemisia tabaci (homoptera: aleyrodidae) and its natural enemies. | flonicamid is a novel systemic insecticide that acts as a feeding blocker with potential use against whiteflies within ipm control tactics. flonicamid efficacy against bemisia tabaci mediterranean populations from crete was examined, as well as side effects on selected beneficials used extensively in current ipm schemes. | 2014 | 24408346 |
| emergence and diversity of begomoviruses infecting solanaceous crops in east and southeast asia. | over the past three decades diseases caused by whitefly-transmitted geminiviruses (begomoviruses) have emerged to be important constraints to the production of solanaceous crops, particularly tomato (solanum lycopersicum) and peppers (capsicum spp.), in many tropical and subtropical regions of the world. the most studied of these is tomato yellow leaf curl virus (tylcv), which has spread to many other areas from its likely origin in the mediterranean basin region. the virus is usually associated ... | 2014 | 24440320 |
| indigenous american species of the bemisia tabaci complex are still widespread in the americas. | bemisia tabaci is a complex of at least 36 putative cryptic species. since the late 1980s, the middle east-asia minor 1 species (meam1, formerly known as the b biotype), has emerged in many tropical and subtropical regions of the world and in some areas has displaced the indigenous populations of b. tabaci. based on analysis of the mtcoi gene, two indigenous species native to america have been reported: new world (nw, formerly the a biotype) and new world 2 (nw2). nw is present at least in argen ... | 2014 | 24458534 |
| genetic structure of bemisia tabaci med populations from home-range countries, inferred by nuclear and cytoplasmic markers: impact on the distribution of the insecticide resistance genes. | insecticide resistance management in bemisia tabaci is one of the main issues facing agricultural production today. an extensive survey was undertaken in five mediterranean countries to examine the resistance status of med b. tabaci species in its range of geographic origin and the relationship between population genetic structure and the distribution of resistance genes. the investigation combined molecular diagnostic tests, sequence and microsatellite polymorphism studies and monitoring of end ... | 2014 | 24458589 |
| modelling the potential distribution of bemisia tabaci in europe in light of the climate change scenario. | bemisia tabaci is a serious pest of agricultural and horticultural crops in greenhouses and fields around the world. this paper deals with the distribution of the pest under field conditions. in europe, the insect is currently found in coastal regions of mediterranean countries where it is subject to quarantine regulations. to assess the risk presented by b. tabaci to europe, the area of potential establishment of this insect, in light of the climate change scenario, was assessed by a temperatur ... | 2014 | 24458692 |
| global haplotype analysis of the whitefly bemisia tabaci cryptic species asia i in asia. | the whitefly, bemisia tabaci (hemiptera: aleyrodidiae), is a cryptic species complex comprising a minimum of 24 cryptic species. some members of this complex are important agricultural pests, causing considerable damage to vegetable as well as ornamental and horticultural crops. asia i, one of the cryptic species of b. tabaci, is widely distributed in asia. one hundred and sixty mitochondrial cytochrome oxidase i (coi) sequences from eight countries have been analyzed to investigate the geograph ... | 2015 | 24460161 |
| bacterial endosymbionts in field-collected samples of trialeurodes sp. nr. abutiloneus (hemiptera: aleyrodidae). | facultative bacterial endosymbionts are common, influential associates of arthropods, yet their movement among host species has not been well documented. plant-mediated transmission of rickettsia has been shown for the whitefly bemisia tabaci. bemisia tabaci in usa cotton fields harbors the secondary symbionts rickettsia and hamiltonella, and co-occurs with trialeurodes sp. nr. abutiloneus whiteflies. to determine whether symbionts may be shared, the microbial diversity of these whiteflies on co ... | 2014 | 24463012 |
| ipomovirus--an atypical genus in the family potyviridae transmitted by whiteflies. | ipomoviruses (genus ipomovirus) are whitefly-transmitted viruses assigned to the family potyviridae. they are characterised by filamentous flexible particles and a positive-sense single-stranded rna (+ssrna) genome. the viral genome is translated into a polyprotein precursor, which is processed into mature proteins and a short overlapping open reading frame. the genus ipomovirus contains four accepted species and one unapproved species, and two other tentative members have recently been characte ... | 2014 | 24464680 |
| chemical class rotations for control of bemisia tabaci (hemiptera: aleyrodidae) on poinsettia and their effect on cryptic species population composition. | bemisia tabaci, a polyphagous insect with over 900 host plants, is an effective vector of more than 100 plant viruses. being highly fecund, b. tabaci has the potential to develop insecticide resistance rapidly, as demonstrated by reports of use failures with meam1 and med cryptic species (commonly known as biotypes b and q respectively). insecticide resistance management is a key component of pest management practices. the research herein studied season-long rotational management programs on poi ... | 2014 | 24464725 |
| degradation mechanisms of the tomato yellow leaf curl virus coat protein following inoculation of tomato plants by the whitefly bemisia tabaci. | tomato yellow leaf curl virus (tylcv) is a begomovirus infecting tomato cultures worldwide. tylcv is transmitted to plants by the whitefly bemisia tabaci. once in the plant, the virus is subjected to attack by the host-plant defences, which may include sequestration in aggregates, proteolysis, ubiquitination, 26s proteasome degradation and autophagy. elucidating how the virus avoids destruction will make it possible to understand infection and possibly devise countermeasures. | 2014 | 24464776 |
| transmission specificities of plant viruses with the newly identified species of the bemisia tabaci species complex. | bemisia tabaci has had a colorful nomenclatural past and is now recognized as a species complex. this new species framework has added many new areas of research including adding new insight into the virus transmission specificity of the species in the b. tabaci species complex. there is a wide disparity in what is known about the transmission of plant viruses by different members of the b. tabaci species complex. in this paper, we have synthesized the transmission specificities of the plant viru ... | 2014 | 24464790 |
| adaptation to nicotine in the facultative tobacco-feeding hemipteran bemisia tabaci. | plant defensive metabolites such as nicotine can provide barriers to host-range expansion by generalist herbivores. nicotine is one of the most abundant and toxic plant secondary metabolites in nature and is defined by high toxicity to plant-feeding insects. there is significant variation in nicotine tolerance among bemisia tabaci (tobacco whitefly) isolates. some nicotine-tolerant b. tabaci strains can consume 40-fold higher nicotine levels than susceptible strains, and also show cross-resistan ... | 2014 | 24464822 |
| female-biased symbionts and tomato yellow leaf curl virus infections in bemisia tabaci. | the female-biased infection of facultative symbionts has been found in bemisia tabaci; however, whether there are any differences in tomato yellow leaf curl virus (tylcv) and obligate symbiont infection rates between females and males is unknown. determining whether such differences exist would be very important for understanding the spread of the plant virus and of the symbionts. we compared both symbiont infection types, including obligate and facultative symbionts, and the rates of tylcv infe ... | 2014 | 24465416 |
| rna viral metagenome of whiteflies leads to the discovery and characterization of a whitefly-transmitted carlavirus in north america. | whiteflies from the bemisia tabaci species complex have the ability to transmit a large number of plant viruses and are some of the most detrimental pests in agriculture. although whiteflies are known to transmit both dna and rna viruses, most of the diversity has been recorded for the former, specifically for the begomovirus genus. this study investigated the total diversity of dna and rna viruses found in whiteflies collected from a single site in florida to evaluate if there are additional, p ... | 2014 | 24466220 |
| biotype expression and insecticide response of bemisia tabaci chemosensory protein-1. | chemosensory proteins (csps) are a group of small soluble proteins found so far exclusively in arthropod species. these proteins act in chemical communication and perception. in this study, a gene encoding the type 1 csp (btabcsp1) from the agricultural pest bemisia tabaci (whitefly) was analyzed to understand sequence variation and expression specificity in different biotypes. sequence analysis of btabcsp1 showed significant differences between the two genetically characterized biotypes, b and ... | 2014 | 24478049 |
| efficiency of plant induced volatiles in attracting encarsia formosa and serangium japonicum, two dominant natural enemies of whitefly bemisia tabaci in china. | whitefly bemisia tabaci is a globally distributed and most destructive pest to agriculture. owing to increasing chemical resistance, a long-lasting strategy to manage this pest must involve biological control. herbivore-induced plant volatiles (hipvs) usually play a profoundly important role in the foraging behaviour of natural enemies. here, the effects of hipvs from chinese broccoli on the foraging behaviour of two dominant natural enemy species of b. tabaci in china, encarsia formosa and sera ... | 2014 | 24488542 |
| expression and functional characterisation of a soluble form of tomato yellow leaf curl virus coat protein. | tomato yellow leaf curl virus (tylcv), a member of the genus begomovirus within the family geminiviridae, is an important pathogen of tomato in many tropical, subtropical and temperate regions. tylcv is exclusively transmitted by the whitefly bemisia tabaci in a circulative manner. the viral coat protein (cp) has been assumed to play important roles in the entry of tylcv into the insect midgut cells. | 2014 | 24488592 |
| detoxification enzymes of bemisia tabaci b and q: biochemical characteristics and gene expression profiles. | the sweetpotato whitefly, bemisia tabaci (gennadius) (hemiptera: aleyrodidae), is one of the most invasive and destructive pests of field crops worldwide. the sibling species b and q are the two most damaging members of the b. tabaci species complex. that q is more resistant than b to many insecticides has been well documented. over the last decade, q has gradually displaced b and has become the dominant form of b. tabaci in field agricultural systems in most parts of china. to help understand t ... | 2014 | 24488614 |
| dynamics of biotypes b and q of the whitefly bemisia tabaci and its impact on insecticide resistance. | the whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae) is a key pest in many agricultural crops, including vegetables, ornamentals and field crops. b. tabaci is known for its genetic diversity, which is expressed in a complex of biotypes or, as recently suggested, a complex of distinct cryptic species. the biotypes are largely differentiated on the basis of biochemical or molecular polymorphism and differ in characteristics such as host plant range, attraction by natural enemies, secon ... | 2014 | 24488629 |
| expression profiling in bemisia tabaci under insecticide treatment: indicating the necessity for custom reference gene selection. | finding a suitable reference gene is the key for qrt-pcr analysis. however, none of the reference gene discovered thus far can be utilized universally under various biotic and abiotic experimental conditions. in this study, we further examine the stability of candidate reference genes under a single abiotic factor, insecticide treatment. after being exposed to eight commercially available insecticides, which belong to five different classes, the expression profiles of eight housekeeping genes in ... | 2014 | 24498122 |
| a review of the mechanisms and components that determine the transmission efficiency of tomato yellow leaf curl virus (geminiviridae; begomovirus) by its whitefly vector. | begomoviruses are a group of icosahedral single stranded dna viruses exclusively transmitted by the sweet potato whitefly bemisia tabaci in a persistent, circulative manner. in this mode of transmission, begomoviruses are acquired by their insect vector as intact virions from the plant phloem, move along the food canal, foregut and esophagus and reach the midgut where they are absorbed into the hemolymph via the filter chamber. the filter chamber is the site where most of the ingested food is fi ... | 2014 | 24508344 |
| effects of reproductive interference on the competitive displacement between two invasive whiteflies. | reproductive interference is one of the major factors mediating species exclusion among insects. the cryptic species middle east-asia minor 1 (meam1) and mediterranean (med) of the whitefly bemisia tabaci complex have invaded many parts of the world and often exhibit niche overlap and reproductive interference. however, contrasting patterns of competitive displacement between the two invaders have been observed between regions such as those in usa and china. understanding the roles of reproducti ... | 2014 | 24521733 |
| transcriptomic dissection of sexual differences in bemisia tabaci, an invasive agricultural pest worldwide. | sex difference involving chromosomes and gene expression has been extensively documented. in this study, the gender difference in the sweetpotato whitefly bemisia tabaci was investigated using illumina-based transcriptomic analysis. gender-based rnaseq data produced 27 gb reads, and subsequent de novo assembly generated 93,948 transcripts with a n50 of 1,853 bp. a total of 1,351 differentially expressed genes were identified between male and female b. tabaci, and majority of them were female-bia ... | 2014 | 24526031 |
| feeding on a begomovirus-infected plant enhances fecundity via increased expression of an insulin-like peptide in the whitefly, meam1. | the middle east-minor 1 cryptic species (meam1), bemisia tabaci (gennadius) is a globally invasive pest. it spreads widely due to its high fecundity and mutualistic interactions with the virus they vector. feeding on virus (tomato yellow leaf curl china virus, tylccnv)-infected host plants improves their fecundity, however, the key factor regulating the signaling transduction in reproduction of whitefly remains to be identified. here, we cloned a full length cdna encoding an insulin-like peptide ... | 2014 | 24532462 |
| host suitability comparison between the meam1 and asiaii 1 cryptic species of bemisia tabaci in cotton-growing zones of pakistan. | bemisia tabaci is a cryptic species complex. in pakistan, members of the complex, meam1 and asiaii 1, are the predominant species infesting cotton. the biology of the two on cotton, collard, cucumber and tomato was studied. | 2014 | 24535683 |
| plant-mediated whitefly-begomovirus interactions: research progress and future prospects. | plant-mediated interactions between begomoviruses and whiteflies exert important influences on the population dynamics of vectors and the epidemiology of plant diseases. in this article, we synthesize the relevant literature to identify patterns to the interactions. we then review studies on the ecological, biochemical and molecular mechanisms underlying the interactions and finally elaborate on the most interesting issues for future research. the interactions between begomoviruses and the insec ... | 2014 | 24548638 |
| the endosymbiont hamiltonella increases the growth rate of its host bemisia tabaci during periods of nutritional stress. | the whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae) harbors several bacterial symbionts. among the secondary (facultative) symbionts, hamiltonella has high prevalence and high infection frequencies, suggesting that it may be important for the biology and ecology of its hosts. previous reports indicated that hamiltonella increases whitefly fitness and, based on the complete sequencing of its genome, may have the ability to synthesize cofactors and amino acids that are required by its ... | 2014 | 24558462 |
| enhanced whitefly resistance in transgenic tobacco plants expressing double stranded rna of v-atpase a gene. | expression of double strand rna (dsrna) designed against important insect genes in transgenic plants have been shown to give protection against pests through rna interference (rnai), thus opening the way for a new generation of insect-resistant crops. we have earlier compared the efficacy of dsrnas/sirnas, against a number of target genes, for interference in growth of whitefly (bemisia tabaci) upon oral feeding. the v-atpase subunit a (v-atpasea) coding gene was identified as a crucial target. ... | 2014 | 24595215 |
| implication of the bacterial endosymbiont rickettsia spp. in interactions of the whitefly bemisia tabaci with tomato yellow leaf curl virus. | numerous animal and plant viruses are transmitted by arthropod vectors in a persistent, circulative manner. tomato yellow leaf curl virus (tylcv) is transmitted by the sweet potato whitefly bemisia tabaci. we report here that infection with rickettsia spp., a facultative endosymbiont of whiteflies, altered tylcv-b. tabaci interactions. a b. tabaci strain infected with rickettsia acquired more tylcv from infected plants, retained the virus longer, and exhibited nearly double the transmission effi ... | 2014 | 24600010 |
| molecular characterization of soluble and membrane-bound trehalases of the whitefly, bemisia tabaci. | trehalases (tres) have been demonstrated to be the key enzymes that are involved in various trehalose-associated physiological processes in insects. however, little attention has been devoted to the tres in the whitefly, bemisia tabaci. in this study, a soluble tre (bttre-1) and a membrane-bound tre (bttre-2) were cloned in the invasive cryptic species middle east-asia minor 1 (meam1) of the whitefly b. tabaci complex. alignment of deduced amino acids sequences of both bttres revealed that they ... | 2014 | 24610752 |
| begomovirus diversity in tomato crops and weeds in ecuador and the detection of a recombinant isolate of rhynchosia golden mosaic yucatan virus infecting tomato. | viral diseases caused by begomoviruses are of economic importance due to their adverse effects on the production of tropical and subtropical crops. in ecuador, despite reports of significant infestations of bemisia tabaci in the late 1990s, only very recently has a begomovirus, tomato leaf deformation virus (toldev, also present in peru), been reported in tomato. toldev is the first monopartite begomovirus discovered that originated in the americas, and its presence in ecuador highlights the nee ... | 2014 | 24623091 |
| location of symbionts in the whitefly bemisia tabaci affects their densities during host development and environmental stress. | bacterial symbionts often enhance the physiological capabilities of their arthropod hosts and enable their hosts to expand into formerly unavailable niches, thus leading to biological diversification. many arthropods, including the worldwide invasive whitefly bemisia tabaci, have individuals simultaneously infected with symbionts of multiple genera that occur in different locations in the host. this study examined the population dynamics of symbionts that are located in different areas within b. ... | 2014 | 24632746 |
| evidence for rapid spatiotemporal changes in genetic structure of an alien whitefly during initial invasion. | the sweetpotato whitefly bemisia tabaci q species is a recent invader and important pest of agricultural crops in china. this research tested the hypothesis that the q populations that establish in agricultural fields in northern china each year are derived from multiple secondary introductions and/or local populations that overwinter in greenhouses (the pest cannot survive winters in the field in northern china). here, we report the evidence that the q populations in agricultural fields mainly ... | 2014 | 24637851 |
| assessing transmission of crop diseases by insect vectors in a landscape context. | theory indicates that landscape composition affects transmission of vector-borne crop diseases, but few empirical studies have investigated how landscape composition affects plant disease epidemiology. since 2006, bemisia tabaci (gennadius) has vectored the cucurbit yellow stunting disorder virus (cysdv) to cantaloupe and honeydew melons (cucumis melo l.) in the southwestern united states and northern mexico, causing significant reductions in yield of fall melons and increased use of insecticide ... | 2014 | 24665679 |
| rapid spread of a recently introduced virus (tomato yellow leaf curl virus) and its vector bemisia tabaci (hemiptera: aleyrodidae) in liaoning province, china. | in liaoning province, china, tomato yellow leaf curl virus (tylcv) was first detected in 2009 and in only four counties. to quantify the spread of tylcv and to identify potential factors influencing its spread in liaoning province, we assayed for tylcv within 1,055 whiteflies (bemisia tabaci (gennadius) complex) from 74 populations and 29 counties in 2011. the b. tabaci species of these individuals was determined based on molecular markers. tylcv was found in 13 counties (donggang, liaoyang, kaz ... | 2014 | 24665690 |
| fumigant toxicity of summer savory and lemon balm oil constituents and efficacy of spray formulations containing the oils to b- and neonicotinoid-resistant q-biotypes of bemisia tabaci (homoptera: aleyrodidae). | an assessment was made of the fumigant toxicity of 36 constituents from lemon balm oil (lbo) and summer savory oil (sso) and another additional nine previously identified compounds of the oils, as well as of the control efficacy of four experimental spray formulations containing individual oils (0.5 and 0.1% sprays) and spinosad 10% suspension concentrate (sc) to females from b- and neonicotinoid-resistant q-biotypes of bemisia tabaci (gennadius) (homoptera: aleyrodidae). based on 24-h lc50 valu ... | 2014 | 24665712 |
| multilocus approach to clarify species status and the divergence history of the bemisia tabaci (hemiptera: aleyrodidae) species complex. | the sweet potato whitefly, bemisia tabaci, is a highly differentiated species complex. despite consisting of several morphologically indistinguishable entities and frequent invasions on all continents with important associated economic losses, the phylogenetic relationships, species status, and evolutionary history of this species complex is still debated. we sequenced and analyzed one mitochondrial and three single-copy nuclear genes from 9 of the 12 genetic groups of b. tabaci and 5 closely re ... | 2014 | 24685497 |
| nuclear and cytoplasmic differentiation among mediterranean populations of bemisia tabaci: testing the biological relevance of cytotypes. | the taxonomy of the species complex bemisia tabaci is still an unresolved issue. recently, phylogenetic analysis based on mtcoi identified 31 cryptic species. however, mitochondrial diversity is observed within these species, associated with distinct symbiotic bacterial communities forming associations, which here are called cytotypes. the authors investigated the biological significance of two cytotypes (q1 and q2) belonging to the mediterranean species, which have only been found in allopatry ... | 2014 | 24706597 |
| biology and management of bemisia whitefly vectors of cassava virus pandemics in africa. | cassava mosaic disease and cassava brown streak disease are caused by viruses transmitted by bemisia tabaci and affect approximately half of all cassava plants in africa, resulting in annual production losses of more than $us 1 billion. a historical and current bias towards virus rather than vector control means that these diseases continue to spread, and high bemisia populations threaten future virus spread even if the extant strains and species are controlled. progress has been made in parts o ... | 2014 | 24706604 |
| direct and indirect impacts of infestation of tomato plant by myzus persicae (hemiptera: aphididae) on bemisia tabaci (hemiptera: aleyrodidae). | the impacts of infestation by the green peach aphid (myzus persicae) on sweetpotato whitefly (bemisia tabaci) settling on tomato were determined in seven separate experiments with whole plants and with detached leaves through manipulation of four factors: durations of aphid infestation, density of aphids, intervals between aphid removal after different durations of infestation and the time of whitefly release, and leaf positions on the plants. the results demonstrated that b. tabaci preferred to ... | 2014 | 24710393 |
| the immune strategy and stress response of the mediterranean species of the bemisia tabaci complex to an orally delivered bacterial pathogen. | the whitefly, bemisia tabaci, a notorious agricultural pest, has complex relationships with diverse microbes. the interactions of the whitefly with entomopathogens as well as its endosymbionts have received great attention, because of their potential importance in developing novel whitefly control technologies. to this end, a comprehensive understanding on the whitefly defense system is needed to further decipher those interactions. | 2014 | 24722540 |
| the genome of cardinium cbtq1 provides insights into genome reduction, symbiont motility, and its settlement in bemisia tabaci. | many insects harbor inherited bacterial endosymbionts. although some of them are not strictly essential and are considered facultative, they can be a key to host survival under specific environmental conditions, such as parasitoid attacks, climate changes, or insecticide pressures. the whitefly bemisia tabaci is at the top of the list of organisms inflicting agricultural damage and outbreaks, and changes in its distribution may be associated to global warming. in this work, we have sequenced and ... | 2014 | 24723729 |
| genetic structure of the whitefly bemisia tabaci populations in colombia following a recent invasion. | the whitefly bemisia tabaci (gennadius) is one of the most important pests causing economic losses in a variety of cropping systems around the world. this species was recently found in a coastal region of colombia and has now spread inland. to investigate this invasive process, the genetic structure of b. tabaci was examined in 8 sampling locations from 2 infested regions (coastal, inland) using 9 microsatellite markers and the mitochondrial coi gene. the mitochondrial analysis indicated that on ... | 2015 | 24753322 |
| survey on whiteflies and their parasitoids in cassava mosaic pandemic areas of tanzania using morphological and molecular techniques. | bemisia tabaci (gennadius) is the vector of cassava mosaic geminiviruses (cmgs) and cassava brown streak viruses (cbsvs) in africa, which cause devastating yield losses. as a prerequisite to developing biological control methods and enhancing knowledge of the fauna of whitefly parasitoids in sub-saharan africa, endemic parasitoids were surveyed in the cassava-growing regions of tanzania and analysed using both morphological and molecular methods. an attempt was made to corroborate the identifica ... | 2015 | 24753389 |