Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
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| vector and nonvector insect feeding reduces subsequent plant susceptibility to virus transmission. | the interactions of vector-virus-plant have important ecological and evolutionary implications. while the tripartite interactions have received some attention, little is known about whether vector infestation affects subsequent viral transmission and infection. working with the whitefly bemisia tabaci, begomovirus and tobacco/tomato, we demonstrate that pre-infestation of plants by the whitefly vector reduced subsequent plant susceptibility to viral transmission. pre-infestation by the cotton bo ... | 2017 | 28382644 |
| transfer of cry1ac and cry2a proteins from genetically engineered bt cotton to herbivores and predators. | with the cultivation of bt cotton, the produced insecticidal cry proteins are ingested by herbivores and potentially transferred along the food chain to natural enemies, such as predators. in laboratory experiments with bollgard ii cotton, concentrations of cry1ac and cry2ab were measured in lepidoptera larvae (spodoptera littoralis, heliothis virescens), plant bugs (euschistus heros), aphids (aphis gossypii), whiteflies (bemisia tabaci), thrips (thrips tabaci, frankliniella occidentalis), and s ... | 2017 | 28374515 |
| susceptibility of med-q1 and med-q3 biotypes of bemisia tabaci (hemiptera: aleyrodidae) populations to essential and seed oils. | bemisia tabaci (gennadius) (hemiptera: aleyrodidae) is a major pest of many agricultural and ornamental crops in tropical and subtropical regions causing damages that result in important economic losses. insecticides are commonly used in greenhouses or fields to control b. tabaci populations leading to rapid evolution of resistance that render treatments inefficient. therefore, and for environmental and human health concerns, other approaches must be developed for this pest management. in the pr ... | 2017 | 28369577 |
| new putative cryptic species detection and genetic network analysis of bemisia tabaci (hempitera: aleyrodidae) in china based on mitochondrial coi sequences. | the whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae) is a cryptic species complex and widely distributed throughout tropical and subtropical regions. to understand the b. tabaci cryptic species diversity in china more comprehensively, in the year 2014 and 2016, a large-scale sampling was conducted from the famous biodiversity hotspot of china, yunnan province. mitochondrial cytochrome oxidase i gene sequences were used to identify new putative cryptic species. phylogenetic analyses w ... | 2017 | 28366102 |
| the involvement of heat shock proteins in the establishment of tomato yellow leaf curl virus infection. | tomato yellow leaf curl virus (tylcv), a begomovirus, induces protein aggregation in infected tomatoes and in its whitefly vector bemisia tabaci. the interactions between tylcv and hsp70 and hsp90 in plants and vectors are necessity for virus infection to proceed. in infected host cells, hsp70 and hsp90 are redistributed from a soluble to an aggregated state. these aggregates contain, together with viral dna/proteins and virions, hsps and components of the protein quality control system such as ... | 2017 | 28360921 |
| odor, not performance, dictates bemisia tabaci's selection between healthy and virus infected plants. | although, insect herbivores are generally thought to select hosts that favor the fitness of their progeny, this "mother-knows-best" hypothesis may be challenged by the presence of a plant virus. our previous study showed that the whitefly, bemisia tabaci, the obligate vector for transmitting tomato yellow leaf curl virus (tylcv), preferred to settle and oviposit on tylcv-infected rather than healthy host plant, datura stramonium. the performances of b. tabaci larvae and adults were indeed improv ... | 2017 | 28360861 |
| cooperative metabolism in a three-partner insect-bacterial symbiosis revealed by metabolic modeling. | an important factor determining the impact of microbial symbionts on their animal host is the balance between the cost of nutrients consumed by the symbionts and benefit of nutrients released back to the host, but the quantitative significance of nutrient exchange in symbioses involving multiple microbial partners has rarely been addressed. in this study on the association between two intracellular bacterial symbionts, portiera aleyrodidarum and hamiltonella defensa, and their animal host, the w ... | 2017 | 28348026 |
| flupyradifurone effectively manages whitefly bemisia tabaci med (hemiptera: aleyrodidae) and tomato yellow leaf curl virus (tylcv) in tomato. | the cotton whitefly bemisia tabaci (gennadius) is among the most important pests of numerous crops and a vector of >100 plant viruses, causing significant crop losses worldwide. managing the pest as well as inhibiting the transmission of major viruses such as tomato yellow leaf curl virus (tylcv) is of utmost importance for sustainable yields. the efficacy on both whiteflies and virus transmission of the novel systemic butenolide insecticide flupyradifurone, was investigated in this study. | 2017 | 28345196 |
| field evaluation of cucurbit yellow stunting disorder virus transmission by bemisia tabaci. | cucurbit yellow stunting disorder virus (cysdv) is a whitefly-transmitted crinivirus (closteroviridae) that impacts melon production in many parts of the world including the usa. it has been responsible for melon crop loss in the southwestern u.s. since 2006 when it was first identified. control strategies have revolved mainly around chemical control, but research to identify suitable products and approaches to implementing them has lagged. the current study investigated the performance of four ... | 2017 | 28342998 |
| mini tomato genotypes resistant to the silverleaf whitefly and to two-spotted spider mites. | the mini tomato production has expanded, becoming an amazing alternative for enterprise. despite all commercial potential, the cultivation has the occurrence of pests as main obstacle during the crop development. nowadays, there are no researches that aimed obtaining genotypes with high acylsugar content, capable of providing a broad-spectrum resistance to pests. this study aimed the selection of mini tomato genotypes, with high acylsugar content, and checking the resistance level to the silverl ... | 2017 | 28340275 |
| insecticidal effects on the spatial progression of tomato yellow leaf curl virus and movement of its whitefly vector in tomato. | commercial management of whitefly-transmitted tomato yellow leaf curl virus (tylcv) typically relies on insecticide control of whitefly vectors as a first line of defense. we quantified this effect in crop tunnel studies, with validation in a tomato field setting. tomato yellow leaf curl virus-infected and bemisia tabaci (gennadius)-infested source plants were planted at the beginning of tunneled rows to serve as inoculum source, so that movement of whiteflies and tylcv symptoms could be tracked ... | 2017 | 28334339 |
| field-evolved resistance of bemisia tabaci (hemiptera: aleyrodidae) to carbodiimide and neonicotinoids in pakistan. | the evolution of resistance to carbodiimide (a toxic metabolite of diafenthiuron) and four neonicotinoids imidacloprid, acetamiprid, thiamethoxam, and thiacloprid in the pakistani populations of sweetpotato whitefly (bemisia tabaci gennadius) was monitored from 1996 to 2015 using a leaf-dip bioassay. diafenthiuron, imidacloprid, and acetamiprid were introduced into pakistani agriculture in mid-1990s and heavily used since then, because b. tabaci resistance and consequently control failures to co ... | 2017 | 28334290 |
| resistance monitoring for eight insecticides on the sweetpotato whitefly (hemiptera: aleyrodidae) in china. | the sweetpotato whitefly, bemisia tabaci (gennadius), is an important pest of many crops worldwide. because control of b. tabaci still depends on the application of insecticides in china, monitoring the insecticide resistance of b. tabaci populations is essential for achieving control and for managing resistance. in this study, field populations of b. tabaci on vegetables were collected in three regions of china in 2011, 2012, and 2013. the resistance of these populations (all of which were dete ... | 2017 | 28334168 |
| genome sequencing of the sweetpotato whitefly bemsia tabaci med/q. | the sweetpotato whitefly bemisia tabaci is a highly destructive agricultural and ornamental crop pest. it damages host plants through both phloem feeding and vectoring plant pathogens. introductions of b. tabaci are difficult to quarantine and eradicate because of its high reproductive rates, broad host plant range, and insecticide resistance. | 2017 | 28327996 |
| selection and validation of reference genes for qrt-pcr analysis during biological invasions: the thermal adaptability of bemisia tabaci med. | the bemisia tabaci mediterranean (med) cryptic species has been rapidly invading to most parts of the world owing to its strong ecological adaptability, which is considered as a model insect for stress tolerance studies under rapidly changing environments. selection of a suitable reference gene for quantitative stress-responsive gene expression analysis based on qrt-pcr is critical for elaborating the molecular mechanisms of thermotolerance. to obtain accurate and reliable normalization data in ... | 2017 | 28323834 |
| localized migration and dispersal by the sweet potato whitefly, bemisia tabaci. | laboratory populations of the sweet potato whitefly, bemisia tabaci, have been shown to consist of both migratory and trivial flying morphs. the behavior of these forms as part of the process of short-range migration was examined under field conditions. insects were marked in a field of melons using fluorescent dust during two consecutive growing seasons. during the first growing season, passive traps used to collect living whiteflies, were placed along 16 equally spaced transects radiating from ... | 1996 | 28307104 |
| phylogenetic relationships among whiteflies in the bemisia tabaci (gennadius) species complex from major cassava growing areas in kenya. | whiteflies, bemisia tabaci (gennadius) are major insect pests that affect many crops such as cassava, tomato, beans, cotton, cucurbits, potato, sweet potato, and ornamental crops. bemisia tabaci transmits viral diseases, namely cassava mosaic and cassava brown streak diseases, which are the main constraints to cassava production, causing huge losses to many small-scale farmers. the aim of this work was to determine the phylogenetic relationships among bemisia tabaci species in major cassava grow ... | 2017 | 28264479 |
| lack of resistance development in bemisia tabaci to isaria fumosorosea after multiple generations of selection. | the emergence of insecticide resistant insect pests is of significant concern worldwide. the whitefly, bemisia tabaci, is an important agricultural pest and has shown incredible resilience developing resistance to a number of chemical pesticides. entomopathogenic fungi such as isaria fumosorosea offer an attractive alternative to chemical pesticides for insect control, and this fungus has been shown to be an effective pathogen of b. tabaci. little is known concerning the potential for the develo ... | 2017 | 28230074 |
| biochemical evaluation of interactions between synergistic molecules and phase i enzymes involved in insecticide resistance in b- and q-type bemisia tabaci (hemiptera: aleyrodidae). | metabolic resistance is an important consideration in the whitefly bemisia tabaci, where an esterase-based mechanism has been attributed to pyrethroid resistance and over-expression of the cytochrome p450, cyp6cm1, has been correlated to resistance to imidacloprid and other neonicotinoids. | 2017 | 28195678 |
| lack of cross-resistance between neonicotinoids and sulfoxaflor in field strains of q-biotype of whitefly, bemisia tabaci, from eastern china. | control of bemisia tabaci has depended primarily and heavily on insecticides, especially neonicotinoids. the novel sulfoximine insecticide sulfoxaflor exhibits high potency against a broad range of sap-feeding insect species, including those resistant to neonicotinoids. the resistance levels of q-biotype b. tabaci field strains collected from 8 locations in eastern china to neonicotinoids and sulfoxaflor were investigated, and single nucleotide polymorphisms (snps) of nicotinic acetylcholine rec ... | 2017 | 28187830 |
| identification and expression profile analysis of odorant binding protein and chemosensory protein genes in bemisia tabaci med by head transcriptome. | odorant binding proteins (obps) and chemosensory proteins (csps) of arthropods are thought to be involved in chemical recognition which regulates pivotal behaviors including host choice, copulation and reproduction. in insects, obps and csps located mainly in the antenna but they have not been systematically characterized yet in bemisia tabaci which is a cryptic species complex and could damage more than 600 plant species. in this study, among the 106,893 transcripts in the head assembly, 8 obps ... | 2017 | 28166541 |
| single basal application of thiacloprid for the integrated management of meloidogyne incognita and bemisia tabaci in tomato crops. | tomato growers commonly face heavy nematode (meloidogyne incognita) and whitefly (b-biotype bemisia tabaci) infestations, and previous studies demonstrated that thiacloprid could be used to control m. incognita and b. tabaci in cucumber. however, the efficacy of a single basal application of thiacloprid to control both pests and its effect on yield in tomato remains unknown. in this study, the potential of thiacloprid application to the soil for the integrated control of m. incognita and b. taba ... | 2017 | 28120937 |
| rna interference-mediated knockdown of the hydroxyacid-oxoacid transhydrogenase gene decreases thiamethoxam resistance in adults of the whitefly bemisia tabaci. | bemisia tabaci has developed a high level of resistance to thiamethoxam, a second generation neonicotinoid insecticide that has been widely used to control this pest. in this study, we investigated whether hydroxyacid-oxoacid transhydrogenase (hot) is involved in resistance to the neonicotinoid insecticide thiamethoxam in the whitefly. we cloned the full-length gene that encodes hot in b. tabaci. its cdna contains a 1428-bp open reading frame encoding 475 amino acid residues. then we evaluated t ... | 2017 | 28117358 |
| dynamics of bemisia tabaci biotypes and insecticide resistance in fujian province in china during 2005-2014. | the whitefly bemisia tabaci (gennadius) is an important agricultural insect pest worldwide. the b and q biotypes are the two most predominant and devastating biotypes prevalent across china. however, there are few studies regarding the occurrence of the q biotype in fujian province, china, where high insecticide resistance has been reported in the b biotype. differences in some biological characteristics between the b and q biotypes, especially insecticide resistance, are considered to affect th ... | 2017 | 28112233 |
| a semipersistent plant virus differentially manipulates feeding behaviors of different sexes and biotypes of its whitefly vector. | it is known that plant viruses can change the performance of their vectors. however, there have been no reports on whether or how a semipersistent plant virus manipulates the feeding behaviors of its whitefly vectors. cucurbit chlorotic yellows virus (ccyv) (genus crinivirus, family closteroviridae) is an emergent plant virus in many asian countries and is transmitted specifically by b and q biotypes of tobacco whitefly, bemisia tabaci (gennadius), in a semipersistent manner. in the present stud ... | 2017 | 28098749 |
| insecticide resistance status in the whitefly, bemisia tabaci genetic groups asia-i, asia-ii-1 and asia-ii-7 on the indian subcontinent. | the present study is a summary of the current level of the insecticide resistance to selected organophosphates, pyrethroids, and neonicotinoids in seven indian field populations of bemisia tabaci genetic groups asia-i, asia-ii-1, and asia-ii-7. susceptibility of these populations was varied with asia-ii-7 being the most susceptible, while asia-i and asia-ii-1 populations were showing significant resistance to these insecticides. the variability of the lc50 values was 7x for imidacloprid and thia ... | 2017 | 28098188 |
| bensulfuron-methyl treatment of soil affects the infestation of whitefly, aphid, and tobacco mosaic virus on nicotiana tabacum. | bensulfuron-methyl (bsm) is widely used in paddy soil for weed control. bsm residue in the soil has been known to inhibit the growth of sensitive crop plants. however, it is unknown whether bsm residue can affect the agrosystem in general. in this study, we have found significant effects of bsm on the infestation of bemisia tabaci, myzus persicae, and tobacco mosaic virus (tmv) in nicotiana tabacum. the soil was treated with bsm before the pest inoculation. the herbicide-treated tobaccos showed ... | 2016 | 28083007 |
| clathrin-mediated endocytosis is involved in tomato yellow leaf curl virus transport across the midgut barrier of its whitefly vector. | tomato yellow leaf curl virus (tylcv) is a begomovirus transmitted by the whitefly bemisia tabaci. the circulative translocation of the virus in the insect is known in its broad line. however, transit of tylcv from the digestive tract into the haemolymph is poorly understood. we studied the involvement of clathrin in this process by disrupting the clathrin-mediated endocytosis and the endosome network using inhibitor feeding, antibody blocking and dsrna silencing. we monitored the quantities of ... | 2017 | 28056414 |
| qualitative and quantitative differences in herbivore-induced plant volatile blends from tomato plants infested by either tuta absoluta or bemisia tabaci. | plants release a variety of volatile organic compounds that play multiple roles in the interactions with other plants and animals. natural enemies of plant-feeding insects use these volatiles as cues to find their prey or host. here, we report differences between the volatile blends of tomato plants infested with the whitefly bemisia tabaci or the tomato borer tuta absoluta. we compared the volatile emission of: (1) clean tomato plants; (2) tomato plants infested with t. absoluta larvae; and (3) ... | 2017 | 28050733 |
| knock down of whitefly gut gene expression and mortality by orally delivered gut gene-specific dsrnas. | control of the whitefly bemisia tabaci (genn.) agricultural pest and plant virus vector relies on the use of chemical insecticides. rna-interference (rnai) is a homology-dependent innate immune response in eukaryotes, including insects, which results in degradation of the corresponding transcript following its recognition by a double-stranded rna (dsrna) that shares 100% sequence homology. in this study, six whitefly 'gut' genes were selected from an in silico-annotated transcriptome library con ... | 2017 | 28045942 |
| natal host plants can alter herbivore competition. | interspecific competition between herbivores is widely recognized as an important determinant of community structure. although researchers have identified a number of factors capable of altering competitive interactions, few studies have addressed the influence of neighboring plant species. if adaptation to/ epigenetic effects of an herbivore's natal host plant alter its performance on other host plants, then interspecific herbivore interactions may play out differently in heterogeneous and homo ... | 2016 | 28030636 |
| dispersal of amblyseius swirskii (acari: phytoseiidae) on high-tunnel bell peppers in presence or absence of polyphagotarsonemus latus (acari: tarsonemidae). | amblyseius swirskiiathias-henriot (acari: phytoseiidae) is a predatory mite used to control thrips (thysanoptera), whiteflies (bemisia tabaci genn., hemiptera: aleyrodidae), and broad mites (bms) (polyphagotarsonemus latus banks, acari: tarsonemidae). dispersal of a. swirskii, using the ornamental pepper "explosive ember" as a banker plant was evaluated for control of bms in high-tunnel peppers. open-canopy plants (5 weeks old) versus closed-canopy plants (10-weeks old) were used to evaluate the ... | 2017 | 28025305 |
| establishment of the cytoplasmic incompatibility-inducing wolbachia strain wmel in an important agricultural pest insect. | the wmel wolbachia strain was known for cytoplasmic incompatibility (ci)-induction and blocking the transmission of dengue. however, it is unknown whether it can establish and induce ci in a non-dipteran host insect. here we artificially transferred wmel from drosophila melanogaster into the whitefly bemisia tabaci. fluorescence in situ hybridisation demonstrated that wmel had successfully transfected the new host. reciprocal crossing was conducted with wmel-transfected and wild-type isofemale l ... | 2016 | 27982076 |
| the draft genome of whitefly bemisia tabaci meam1, a global crop pest, provides novel insights into virus transmission, host adaptation, and insecticide resistance. | the whitefly bemisia tabaci (hemiptera: aleyrodidae) is among the 100 worst invasive species in the world. as one of the most important crop pests and virus vectors, b. tabaci causes substantial crop losses and poses a serious threat to global food security. | 2016 | 27974049 |
| elevated o3 increases volatile organic compounds via jasmonic acid pathway that promote the preference of parasitoid encarsia formosa for tomato plants. | the elevated atmospheric o3 level may change the interactions of plants and insects, which potentially affects direct and indirect plant defences. however, the underlying mechanism of the impact of elevated o3 on indirect plant defence, namely the efficacy of natural enemies, is unclear. here we tested a hypothesis that linked the effects of elevated o3 and whitefly herbivory on tomato volatile releases mediated by the jasmonic acid (ja) pathway with the preferences of parasitoid encarsia formos ... | 2016 | 27968993 |
| plantmediated horizontal transmission of wolbachia between whiteflies. | maternal transmission is the main transmission pathway of facultative bacterial endosymbionts, but phylogenetically distant insect hosts harbor closely related endosymbionts, suggesting that horizontal transmission occurs in nature. here we report the first case of plant-mediated horizontal transmission of wolbachia between infected and uninfected bemisia tabaci asiaii7 whiteflies. after infected whiteflies fed on cotton leaves, wolbachia was visualized, both in the phloem vessels and in some no ... | 2017 | 27935594 |
| small rnas from bemisia tabaci are transferred to solanum lycopersicum phloem during feeding. | the phloem-feeding whitefly bemisia tabaci is a serious pest to a broad range of host plants, including many economically important crops such as tomato. these insects serve as a vector for various devastating plant viruses. it is known that whiteflies are capable of manipulating host-defense responses, potentially mediated by effector molecules in the whitefly saliva. we hypothesized that, beside putative effector proteins, small rnas (srna) are delivered by b. tabaci into the phloem, where the ... | 2016 | 27933079 |
| rnai-mediated mortality of the whitefly through transgenic expression of double-stranded rna homologous to acetylcholinesterase and ecdysone receptor in tobacco plants. | the whitefly bemisia tabaci (genn.) is a pest and vector of plant viruses to crop and ornamental plants worldwide. using rna interference (rnai) to down regulate whitefly genes by expressing their homologous double stranded rnas in plants has great potential for management of whiteflies to reduce plant virus disease spread. using a tobacco rattle virus-derived plasmid for in planta transient expression of double stranded rna (dsrna) homologous to the acetylcholinesterase (ache) and ecdysone rece ... | 2016 | 27929123 |
| a jasmonate-inducible defense trait transferred from wild into cultivated tomato establishes increased whitefly resistance and reduced viral disease incidence. | whiteflies damage tomatoes mostly via the viruses they transmit. cultivated tomatoes lack many of the resistances of their wild relatives. in order to increase protection to its major pest, the whitefly bemisia tabaci and its transmitted tomato yellow leaf curl virus (tylcv), we introgressed a trichome-based resistance trait from the wild tomato solanum pimpinellifolium into cultivated tomato, solanum lycopersicum. the tomato backcross line bc5s2 contains acylsucrose-producing type-iv trichomes, ... | 2016 | 27920785 |
| elevated o₃ and tylcv infection reduce the suitability of tomato as a host for the whitefly bemisia tabaci. | the effects of elevated atmospheric ozone (o₃) levels on herbivorous insects have been well studied, but little is known about the combined effects of elevated o₃ and virus infection on herbivorous insect performance. using open-top chambers in the field, we determined the effects of elevated o₃ and tomato yellow leaf curl virus (tylcv) infection on wild-type (wt) tomato and 35s tomato (jasmonic acid (ja) defense-enhanced genotype) in association with whitefly, bemisia tabaci gennadius biotype b ... | 2016 | 27916792 |
| glutathione s-transferases are involved in thiamethoxam resistance in the field whitefly bemisia tabaci q (hemiptera: aleyrodidae). | the whitefly, bemisia tabaci, has developed a high level of resistance to thiamethoxam, a second generation neonicotinoid insecticide that has been widely used to control this pest. in this study, we assessed the level of cross-resistance, the activities of detoxifying enzymes, and the expression profiles of 23 glutathione s-transferase (gst) genes in a thiamethoxam-resistant ant and -susceptible strain of bemisia tabaci q. the thiamethoxam-resistant strain showed a moderate level of cross-resis ... | 2016 | 27914542 |
| the non-canonical tomato yellow leaf curl virus recombinant that displaced its parental viruses in southern morocco exhibits a high selective advantage in experimental conditions. | recombination events are frequently inferred from the increasing number of sequenced viral genomes, but their impact on natural viral populations has rarely been evidenced. tylcv-is76 is a recombinant (begomovirus,geminiviridae) between the israel strain of tomato yellow leaf curl virus (tylcv-il) and the spanish strain of tomato yellow leaf curl sardinia virus (tylcsv-es) that was generated most probably in the late 1990s in southern morocco (souss). its emergence in the 2000s coincided with th ... | 2016 | 27902403 |
| implication of the whitefly bemisia tabaci cyclophilin b protein in the transmission of tomato yellow leaf curl virus. | tomato yellow leaf curl virus (tylcv) is a single-stranded (ssdna) begomoviruses that causes severe damage to tomato and several other crops worldwide. tylcv is exclusively transmitted by the sweetpotato whitefly, bemisia tabaci in a persistent circulative and propagative manner. previous studies have shown that the transmission, retention, and circulation of tylcv in its vector involves interaction with insect and endosymbiont proteins, which aid in the transmission of the virus, or have a prot ... | 2016 | 27895657 |
| a peptidoglycan recognition protein acts in whitefly (bemisia tabaci) immunity and involves in begomovirus acquisition. | peptidoglycan recognition proteins (pgrps) are multifunctional pattern recognition proteins. here, we report that a pgrp gene, btpgrp, encodes a pgrp from the whitefly bemisia tabaci (meam1) that binds and kills bacteria in vitro. we analyzed btpgrp transcriptional profiling, and the distribution of the cognate protein within the midgut. fungal infection and wasp parasitization induced expression of btpgrp. silencing btpgrp with artificial media amended with dsrna led to reduced expression of a ... | 2016 | 27892529 |
| engineering dual begomovirus-bemisia tabaci resistance in plants. | the whitefly bemisia tabaci is an important pest of many economically important crops and the vector of begomoviruses (family geminiviridae). recently, the expression of insecticidal proteins and/or toxins or double-stranded (ds)rna homologous to b. tabaci genes has been demonstrated to provide the plant with protection against b. tabaci and the viruses that it transmits. | 2017 | 27890609 |
| does plant cultivar difference modify the bottom-up effects of resource limitation on plant-insect herbivore interactions? | variation in resource input to plants triggers bottom-up effects on plant-insect herbivore interactions. however, variation in plant intrinsic traits in response to resource availability may modify the bottom-up effects. furthermore, the consequences also may depend on the feeding strategy of insect herbivores belonging to different feeding guilds. we evaluated the performance of two insect herbivores from distinct feeding guilds, the leaf miner tuta absoluta and the phloem feeder bemisia tabaci ... | 2016 | 27889865 |
| the contrasting effects of elevated co2 on tylcv infection of tomato genotypes with and without the resistance gene, mi-1.2. | elevated atmospheric co2 typically enhances photosynthesis of c3 plants and alters primary and secondary metabolites in plant tissue. by modifying the defensive signaling pathways in host plants, elevated co2 could potentially affect the interactions between plants, viruses, and insects that vector viruses. r gene-mediated resistance in plants represents an efficient and highly specific defense against pathogens and herbivorous insects. the current study determined the effect of elevated co2 on ... | 2016 | 27881989 |
| life-history traits of macrolophus pygmaeus with different prey foods. | macrolophus pygmaeus rambur (hemiptera: miridae) is a generalist predatory mirid widely used in augmentative biological control of various insect pests in greenhouse tomato production in europe, including the invasive tomato leafminer, tuta absoluta (meyrick) (lepidoptera, gelechiidae). however, its biocontrol efficacy often relies on the presence of alternative prey. the present study aimed at evaluating the effect of various prey foods (ephestia kuehniella eggs, bemisia tabaci nymphs, tuta abs ... | 2016 | 27870857 |
| use of the synergist piperonyl butoxide can slow the development of alpha-cypermethrin resistance in the whitefly bemisia tabaci. | the development of insecticide resistance in insect pests of crops is a growing threat to sustainable food production, and strategies that slow the development of resistance are therefore urgently required. the insecticide synergist piperonyl butoxide (pbo) inhibits certain insect detoxification systems and so may delay the evolution of metabolic resistance. in the current study we characterized resistance development in the silverleaf whitefly, bemisia tabaci, after selection with either a neon ... | 2017 | 27869336 |
| effects of foliar and systemic insecticides on whitefly transmission and incidence of cucurbit yellow stunting disorder virus. | cucurbit yellow stunting disorder virus (cysdv) is a cosmopolitan viral disease transmitted by bemisia tabaci that infects cucurbit crops. cantaloupe production in the southwestern usa has been confronted by epidemics of cysdv since 2006 when it was first identified in arizona and california. as a phloem-limited virus that is vectored in a semi-persistent manner by b. tabaci, cysdv has transmission characteristics that may be suppressed by select insecticide applications. | 2016 | 27862891 |
| global population structure of a worldwide pest and virus vector: genetic diversity and population history of the bemisia tabaci sibling species group. | the whitefly bemisia tabaci sibling species (sibsp.) group comprises morphologically indiscernible lineages of well-known exemplars referred to as biotypes. it is distributed throughout tropical and subtropical latitudes and includes the contemporary invasive haplotypes, termed b and q. several well-studied b. tabaci biotypes exhibit ecological and biological diversity, however, most members are poorly studied or completely uncharacterized. genetic studies have revealed substantial diversity wit ... | 2016 | 27855173 |
| the complete mitochondrial genome of aleurocanthus camelliae: insights into gene arrangement and genome organization within the family aleyrodidae. | there are numerous gene rearrangements and transfer rna gene absences existing in mitochondrial (mt) genomes of aleyrodidae species. to understand how mt genomes evolved in the family aleyrodidae, we have sequenced the complete mt genome of aleurocanthus camelliae and comparatively analyzed all reported whitefly mt genomes. the mt genome of a. camelliae is 15,188 bp long, and consists of 13 protein-coding genes, two rrna genes, 21 trna genes and a putative control region (genbank: ku761949). the ... | 2016 | 27827992 |
| direct evidence for the semipersistent transmission of cucurbit chlorotic yellows virus by a whitefly vector. | cucurbit chlorotic yellows virus (ccyv) (genus crinivirus, family closteroviridae) is an emerging plant virus, and is now spreading and causing severe economic losses to cucurbit crops in many asian countries. ccyv is believed to be transmitted specifically by the sweetpotato whitefly, bemisia tabaci, in a semipersistent manner. in the present study, we provide direct evidence for the semipersistent transmission of ccyv by mediterranean (med) cryptic species of b. tabaci complex. we investigated ... | 2016 | 27812032 |
| rna interference of an antimicrobial peptide, btdef, reduces tomato yellow leaf curl china virus accumulation in the whitefly bemisia tabaci. | the whitefly bemisia tabaci (gennadius) is considered one of the main pests for agriculture. one important problem with the whitefly is its notorious status as a vector for plant viruses, primarily begomoviruses. we have previously identified a defensin-like antimicrobial peptide, btdef, from the whitefly b. tabaci meam1. however, the function of btdef in the immune system of the insect vector and begomovirus transmission has yet to be explored. | 2016 | 27804213 |
| high ozone (o3) affects the fitness associated with the microbial composition and abundance of q biotype bemisia tabaci. | ozone (o3) affects the fitness of an insect, such as its development, reproduction and protection against fungal pathogens, but the mechanism by which it does so remains unclear. here, we compared the fitness (i.e., the growth and development time, reproduction and protection against beauveria bassiana (b. bassiana) of q biotype whiteflies fumigated under ho3 (280 ± 20 ppb) and control o3 (50 ± 10 ppb) concentrations. moreover, we determined that gene expression was related to development, repro ... | 2016 | 27799921 |
| antioxidant enzyme responses induced by whiteflies in tobacco plants in defense against aphids: catalase may play a dominant role. | bemisia tabaci meam1 (middle east-asia minor 1) feeding alters antioxidative enzyme activity in some plant species. infestation of b. tabaci nymphs decreases myzus persicae performance on systemic, but not local leaves of tobacco plants. however, it is unclear if b. tabaci nymphs induced antioxidant activities contributing to the aphid resistance. | 2016 | 27788203 |
| susceptibility of bemisia tabaci meam1 (hemiptera: aleyrodidae) to imidacloprid, thiamethoxam, dinotefuran and flupyradifurone in south florida. | populations of bemisa tabaci meam1 were established from nineteen locations in south florida, primarily from commercial tomato fields, and were tested using a cotton leaf petiole systemic uptake method for susceptibility to the nicotinic acetylcholine agonist insecticides imidacloprid, thiamethoxam, dinotefuran and flupyradifurone. eleven populations produced lc50s for one or more chemicals that were not significantly different from the susceptible laboratory colony based on overlapping fiducial ... | 2016 | 27775597 |
| host nuclear genotype influences phenotype of a conditional mutualist symbiont. | arthropods commonly carry maternally inherited intracellular bacterial symbionts that may profoundly influence host biology and evolution. the intracellular symbiont rickettsia sp. nr. bellii swept rapidly into populations of the sweetpotato whitefly bemisia tabaci in the south-western usa. previous laboratory experiments showed female-bias and fitness benefits were associated with rickettsia infection, potentially explaining the high frequencies of infection observed in field populations, but t ... | 2017 | 27748992 |
| effects of three insect growth regulators on encarsia formosa (hymenoptera: aphelinidae), an endoparasitoid of bemisia tabaci (hemiptera: aleyrodidae). | insect growth regulators (igrs) disrupt the normal activity of the endocrine or hormone system of insects, affecting the development, reproduction, or metamorphosis of the target insects, and normally causing less detrimental effects to beneficial insects. the effects of three igrs (pyriproxyfen, fenoxycarb, and buprofezin) on encarsia formosa gahan, an endoparasitoid of whiteflies, were determined using b. tabaci as a host. we assessed the effects of the igrs on parasitoid's larval development, ... | 2016 | 27744284 |
| differing behavioural responses of bemisia tabaci meam1 and med to cabbage damaged by conspecifics and heterospecifics. | the whitefly bemisia tabaci is a serious pest with an extensive host range. previous research has shown that b. tabaci is a species complex with many cryptic species or biotypes and that the two most important species are meam1 (middle east-minor asia 1) and med (mediterranean genetic group). meam1 and med are known to differ in their preference for cabbage, brassica oleracea, as a host plant, however, the mechanism underlying this preference is unknown. in the current study, a host choice exper ... | 2016 | 27731417 |
| members of wrky group iii transcription factors are important in tylcv defense signaling pathway in tomato (solanum lycopersicum). | transmitted by the whitefly bemisia tabaci, tomato yellow leaf curly virus (tylcv) has posed serious threats to plant growth and development. plant innate immune systems against various threats involve wrky group iii transcription factors (tfs). this group participates as a major component of biological processes in plants. | 2016 | 27717312 |
| effects of isaria fumosorosea on tylcv (tomato yellow leaf curl virus) accumulation and transmitting capacity of bemisia tabaci. | tomato yellow leaf curl virus (tylcv) is transmitted by the bemisia tabaci pest middle east-asia minor 1 (meam1) in china. isaria fumosorosea is a fungal pathogen of b. tabaci. however, the effects of fungal infection on tylcv expression and transmission by meam1 are unclear. in this study, potted tomatoes containing second instar nymphs of meam1 were treated with i. fumosorosea ifb01 strain and the relationship between fungal infection in meam1 and its tylcv transmission capacity was investigat ... | 2016 | 27716852 |
| recombinant fungal entomopathogen rnai target insect gene. | rna interference (rnai) technology is considered as an alternative for control of pests. however, rnai has not been used in field conditions yet, since delivering exogenous ds/sirna to target pests is very difficult. the laboratory methods of introducing the ds/sirna into insects through feeding, micro feeding / dripping and injecting cannot be used in fields. transgenic crop is perhaps the most effective application of rnai for pest control, but it needs long-time basic researches in order to r ... | 2016 | 27715447 |
| a transgenic approach to control hemipteran insects by expressing insecticidal genes under phloem-specific promoters. | the first generation transgenic crops used strong constitutive promoters for transgene expression. however, tissue-specific expression is desirable for more precise targeting of transgenes. moreover, piercing/sucking insects, which are generally resistant to insecticidal bacillus thuringiensis (bt) proteins, have emerged as a major pests since the introduction of transgenic crops expressing these toxins. phloem-specific promoters isolated from banana bunchy top virus (bbtv) were used for the exp ... | 2016 | 27708374 |
| how to start with a clean crop: biopesticide dips reduce populations of bemisia tabaci (hemiptera: aleyrodidae) on greenhouse poinsettia propagative cuttings. | (1) global movement of propagative plant material is a major pathway for introduction of bemisia tabaci (hemiptera: aleyrodidae) into poinsettia greenhouses. starting a poinsettia crop with high pest numbers disrupts otherwise successful biological control programs and widespread resistance of b. tabaci against pesticides is limiting growers' options to control this pest; (2) this study investigated the use of several biopesticides (mineral oil, insecticidal soap, beauveria bassiana, isaria fumo ... | 2016 | 27681741 |
| performance of bemisia tabaci biotype b on soybean genotypes. | bemisia tabaci (genn.) (hemiptera: aleyrodidae) has been recognized as an important pest of many agricultural systems including soybean [glycine max (l.) merrill] crops. as an alternative to chemical control, the use of resistant genotypes represents an important tool for integrated pest management (ipm). this study aimed to evaluate the biological development of bemisia tabaci biotype b confined on 13 soybean genotypes under greenhouse conditions. initially, the nymphal period, complete develop ... | 2017 | 27653045 |
| wolbachia has two different localization patterns in whitefly bemisia tabaci asiaii7 species. | the whitefly bemisia tabaci is a cosmopolitan insect species complex that harbors the obligate primary symbiont portiera aleyrodidarum and several facultative secondary symbionts including wolbachia, which have diverse influences on the host biology. here, for the first time, we revealed two different localization patterns of wolbachia present in the immature and adult stages of b. tabaci asiaii7 cryptic species. in the confined pattern, wolbachia was restricted to the bacteriocytes, while in th ... | 2016 | 27611575 |
| expression of an insecticidal fern protein in cotton protects against whitefly. | whitefly (bemisia tabaci) damages field crops by sucking sap and transmitting viral diseases. none of the insecticidal proteins used in genetically modified (gm) crop plants to date are effective against whitefly. we report the identification of a protein (tma12) from an edible fern, tectaria macrodonta (fee) c. chr., that is insecticidal to whitefly (median lethal concentration = 1.49 μg/ml in in vitro feeding assays) and interferes with its life cycle at sublethal doses. transgenic cotton line ... | 2016 | 27598229 |
| herbivore damage and prior egg deposition on host plants influence the oviposition of the generalist moth trichoplusia ni (lepidoptera: noctuidae). | female insects have the difficult task of locating host plants that maximize the survival and success of their offspring. in this study, the oviposition preferences of the cabbage looper moth, trichoplusia ni (hübner), for soybean plants, glycine max (l.), under various treatments-undamaged, mechanically damaged, damaged by t. ni or spodoptera frugiperda (smith) larvae or by bemisia tabaci (gennadius) adults, egg-free plants, and plants previously oviposited by conspecific or heterospecific fema ... | 2016 | 27591288 |
| status of resistance of bemisia tabaci (hemiptera: aleyrodidae) to neonicotinoids in iran and detoxification by cytochrome p450-dependent monooxygenases. | nine bemisia tabaci (gennadius) populations were collected from different regions of iran. in all nine populations, only one biotype (b biotype) was detected. susceptibilities of these populations to imidacloprid and acetamiprid were assayed. the lethal concentration 50 values (lc50) for different populations showed a significant discrepancy in the susceptibility of b. tabaci to imidacloprid (3.76 to 772.06 mg l(-1)) and acetamiprid (4.96 to 865 mg l(-1)). the resistance ratio of the populations ... | 2017 | 27590026 |
| do nymphs and adults of three neotropical zoophytophagous mirids damage leaves and fruits of tomato? | the predators macrolophus basicornis (stal), engytatus varians (distant) and campyloneuropsis infumatus (carvalho) consume large numbers of tomato pests such as bemisia tabaci (gennadius) and tuta absoluta (meyrick). however, they are zoophytophagous and feed on plant parts as well. we evaluated the type and effect of injury caused by nymphs and adults of these mirids on tomato seedlings and fruit in the absence of prey. for each mirid species, seedlings were exposed to groups of 20 nymphs or ad ... | 2017 | 27573581 |
| tomato infection by whitefly-transmitted circulative and non-circulative viruses induce contrasting changes in plant volatiles and vector behaviour. | virus infection frequently modifies plant phenotypes, leading to changes in behaviour and performance of their insect vectors in a way that transmission is enhanced, although this may not always be the case. here, we investigated bemisia tabaci response to tomato plants infected by tomato chlorosis virus (tocv), a non-circulative-transmitted crinivirus, and tomato severe rugose virus (tosrv), a circulative-transmitted begomovirus. moreover, we examined the role of visual and olfactory cues in ho ... | 2016 | 27529271 |
| projecting pest population dynamics under global warming: the combined effect of inter- and intra-annual variations. | the typical short generation length of insects makes their population dynamics highly sensitive not only to mean annual temperatures but also to their intra-annual variations. to consider the combined effect of both thermal factors under global warming, we propose a modeling framework that links general circulation models (gcms) with a stochastic weather generator and population dynamics models to predict species population responses to inter- and intra-annual temperature changes. this framework ... | 2016 | 27509758 |
| molecular and functional characterization of bemisia tabaci aquaporins reveals the water channel diversity of hemipteran insects. | the middle east-asia minor 1 (meam1) whitefly, bemisia tabaci (gennadius) is an economically important pest of food, fiber, and ornamental crops. this pest has evolved a number of adaptations to overcome physiological challenges, including 1) the ability to regulate osmotic stress between gut lumen and hemolymph after imbibing large quantities of a low nitrogen, sugar-rich liquid diet; 2) the ability to avoid or prevent dehydration and desiccation, particularly during egg hatching and molting; a ... | 2016 | 27491441 |
| tomato yellow leaf curl virus: no evidence for replication in the insect vector bemisia tabaci. | begomovirus ssdna plant virus (family geminiviridae) replication within the bemisia tabaci vector is controversial. transovarial transmission, alteration to whitefly biology, or detection of viral transcripts in the vector are proposed as indirect evidence of replication of tomato yellow leaf curl virus (tylcv). recently, contrasting direct evidence has been reported regarding the capacity of tylcv to replicate within individuals of b. tabaci based on quantitave pcr approaches. time-course exper ... | 2016 | 27476582 |
| stage-related defense response induction in tomato plants by nesidiocoris tenuis. | the beneficial effects of direct predation by zoophytophagous biological control agents (bcas), such as the mirid bug nesidiocoris tenuis, are well-known. however, the benefits of zoophytophagous bcas' relation with host plants, via induction of plant defensive responses, have not been investigated until recently. to date, only the females of certain zoophytophagous bcas have been demonstrated to induce defensive plant responses in tomato plants. the aim of this work was to determine whether nym ... | 2016 | 27472328 |
| the whitefly bemisia tabaci knottin-1 gene is implicated in regulating the quantity of tomato yellow leaf curl virus ingested and transmitted by the insect. | the whitefly bemisia tabaci is a major pest to agricultural crops. it transmits begomoviruses, such as tomato yellow leaf curl virus (tylcv), in a circular, persistent fashion. transcriptome analyses revealed that b. tabaci knottin genes were responsive to various stresses. upon ingestion of tomato begomoviruses, two of the four knottin genes were upregulated, knot-1 (with the highest expression) and knot-3. in this study, we examined the involvement of b. tabaci knottin genes in relation to tyl ... | 2016 | 27455309 |
| infectivity, effects on helper viruses and whitefly transmission of the deltasatellites associated with sweepoviruses (genus begomovirus, family geminiviridae). | begomoviruses (family geminiviridae) are whitefly-transmitted viruses with single-stranded dna genomes that are frequently associated with dna satellites. these satellites include non-coding satellites, for which the name deltasatellites has been proposed. although the first deltasatellite was identified in the late 1990s, little is known about the effects they have on infections of their helper begomoviruses. recently a group of deltasatellites were identified associated with sweepoviruses, a g ... | 2016 | 27453359 |
| synthesis and biological activity of a new class of insecticides: the n-(5-aryl-1,3,4-thiadiazol-2-yl)amides. | optimization studies on a high-throughput screening (hts) hit led to the discovery of a series of n-(6-arylpyridazin-3-yl)amides with insecticidal activity. it was hypothesized that the isosteric replacement of the pyridazine ring with a 1,3,4-thiadiazole ring could lead to more potent biological activity and/or a broader sap-feeding pest spectrum. the resulting n-(5-aryl-1,3,4-thiadiazol-2-yl)amides were explored as a new class of insecticides. | 2017 | 27414747 |
| pro-insecticidal approach towards increasing in planta activity. | the adrenergic mode of action was investigated for the development of potential new insecticides. clonidine-related analogs were tested against myzus persicae (sulzer) and bemisia tabaci (gennadius). clonidine analogs lack translation owing to a possible vacuole-trapping mechanism. physical property modulation via a prodrug approach was attempted to overcome this mechanism. | 2017 | 27414472 |
| transmission of squash vein yellowing virus to and from cucurbit weeds and effects on sweetpotato whitefly (hemiptera: aleyrodidae) behavior. | since 2003, growers of florida watermelon [citrullus lanatus (thunb.) matsum. and nakai] have periodically suffered large losses from a disease caused by squash vein yellowing virus (sqvyv), which is transmitted by the whitefly middle east-asia minor 1 (meam1), formerly bemisia tabaci (gennadius) biotype b. common cucurbit weeds like balsam apple (momordica charantia l.) and smellmelon [cucumis melo var. dudaim (l.) naud.] are natural hosts of sqvyv, and creeping cucumber (melothria pendula l.) ... | 2016 | 27400705 |
| deciphering the biology of deltasatellites from the new world: maintenance by new world begomoviruses and whitefly transmission. | deltasatellites are small noncoding dna satellites associated with begomoviruses. the study presented here has investigated the biology of two deltasatellites found in wild malvaceous plants in the new world (nw). infectious clones of two nw deltasatellites (from malvastrum coromandelianum and sidastrum micranthum) and associated begomoviruses were constructed. infectivity in nicotiana benthamiana and their natural malvaceous hosts was assessed. the nw deltasatellites were not able to spread aut ... | 2016 | 27400152 |
| presence of native prey does not divert predation on exotic pests by harmonia axyridis in its indigenous range. | in china, two invasive pests, bemisia tabaci meam1 (gennadius) and frankliniella occidentalis (pergande), often co-occur with the native pest, aphis gossypii (glover), on plants of malvaceae and cucurbitaceae. all three are preyed on by the native ladybird, harmonia axyridis (pallas); however, the native predator might be expected to prefer native prey to the exotic ones due to a shared evolutionary past. in order to clarify whether the presence of native prey affected the consumption of these t ... | 2016 | 27391468 |
| insecticidal activity of novel thioureas and isothioureas. | we hypothesized that the exploration of chemical space around compounds with reported insecticidal activity could be a viable strategy for discovering novel, insecticidally active areas of chemistry. | 2017 | 27391046 |
| the salicylic acid-mediated release of plant volatiles affects the host choice of bemisia tabaci. | the whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae) causes serious crop losses worldwide by transmitting viruses. we have previously shown that salicylic acid (sa)-related plant defenses directly affect whiteflies. in this study, we applied exogenous sa to tomato plants in order to investigate the interaction between sa-induced plant volatiles and nonviruliferous b. tabaci b and q or b- and q-carrying tomato yellow leaf curl virus (tylcv). the results showed that exogenous sa caused ... | 2016 | 27376280 |
| cellular and molecular remodelling of a host cell for vertical transmission of bacterial symbionts. | various insects require intracellular bacteria that are restricted to specialized cells (bacteriocytes) and are transmitted vertically via the female ovary, but the transmission mechanisms are obscure. we hypothesized that, in the whitefly bemisia tabaci, where intact bacteriocytes (and not isolated bacteria) are transferred to oocytes, the transmission mechanism would be evident as cellular and molecular differences between the nymph (pre-adult) and adult bacteriocytes. we demonstrate dramatic ... | 2016 | 27358364 |
| two new species of eretmocerus haldeman (hymenoptera: aphelinidae) parasitizing aleurolobus rhododendri takahashi and dialeuropora decempunctata (quaintance & baker) (hemiptera: aleyrodidae) from taiwan. | species of eretmocerus haldeman develop as primary ecto-endoparasites of whiteflies (rose and rosen 1992). currently, the genus eretmocerus comprises 86 species worldwide, of which 11 species have been previously recorded from taiwan (shih et al. 2015). despite having been recently revised for taiwan, two new species are here added to the taiwan fauna. | 2016 | 27346951 |
| deep sequencing-based transcriptome analysis reveals the regulatory mechanism of bemisia tabaci (hemiptera: aleyrodidae) nymph parasitized by encarsia sophia (hymenoptera: aphelinidae). | the whitefly bemisia tabaci is a genetically diverse complex with multiple cryptic species, and some are the most destructive invasive pests of many ornamentals and crops worldwide. encarsia sophia is an autoparasitoid wasp that demonstrated high efficiency as bio-control agent of whiteflies. however, the immune mechanism of b. tabaci parasitization by e. sophia is unknown. in order to investigate immune response of b. tabaci to e. sophia parasitization, the transcriptome of e. sophia parasitize ... | 2016 | 27332546 |
| mixed release of two parasitoids and a polyphagous ladybird as a potential strategy to control the tobacco whitefly bemisia tabaci. | a mixed species release of parasitoids is used to suppress outbreaks of tobacco whitefly, bemisia tabaci (hemiptera: aleyrodidae); however, this biocontrol may be inhibited by interspecific interactions. we investigated the effects of mixed releases of natural enemies of b. tabaci on predation rates, parasite performance and adult parasitoid emergence under greenhouse conditions. we tested the polyphagous predatory ladybird harmonia axyridis (coleoptera: coccinellidae) and two whitefly-specific ... | 2016 | 27312174 |
| the autophagy pathway participates in resistance to tomato yellow leaf curl virus infection in whiteflies. | macroautophagy/autophagy plays an important role against pathogen infection in mammals and plants. however, little has been known about the role of autophagy in the interactions of insect vectors with the plant viruses, which they transmit. begomoviruses are a group of single-stranded dna viruses and are exclusively transmitted by the whitefly bemisia tabaci in a circulative manner. in this study, we found that the infection of a begomovirus, tomato yellow leaf curl virus (tylcv) could activate ... | 2016 | 27310765 |
| sequencing and comparison of the rickettsia genomes from the whitefly bemisia tabaci middle east asia minor i. | the whitefly, bemisia tabaci, harbors the primary symbiont 'candidatus portiera aleyrodidarum' and a variety of secondary symbionts. among these secondary symbionts, rickettsia is the only one that can be detected both inside and outside the bacteriomes. infection with rickettsia has been reported to influence several aspects of the whitefly biology, such as fitness, sex ratio, virus transmission and resistance to pesticides. however, mechanisms underlying these differences remain unclear, large ... | 2016 | 27273750 |
| development of an antibody-based diagnostic method for the identification of bemisia tabaci biotype b. | the whitefly bemisia tabaci is a very destructive pest. b. tabaci is composed of various morphologically undistinguishable biotypes, among which biotypes b and q, in particular, draw attention because of their wide distribution in korea and differential potentials for insecticide resistance development. to develop a biotype-specific protein marker that can readily distinguishes biotypes b from other biotypes in the field, we established an elisa protocol based on carboxylesterase 2 (coe2), which ... | 2016 | 27265822 |
| evaluation of bioinsecticides for management of bemisia tabaci (hemiptera: aleyrodidae) and the effect on the whitefly predator delphastus catalinae (coleoptera: coccinellidae) in organic squash. | organic zucchini squash is a high-value vegetable crop in florida and potential exists to expand its production throughout the state. a lack of knowledge on the effectiveness of organic products and their integration with natural enemies is an important constraint to the regulation of pest populations in organic squash production in florida. the objectives of this study were to evaluate the effect of insecticides labeled for organic production that can be used for management of bemisia tabaci (g ... | 2016 | 27247302 |
| improved shelf life of dried beauveria bassiana blastospores using convective drying and active packaging processes. | the yeast form (blastospore) of the dimorphic insect-pathogenic fungus beauveria bassiana can be rapidly produced using liquid fermentation methods but is generally unable to survive rapid dehydration processes or storage under non-refrigerated conditions. in this study, we evaluated the influence of two convective drying methods, various modified atmosphere packaging systems, and storage temperatures on the desiccation tolerance, storage stability, and virulence of blastospores of b. bassiana e ... | 2016 | 27198727 |
| performance of bemisia tabaci (genn.) biotype b (hemiptera: aleyrodidae) on weeds. | bemisia tabaci (genn.) biotype b (hemiptera: aleyrodidae) is regarded as a pest with a large number of hosts, including crops and weeds. the performance of this whitefly on seven weeds was evaluated in order to identify the most suitable host. the following weeds that are very common in intense agricultural areas in the state of são paulo, brazil, were selected for this study: spurge (euphorbia heterophylla), beggarticks (bidens pilosa), red tasselflower (emilia sonchifolia), small-flower galins ... | 2014 | 27194066 |
| tomato yellow leaf curl virus benefits population growth of the q biotype of bemisia tabaci (gennadius) (hemiptera: aleyrodidae). | plant viruses can directly influence their insect vectors, and indirectly through their shared host plant, altering their behavior and performance in a mutualistic or rather antagonistic manner. one of the most studied begomovirus, tomato yellow leaf curl virus (tylcv), may also facilitate the expansion of its vector, the whitefly bemisia tabaci (gennadius). considering the likely expansion of the disease and its major vector, we studied the direct and the indirect effects of a mediterranean iso ... | 2014 | 27193818 |
| records of natural enemies of bemisia tabaci (genn.) (hemiptera: aleyrodidae) biotype b in brazil. | collections of natural enemies of bemisia tabaci biotype b (genn.) (hemiptera: aleyrodidae) were made in lavras, state of minas gerais, brazil. in the greenhouse, 6,495 predators and 16,628 parasitoids belonging to three families were collected. in the field, 267 predators and 344 parasitoids belonging to five families were found. for the first time in brazil, five species of predators associated with this whitefly were reported. because of the diversity of natural enemies of b. tabaci biotype b ... | 2014 | 27193527 |
| acyl sugars and whitefly (bemisia tabaci) resistance in segregating populations of tomato genotypes. | the wild tomato, solanum pennellii, is an important source of resistance genes against tomato pests. this resistance is due to the presence of acyl sugars (as), which are allelochemicals that have negative effects on arthropod pests. there are no commercially available tomato cultivars that exhibit significant levels of resistance to arthropod pests. therefore, this study evaluated resistance to whitefly (bemisia tabaci) in f2 and f2rc1 tomato genotypes with high as levels from a cross between s ... | 2016 | 27173206 |
| biotype characterization, developmental profiling, insecticide response and binding property of bemisia tabaci chemosensory proteins: role of csp in insect defense. | chemosensory proteins (csps) are believed to play a key role in the chemosensory process in insects. sequencing genomic dna and rna encoding csp1, csp2 and csp3 in the sweet potato whitefly bemisia tabaci showed strong variation between b and q biotypes. analyzing csp-rna levels showed not only biotype, but also age and developmental stage-specific expression. interestingly, applying neonicotinoid thiamethoxam insecticide using twenty-five different dose/time treatments in b and q young adults s ... | 2016 | 27167733 |
| insect stings to change gear for healthy plant: improving maize drought tolerance by whitefly infestation. | since plants first appeared about 1.1 billion years ago, they have been faced with biotic and abiotic stresses in their environment. to overcome these stresses, plants developed defense strategies. accumulating evidence suggests that the whitefly [bemisia tabaci (genn.)] affects the regulation of plant defenses and physiology. a recent study demonstrates that aboveground whitefly infestation positively modulates root biomass and anthocyanin pigmentation on brace roots of maize plants (zea mays l ... | 2016 | 27164447 |