Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| effect of plant development (age and size) on the mi-1-mediated resistance of tomato to whitefly bemisia tabaci. | whitefly, bemisia tabaci, is one of the most important pests of tomato, solanum lycopersicum l. the mi-1 gene mediates tomato resistance to the middle east-asia minor 1 (meam1) and mediterranean (med) species of b. tabaci, three species of root-knot nematodes, meloidogyne spp., and the potato aphid, macrosiphum euphorbiae. tomato seedlings bearing the mi-1 gene are resistant to nematodes soon after germination but resistance to aphids is developmentally regulated; a reliable conclusion about mi- ... | 2017 | 28397642 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| quantitative resistance against bemisia tabaci in solanum pennellii: genetics and metabolomics. | the whitefly bemisia tabaci is a serious threat in tomato cultivation worldwide as all varieties grown today are highly susceptible to this devastating herbivorous insect. many accessions of the tomato wild relative solanum pennellii show a high resistance towards b. tabaci. a mapping approach was used to elucidate the genetic background of whitefly-resistance related traits and associated biochemical traits in this species. minor quantitative trait loci (qtls) for whitefly adult survival (as) a ... | 2016 | 26576823 |
| control of the tomato leafminer, tuta absoluta (lepidoptera: gelechiidae), in open-field tomatoes by indigenous natural enemies occurring in israel. | the tomato leafminer, tuta absoluta (meyrick), had established in israel by 2010, attacking both open-field tomatoes and greenhouse crops.we searched for its natural enemies in open-field tomatoes, and tried to determine their potential for controlling this pest. we surveyed the local natural enemies in open tomato fields and measured their impact on pest populations in an unsprayed field. we assessed the suppressive ability of the dominant hemipteran predator, nesidiocoris tenuis reuter, agains ... | 2016 | 26567332 |
| 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 |
| 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 |
| sequence variation of bemisia tabaci chemosensory protein 2 in cryptic species b and q: new dna markers for whitefly recognition. | bemisia tabaci gennadius biotypes b and q are two of the most important worldwide agricultural insect pests. genomic sequences of type-2 b. tabaci chemosensory protein (btabcsp2) were cloned and sequenced in b and q biotypes, revealing key biotype-specific variations in the intron sequence. a q260 sequence was found specifically in q-btabcsp2 and cucumis melo ln692399, suggesting ancestral horizontal transfer of gene between the insect and the plant through bacteria. a cleaved amplified polymorp ... | 2016 | 26481237 |
| 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 |
| 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 |
| 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 |
| 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 |
| transcriptome analysis reveals a comprehensive insect resistance response mechanism in cotton to infestation by the phloem feeding insect bemisia tabaci (whitefly). | the whitefly (bemisia tabaci) causes tremendous damage to cotton production worldwide. however, very limited information is available about how plants perceive and defend themselves from this destructive pest. in this study, the transcriptomic differences between two cotton cultivars that exhibit either strong resistance (hr) or sensitivity (zs) to whitefly were compared at different time points (0, 12, 24 and 48 h after infection) using rna-seq. approximately one billion paired-end reads were o ... | 2016 | 26923339 |
| reproduction of the whitefly bemisia tabaci (hemiptera: aleyrodidae) b biotype in maize fields (zea mays l.) in brazil. | bemisia tabaci (genn.) (hemiptera: aleyrodidae) was observed to have completed its reproductive cycle from the egg to the adult on maize (zea mays l.). field and screenhouse studies were carried out to investigate the durability of this putative and unprecedented adaptation to a grass host. | 2016 | 26910287 |
| oogenesis in the bemisia tabaci meam1 species complex. | the whitefly bemisia tabaci meam1 species complex has invaded several parts of the world in the past 30 years and replaced native whitefly populations in the invaded regions, including certain areas of china. one of the possible reasons for the invasion is that meam1 whiteflies are more fecund than native species. however, the factors that affect the reproduction of the b. tabaci cryptic species are not clearly known. the regulation of oogenesis is thought to be one of the essential processes fo ... | 2016 | 26826802 |
| computational insights into the different resistance mechanism of imidacloprid versus dinotefuran in bemisia tabaci. | insecticide resistance is a critical problem for pest control and management. for bemisia tabaci, striking high metabolic resistance (generally conferred by cyp6cm1) was observed for imidacloprid (imi) and most other neonicotinoid members. however, dinotefuran (din) displayed very low resistance factors, which indicated distinct metabolic properties. here, molecular modeling methods were applied to explore the different resistance features of imi versus din within the q type of cyp6cm1. it was f ... | 2016 | 26817991 |
| molecular cloning of the sex-related gene psi in bemisia tabaci and its alternative splicing properties. | the p-element somatic inhibitor (psi) is gene known to regulate the transcription of doublesex (dsx) when transformer (tra) is absent in bombyx mori. in this study, we identified and characterized a psi homolog in bemisia tabaci (btpsi). btpsi cdna had a total length of 5700 bp and contained a predicted open reading frame (orf) of 2208 nucleotides encoding for 735 amino acids. multiple sequence alignments of the common regions of psi proteins from b. tabaci and five other insect species revealed ... | 2016 | 26773355 |
| rna1-independent replication and gfp expression from tomato marchitez virus isolate m cloned cdna. | tomato marchitez virus (tomarv; synonymous with tomato apex necrosis virus) is a positive-strand rna virus in the genus torradovirus within the family secoviridae. tomarv is an emergent whitefly-transmitted virus that causes important diseases in tomato (solanum lycopersicum) in mexico. here, the genome sequence of the tomarv isolate m (tomarv-m) was determined. we engineered full-length cdna clones of the tomarv-m genomic rna (rna1 and rna2), separately, into a binary vector. coinfiltration of ... | 2016 | 26756828 |
| lethal and inhibitory activities of plant-derived essential oils against bemisia tabaci gennadius (hemiptera: aleyrodidae) biotype b in tomato. | the silverleaf whitefly bemisia tabaci (genn.) biotype b (hemiptera: aleyrodidae) is one of the most severe tomato pests in the world. the damage caused by this insect may compromise up to 100% of crop production, and management of this pest has relied on spraying of synthetic insecticides. however, due to the environmental issues associated with this practice, alternative methods such as the use of botanical pesticides are now used as a strategy of integrated pest management (ipm). we evaluated ... | 2016 | 26712319 |
| use of lablab (lablab purpureus (l.) sweet) for bio-control by native arthropods and its effect on yield of pumpkins. | silverleaf whitefly (slw, bemisia tabaci meam1) and aphids are sap-sucking insects, which pose a serious threat to australian cucurbit crops and the horticulture industry. traditional chemical control for these insect pests is becoming less effective, and there is a need to search for alternative or supplementary methods. this study aimed to manipulate the habitat of pumpkin crops in a tropical setting (queensland, australia), by growing pumpkins (var. japanese pumpkin) alone and between lablab ... | 2016 | 26693799 |
| proteome analysis of bemisia tabaci suggests specific targets for rnai mediated control. | rna interference offers effective control of several economically important insect pests. bemisia tabaci is an important field crop pest, which causes significant yield loss worldwide. in our earlier study, we have demonstrated successful control of b. tabaci through transgenic plant mediated rnai. however, selection of target genes without off-target effect(s) has been major concern so far and therefore, a critical exploration for b. tabaci specific targets is frantically required. in this stud ... | 2016 | 26646750 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| phylogeographical structure in mitochondrial dna of whitefly, bemisia tabaci gennadius (hemiptera: aleyrodidae) in southern india and southeast asia. | south and southeast asia endure high vegetable production losses due to begomovirus diseases mainly transmitted by the insect vector, whitefly (bemisia tabaci). control over the spread of virus infection can be achieved through a better understanding of genetic diversity among b. tabaci. a total of 64 populations of b. tabaci collected from tamil nadu (india), vietnam, thailand, and indonesia were investigated based on mitochondrial cytochrome c oxidase i (coxi) sequences. populations from tamil ... | 2016 | 27159720 |
| molecular characterization of vitellogenin and vitellogenin receptor of bemisia tabaci. | vitellogenin (vg) plays vital role in oocytes and embryo development in insects. vg is synthesized in the fat body, moves through haemolymph and accumulates in oocytes. vitellogenin receptors (vgr) present on the surface of oocytes, are responsible for vg transportation from haemolymph to oocytes. here, we cloned and characterized these genes from bemisia tabaci asia1 (bta1) species. the cloned bta1vg and bta1vgr genes consisted of 6,330 and 5,430 bp long open reading frames, which encoded 2,109 ... | 2016 | 27159161 |
| no cross-resistance between imidacloprid and pymetrozine in the brown planthopper: status and mechanisms. | cross-resistance between insecticides, especially from different groups, can be extremely unpredictable, and it has been a serious concern in pest control. pymetrozine has been widely used to control nilaparvata lugens with the suspension of imidacloprid for the resistance, and n. lugens has showed obvious pymetrozine resistance in recent years. to investigate the possible cross-resistance between imidacloprid and pymetrozine is very important to avoid the adverse effects on resistance developme ... | 2016 | 27155488 |
| the suitability of biotypes q and b of bemisia tabaci (gennadius) (hemiptera: aleyrodidae) at different nymphal instars as hosts for encarsia formosa gahan (hymenoptera: aphelinidae). | encarsia formosa gahan (hymenoptera: aphelinidae) is a solitary endoparasitoid that is commercially reared and released for augmentative biological control of whiteflies infesting greenhouse crops. in most areas in china, the invasive and destructive whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae) biotype q has replaced b. tabaci biotype b and has become dominant between the two. a better understanding of the suitability of different nymphal instars of b. tabaci biotypes q and b as ... | 2016 | 27114862 |
| rna interference based approach to down regulate osmoregulators of whitefly (bemisia tabaci): potential technology for the control of whitefly. | over the past decade rna interference (rnai) technology has emerged as a successful tool not only for functional genomics, but in planta expression of short interfering rnas (sirnas) that could offer great potential for insect pest management. the diet of insects feeding exclusively on phloem sieves contains water and sugars as main components, and the uptake of the liquid food greatly depends on the osmotic pressure within the insect body. based on this physiological mechanism, transgenic plant ... | 2016 | 27105353 |
| leaf morphological characters can be a factor for intra-varietal preference of whitefly bemisia tabaci (hemiptera: aleyrodidae) among eggplant varieties. | the sweetpotato whitefly, bemisia tabaci (hemiptera: aleyrodidae) meam1, is considered a serious pest of horticultural and many other crops. while eggplant (solanum melongena) is one of the most favored host plants, the whiteflies exhibit preferences among different varieties. we hypothesized that certain morphological leaf characteristics of different varieties, like leaf trichome density, trichome length, leaf lamina thickness and leaf color, may affect whitefly landing, feeding and ovipositio ... | 2016 | 27081849 |
| differential tolerance capacity to unfavourable low and high temperatures between two invasive whiteflies. | thermal response and tolerance to ambient temperature play important roles in determining the geographic distribution and seasonal abundance of insects. we examined the survival and performance, as well as expression of three heat shock protein related genes, of two species of invasive whiteflies, middle east-asia minor 1 (meam1) and mediterranean (med), of the bemisia tabaci species complex following exposure to a range of low and high temperatures. our data demonstrated that the med species wa ... | 2016 | 27080927 |
| differential and synergistic functionality of acylsugars in suppressing oviposition by insect herbivores. | acylsugars are secondary metabolites exuded from type iv glandular trichomes that provide broad-spectrum insect suppression for solanum pennellii correll, a wild relative of cultivated tomato. acylsugars produced by different s. pennellii accessions vary by sugar moieties (glucose or sucrose) and fatty acid side chains (lengths and branching patterns). our objective was to determine which acylsugar compositions more effectively suppressed oviposition of the whitefly bemisia tabaci (gennadius) (m ... | 2016 | 27065236 |
| whiteflies stabilize their take-off with closed wings. | the transition from ground to air in flying animals is often assisted by the legs pushing against the ground as the wings start to flap. here, we show that when tiny whiteflies (bemisia tabaci, body length ca. 1 mm) perform take-off jumps with closed wings, the abrupt push against the ground sends the insect into the air rotating forward in the sagittal (pitch) plane. however, in the air, b. tabaci can recover from this rotation remarkably fast (less than 11 ms), even before spreading its wings ... | 2016 | 27045098 |
| complete nucleotide sequences of a new bipartite begomovirus from malvastrum sp. plants with bright yellow mosaic symptoms in south texas. | two isolates of a novel bipartite begomovirus, tentatively named malvastrum bright yellow mosaic virus (mabymv), were molecularly characterized from naturally infected plants of the genus malvastrum showing bright yellow mosaic disease symptoms in south texas. six complete dna-a and five dna-b genome sequences of mabymv obtained from the isolates ranged in length from 2,608 to 2,609 nucleotides (nt) and 2,578 to 2,605 nt, respectively. both genome segments shared a 178- to 180-nt common region. ... | 2016 | 27016928 |
| further insight into reproductive incompatibility between putative cryptic species of the bemisia tabaci whitefly complex. | the whitefly bemisia tabaci (gennadius) (hemiptera: aleyrodidae), with its global distribution and extensive genetic diversity, is now known to be a complex of over 35 cryptic species. however, a satisfactory resolution of the systematics of this species complex is yet to be achieved. here, we designed experiments to examine reproductive compatibility among species with different levels of mitochondrial cytochrome oxidase i (mtcoi) divergence. the data show that putative species with mtcoi diver ... | 2016 | 27001484 |
| 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 |
| 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 |
| 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 |
| how active ingredient localisation in plant tissues determines the targeted pest spectrum of different chemistries. | the efficacies of four commercial insecticides and of two research compounds were tested against aphids (aphis craccivora and myzus persicae), whiteflies (bemisia tabaci) and red-spotted spider mites (tetranychus urticae) in intrinsic (oral administration), curative (direct contact spray) and translaminar (arthropods infested on untreated leaf underside) assays. with a new translaminar model, the transport across the leaf cuticle and tissues and the electrochemical distribution of test compounds ... | 2016 | 26112169 |
| glucosinolate desulfation by the phloem-feeding insect bemisia tabaci. | glucosinolates are plant secondary defense metabolites confined nearly exclusively to the order brassicales. upon tissue rupture, glucosinolates are hydrolyzed to various bioactive breakdown products by the endogenous plant enzyme myrosinase. as the feeding of chewing insect herbivores is associated with plant tissue damage, these insects have developed several independent strategies for coping with the glucosinolate-myrosinase defense system. on the other hand, our knowledge of how phloem-feedi ... | 2016 | 26961756 |
| repellent and attractive effects of α-, β-, and dihydro-β- ionone to generalist and specialist herbivores. | in plants, the oxidative cleavage of carotenoid substrates produces volatile apocarotenoids, including α-ionone, β-ionone, and dihydro-β-ionone, compounds that are important in herbivore-plant communication. for example, β-ionone is part of an induced defense in canola, brassica napus, and is released following wounding by herbivores. the objectives of the research were to evaluate whether these volatile compounds would: 1) be released in higher quantities from plants through the over-expression ... | 2016 | 26852133 |
| conditional fitness benefits of the rickettsia bacterial symbiont in an insect pest. | inherited bacterial symbionts are common in arthropods and can have strong effects on the biology of their hosts. these effects are often mediated by host ecology. the rickettsia symbiont can provide strong fitness benefits to its insect host, bemisia tabaci, under laboratory and field conditions. however, the frequency of the symbiont is heterogeneous among field collection sites across the usa, suggesting that the benefits of the symbiont are contingent on additional factors. in two whitefly g ... | 2016 | 26376661 |
| transgenic cotton-fed bemisia tabaci (gennadius) (hemiptera: aleyrodidae) affects the parasitoid encarsia desantisi viggiani (hymenoptera: aphelinidae) development. | cotton cultivars expressing cry proteins are widely used to control lepidopteran pests. the effects of transgenic plants containing insecticidal cry proteins on non-target species must be comprehended for a better and rational use of this technology for pest management. we investigated the influence of the bt cotton cultivars nuopal and fm 975 on biological parameters of bemisia tabaci (gennadius) (hemiptera: aleyrodidae), a non-target pest of bt cotton cultivars and on its parasitoid encarsia d ... | 2016 | 26431703 |
| temporal changes of symbiont density and host fitness after rifampicin treatment in a whitefly of the bemisia tabaci species complex. | microbial symbionts are essential or important partners to phloem-feeding insects. antibiotics have been used to selectively eliminate symbionts from their host insects and establish host lines with or without certain symbionts for investigating functions of the symbionts. in this study, using the antibiotic rifampicin we attempted to selectively eliminate certain symbionts from a population of the middle east-asia minor 1 whitefly of the bemisia tabaci species complex, which harbors the primary ... | 2016 | 26412633 |
| preference of bemisia tabaci biotype b on zucchini squash and buckwheat and the effect of delphastus catalinae on whitefly populations. | zucchini squash, cucurbita pepo l., is an important vegetable crop in florida. physiological disorders and insect-transmitted diseases are major problems for squash growers in semi-tropical regions around the world. bemisia tabaci (gennadius) biotype b is a significant whitefly pest and is largely responsible for transmitting viruses and causing physiological disorders in squash. several studies have shown that whitefly populations are reduced when crops are interplanted with non-host cover crop ... | 2016 | 26388111 |
| naturally occurring bioactive compounds from four repellent essential oils against bemisia tabaci whiteflies. | in tropical countries, netting is an effective sustainable tool for protecting horticultural crops against lepidoptera, although not against small pests such as bemisia tabaci, while smaller mesh netting can be used in temperate regions. a solution is to combine a net with a repellent. previously we identified repellent essential oils: lemongrass (cymbopogon citratus), cinnamon (cinnamomum zeylanicum), cumin (cuminum cyminum) and citronella (cymbopogon winternarius). the present study was design ... | 2016 | 25641934 |
| transgenic plants expressing the aait/gna fusion protein show increased resistance and toxicity to both chewing and sucking pests. | the adoption of pest-resistant transgenic plants to reduce yield losses and decrease pesticide use has been successful. to achieve the goal of controlling both chewing and sucking pests in a given transgenic plant, we generated transgenic tobacco, arabidopsis, and rice plants expressing the fusion protein, aait/gna, in which an insecticidal scorpion venom neurotoxin (androctonus australis toxin, aait) is fused to snowdrop lectin (galanthus nivalis agglutinin, gna). compared with transgenic tobac ... | 2016 | 25641865 |
| functional response, host stage preference and interference of two whitefly parasitoids. | the functional responses of two parasitoids, eretmocerus hayati zolnerowich & rose and encarsia sophia girault & dodd, of whitefly bemisia tabaci gennadius middle east-asia minor 1 were studied under laboratory conditions. in addition, the influence of host density and host stage on the competitive interactions between the two parasitoids, and biological control effect on whitefly were evaluated. in the functional response study, adult parasitoids were tested individually, with a conspecific or ... | 2016 | 25393924 |
| complete mitochondrial dna genome of bemisia tabaci cryptic pest species complex asia i (hemiptera: aleyrodidae). | the complete length of the asia i member of the bemisia tabaci species complex mitochondrial dna genome (mitogenome) is 15,210 bp (genbank accession no. kj778614) with an a-t biased nucleotide composition (a: 32.7%; t: 42.4%; g: 14.0%; c: 10.8%). the mitogenome consists of 13 protein-coding genes (pcgs), 22 transfer rnas (trnas), 2 ribosomal rna (rrnas) and a 467 bp putative control region which also includes the a+t rich repeat region. all pcgs have an ata (n = 8) or atg (n = 5) start codon. ge ... | 2016 | 24960562 |
| 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 |
| 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 |
| effects of spirotetramat treatments on fecundity and carboxylesterase expression of aphis gossypii glover. | spirotetramat is a novel tetramic acid-based insecticide, belonging to keto-enol pesticide family, with a novel mode of action; it interferes with lipid biosynthesis. its insecticide activity against various agricultural pest insects have been demonstrated (e.g. on myzus persicae, bemisia tabaci and tetranychus urticae). however, information available is currently limited on the efficacy of spirotetramat on the cotton aphid, aphis gossypii, a key cotton pest worldwide. we assessed the spirotetra ... | 2016 | 26898726 |
| inhibition of α-glucosidase activity by n-deoxynojirimycin analogs in several insect phloem sap feeders. | secondary metabolites and synthetic iminosugars that structurally resemble monosaccharides are potent inhibitors of α-glucosidase activity. the enzyme is core in cleaving sucrose in phloem feeding insects and it also plays a crucial role of reducing osmotic stress via the formation of oligosaccharides. inhibition of hydrolysis by iminosugars should result in nutritional deficiencies and/or disruption of normal osmoregulation. deoxynojirimycin (dnj) and 2 n-alkylated analogs [n-butyl dnj (nb-dnj) ... | 2016 | 25900765 |
| rapid assessment of insect fauna based on local knowledge: comparing ecological and ethnobiological methods. | the rapid assessment of biodiversity making use of surveys of local knowledge has been successful for different biological taxa. however, there are no reports on the testing of such tools for sampling insect fauna. the present study aimed to evaluate the efficiency of different ethnobiological techniques for rapid sampling of insect fauna. | 2016 | 26932264 |