Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
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| zoophytophagous mirids provide pest control by inducing direct defences, antixenosis and attraction to parasitoids in sweet pepper plants. | in addition to their services as predators, mirid predators are able to induce plant defences by phytophagy. however, whether this induction occurs in sweet pepper and whether it could be an additional benefit to their role as biological control agent in this crop remains unknown. here, these questions are investigated in two model insects, the mirids nesidiocoris tenuis and macrolophus pygmaeus. | 2017 | 29274122 |
| effects of pesticides on the survival of rove beetle (coleoptera: staphylinidae) and insidious flower bug (hemiptera: anthocoridae) adults. | this study determined the direct, indirect, or both effects of pesticides on the rove beetle, dalotia coriaria (kraatz) (coleoptera: staphylinidae), and the insidious flower bug, orius insidiosus (say) (hemiptera: anthocoridae). the pesticides evaluated were capsicum oleoresin extract, garlic oil, and soybean oil; cyantraniliprole; flupyradifurone; gs-omega/kappa-hxtx-hv1; isaria fumosorosea; tolfenpyrad; pyrethrins; and spinosad. one experiment was conducted in a greenhouse with rove beetle adu ... | 2017 | 29202189 |
| selecting native perennial plants for ecological intensification in mediterranean greenhouse horticulture. | natural control by predators and parasitoids provides an important and often unnoticed ecosystem service to agricultural landscapes by reducing pest populations in crops. the current model of horticultural intensification in south-eastern spain produces high yields but has also resulted in a landscape almost completely covered by plastic. promoting natural areas among greenhouses could enhance biodiversity, by being beneficial insects, and reduce pest pressure outdoors. the first step is to asce ... | 2017 | 29198200 |
| phytophagy of omnivorous predator macrolophus pygmaeus affects performance of herbivores through induced plant defences. | plants possess various inducible defences that result in synthesis of specialized metabolites in response to herbivory, which can interfere with the performance of herbivores of the same and other species. much less is known of the effects of plant feeding by omnivores. we found that previous feeding of the omnivorous predator macrolophus pygmaeus on sweet pepper plants significantly reduced reproduction of the two-spotted spider mite tetranychus urticae and western flower thrips frankliniella o ... | 2018 | 29124341 |
| a decade of a thrips invasion in china: lessons learned. | the western flower thrips, frankliniella occidentalis pergande (thysanoptera: thripidae) is an invasive polyphagous pest with an expanding global range that damages a wide variety of crops. f. occidentalis was first reported in china from yunnan province during 2000, and has rapidly expanded its range since then. it is currently distributed across at least 10 provinces in china and has become a particularly devastating pest, causing substantial damage and economic losses. at present, the still h ... | 2017 | 29027089 |
| unexpected high intragenomic variation in two of three major pest thrips species does not affect ribosomal internal transcribed spacer 2 (its2) utility for thrips identification. | the mitochondrial cytochrome oxidase i gene (mtco1) and the ribosomal internal transcribed spacer 2 region (its2) are among the most widely used molecular markers for insect taxonomic characterization. three economically important species of thrips, scirtothripsdorsalis, thripspalmi, and frankliniellaoccidentalis were selected to examine the extent of intragenomic variation within these two marker regions in the family thripidae, and determine if this variation would affect the utility of marker ... | 2017 | 28984819 |
| olfactory response of the predatory bug orius laevigatus (hemiptera:anthocoridae) to the aggregation pheromone of its prey, frankliniella occidentalis (thysanoptera: thripidae). | herbivore natural enemies base their foraging decision on information cues from different trophic levels but mainly from plant odors. however, the second trophic level (i.e., the herbivorous prey) may also provide reliable infochemical cues for their natural enemies. we have evaluated the role of the aggregation pheromone from frankliniella occidentalis (pergande) as a potential kairomone for its natural enemy, the predatory bug orius laevigatus (fieber). for this purpose, we have analyzed the r ... | 2017 | 28962006 |
| reproductive behavior of echinothrips americanus (thysanoptera: thripidae). | most thysanoptera possess a haplo-diploid reproductive mode and reproduce via arrhenotoky. females can mature eggs successively throughout almost their entire life, but in most terebrantian thrips spermiogenesis is complete by adult male eclosion, and testes contain only mature spermatids. in parasitoid wasps this phenomenon of preadult spermiogenesis is described as prospermatogeny. it is unclear if prospermatogeny and this predetermined sperm quantity have implications for mating strategy and ... | 2017 | 28931160 |
| interactions between plant metabolites affect herbivores: a study with pyrrolizidine alkaloids and chlorogenic acid. | the high structural diversity of plant metabolites suggests that interactions among them should be common. we investigated the effects of single metabolites and combinations of plant metabolites on insect herbivores. in particular we studied the interacting effects of pyrrolizidine alkaloid (pas), and chlorogenic acid (cga), on a generalist herbivore, frankliniella occidentalis. we studied both the predominantly occurring pa n-oxides and the less frequent pa free bases. we found antagonistic eff ... | 2017 | 28611815 |
| the benefits of clustering eggs: the role of egg predation and larval cannibalism in a predatory mite. | many arthropods produce clusters of eggs, but an unambiguous explanation for the evolution of egg clustering is still lacking. we test several hypotheses for the production of egg clusters by the predatory mite iphiseius degenerans. this predator feeds on pollen, thrips larvae and nectar in flowers, but oviposits in clusters in tufts of leaf hairs (acarodomatia), where eggs run a lower risk of being killed by thrips, the prey of this predatory mite. the observed clustering is not caused by a sho ... | 2002 | 28547506 |
| trichomes and spider-mite webbing protect predatory mite eggs from intraguild predation. | predaceous arthropods are frequently more abundant on plants with leaves that are pubescent or bear domatia than on plants with glabrous leaves. we explored the hypothesis that for some predatory mites this is because pubescence affords protection from intraguild predation. in laboratory experiments, we tested whether apple leaf pubescence protected typhlodromus pyri eggs from predation by western flower thrips, frankliniella occidentalis. to investigate the effect of pubescence further, we adde ... | 2000 | 28547338 |
| within-plant distribution and dynamics of thrips species (thysanoptera: thripidae) in cotton. | a 2-yr study in cotton (gossypium hirsutum l.) was conducted to determine the abundance and species composition of thrips (thysanoptera: thripidae) on different plant parts throughout the season in alabama, georgia, north carolina, south carolina, and virginia. plant parts sampled included seedlings, terminals with two expanded leaves, leaves from the upper, middle, and lower sections of the canopy, white flowers, and medium-sized bolls. adult thrips were significantly more abundant on seedlings ... | 2017 | 28475718 |
| the influence of elevated co2 concentration on the fitness traits of frankliniella occidentalis and frankliniella intonsa (thysanoptera: thripidae). | development and fecundity were investigated in an invasive alien thrips species, frankliniella occidentalis (pergande), and a related native species, frankliniella intonsa (trybom), under high co2 concentration. results show that the two thrips species reacted differently toward elevated co2 concentration. developmental duration decreased significantly (11.93%) in f. occidentalis at the co2 concentration of 800 µl/liter; survival rate of all stages also significantly increased (e.g., survival ra ... | 2017 | 28472267 |
| fitness trade-off associated with spinosad resistance in frankliniella occidentalis (thysanoptera: thripidae). | frankliniella occidentalis (pergande) is an economically important pest of agricultural crops. high resistance has been detected in field populations of f. occidentalis against the insecticide spinosad. in this study, we compared life history traits, body sizes, and feeding behaviors (recorded via an electrical penetration graph) of spinosad-susceptible (ivf03) and spinosad-resistant (nil-r) near-isogenic lines of f. occidentalis. life table analysis showed that nil-r had reduced female longevit ... | 2017 | 28444324 |
| direct and indirect effects of pesticides on the insidious flower bug (hemiptera: anthocoridae) under laboratory conditions. | greenhouse producers are interested in integrating natural enemies along with pesticides to suppress western flower thrips, frankliniella occidentalis (pergande), populations. the insidious flower bug, orius insidiosus (say), is a commercially available natural enemy of western flower thrips. we conducted a series of laboratory experiments to determine the direct and indirect effects of 28 pesticides (insecticides, miticides, and fungicides), 4 pesticide mixtures, and 4 surfactants (36 total tre ... | 2017 | 28444217 |
| 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 |
| predatory interactions between prey affect patch selection by predators. | when predators can use several prey species as food sources, they are known to select prey according to foraging efficiency and food quality. however, interactions between the prey species may also affect prey choice, and this has received limited attention. the effect of one such interaction, intraguild predation between prey, on patch selection by predators was studied here. the predatory mite neoseiulus californicus preys on young larvae of the western flower thrips frankliniella occidentalis ... | 2017 | 28356611 |
| low genetic diversity but strong population structure reflects multiple introductions of western flower thrips (thysanoptera: thripidae) into china followed by human-mediated spread. | historical invasion scenarios based on observational records are usually incomplete and biased, but these can be supplemented by population genetic data. the western flower thrips (wft), frankliniella occidentalis, invaded china in the last 13 years and has rapidly become one of the most serious pests in the country. to assess whether this invasion involved a single event or multiple events, we examined patterns of genetic diversity and population structure of wft across 12 chinese populations a ... | 2017 | 28352298 |
| development of near-isogenic lines in a parthenogenetically reproduced thrips species, frankliniella occidentalis. | although near-isogenic lines (nils) can standardize genetic backgrounds among individuals, it has never been applied in parthenogenetically reproduced animals. here, through multiple rounds of backcrossing and spinosad screening, we generated spinosad resistant nils in the western flower thrips, frankliniella occidentalis (pergande) (thysanoptera: thripidae), with a haplo-diploid reproduction system. the resultant f. occidentalis nil-r strain maintained a resistance ratio over 30,000-fold, which ... | 2017 | 28348528 |
| x-ray irradiation control of frankliniella occidentalis and frankliniella intonsa (thysanoptera: thripidae) in the exportation of freshly cut lily flowers. | lily (lilium longiflorum thunb.) is the most representative bulb flower, and it is the third most important flower in the flower industry of south korea after rose and chrysanthemum. to determine the efficacy of x-ray irradiation for use in quarantine processing, two species of flower thrips (frankliniella intonsa (trybom) and frankliniella occidentalis (pergande)) were placed in the top, middle, and bottom locations of lily boxes and irradiated with different x-ray doses. after irradiation with ... | 2017 | 28334123 |
| odour-mediated responses of phytophagous mites to conspecific and heterospecific competitors. | plants under herbivore attack produce volatiles, thus attracting natural enemies of the herbivores. however, in doing so, the plant becomes more conspicuous to other herbivores. herbivores may use the odours as a cue to refrain from visiting plants that are already infested, thereby avoiding competition for food, or, alternatively, to visit plants with defences weakened by earlier attacks. we investigated the response of one species of herbivore (the spider mite tetranychus urticae) to odours em ... | 1997 | 28307422 |
| effect of elevated co2 on interactions betwe en the western flower thrips, frankliniella occidentalis (thysanoptera: thripidae) and the common milkweed, asclepias syriaca. | we measured the effect of elevated co2 on populations of the western flower thrips, frankliniella occidentalis and on the amount of leaf damage inflicted by the thrips to one of its host plants, the common milkweed, asclepias syriaca. plants grown at elevated co2 had significantly greater aboveground biomass and c:n ratios, and significantly reduced percentage nitrogen. the number of thrips per plant was not affected by co2 treatment, but the density of thrips (numbers per gram aboveground bioma ... | 1997 | 28307181 |
| natural variation in life history strategy of arabidopsis thaliana determines stress responses to drought and insects of different feeding guilds. | plants are sessile organisms and, consequently, are exposed to a plethora of stresses in their local habitat. as a result, different populations of a species are subject to different selection pressures leading to adaptation to local conditions and intraspecific divergence. the annual brassicaceous plant arabidopsis thaliana is an attractive model for ecologists and evolutionary biologists due to the availability of a large collection of resequenced natural accessions. accessions of a. thaliana ... | 2017 | 28295823 |
| the effect of structurally related metabolites on insect herbivores: a case study on pyrrolizidine alkaloids and western flower thrips. | plant specialised metabolites (sms) are very diverse in terms of both their number and chemical structures with more than 200,000 estimated compounds. this chemical diversity occurs not only among different groups of compounds but also within the groups themselves. in the context of plant-insect interactions, the chemical diversity within a class of structurally related metabolites is generally also related to their bioactivity. in this study, we tested firstly whether individual sms within the ... | 2017 | 28267991 |
| real-time pcr assay for distinguishing frankliniella occidentalis and thrips palmi arnika przybylska, żaneta fiedler, aleksandra obrępalska-stęplowska. | thrips palmi and frankliniella occidentalis (order thysanoptera) are thrips species that represent major plant pests. they are polyphagous insects capable of adversely affecting crop production. as such, in the european union, these thrips species should be regulated as quarantine organisms. t. palmi and f. occidentalis can cause considerable damage to susceptible plants by feeding on them and transmitting several viruses responsible for serious plant diseases. successful pest control strategies ... | 2017 | 28245887 |
| induction of jasmonic acid-associated defenses by thrips alters host suitability for conspecifics and correlates with increased trichome densities in tomato. | plant defenses inducible by herbivorous arthropods can determine performance of subsequent feeding herbivores. we investigated how infestation of tomato (solanum lycopersicum) plants with the western flower thrips (frankliniella occidentalis) alters host plant suitability and foraging decisions of their conspecifics. we explored the role of delayed-induced jasmonic acid (ja)-mediated plant defense responses in thrips preference by using the tomato mutant def-1, impaired in ja biosynthesis. in pa ... | 2017 | 28158865 |
| integrated pest management in western flower thrips: past, present and future. | western flower thrips (wft) is one of the most economically important pest insects of many crops worldwide. recent eu legislation has caused a dramatic shift in pest management strategies, pushing for tactics that are less reliable on chemicals. the development of alternative strategies is therefore an issue of increasing urgency. this paper reviews the main control tactics in integrated pest management (ipm) of wft, with the focus on biological control and host plant resistance as areas of majo ... | 2017 | 28127901 |
| non-associative versus associative learning by foraging predatory mites. | learning processes can be broadly categorized into associative and non-associative. associative learning occurs through the pairing of two previously unrelated stimuli, whereas non-associative learning occurs in response to a single stimulus. how these two principal processes compare in the same learning task and how they contribute to the overall behavioural changes brought about by experience is poorly understood. we tackled this issue by scrutinizing associative and non-associative learning o ... | 2017 | 28088215 |
| pesticide-mediated interspecific competition between local and invasive thrips pests. | competitive interactions between species can be mitigated or even reversed in the presence of anthropogenic influences. the thrips species frankliniella occidentalis and thrips tabaci are highly invasive and damaging agricultural pests throughout the world. where the species co-occur, one species tends to eventually predominate over the other. avermectin and beta-cypermethrin are commonly used insecticides to manage thrips in china, and laboratory bioassays demonstrated that f. occidentalis is s ... | 2017 | 28084404 |
| quarantine treatments of imported nursery plants and exported cut flowers by phosphine gas (ph3) as methyl bromide alternative. | quarantine treatments by phosphine (ph3) gas have been performed to replace methyl bromide (mebr) for export cut flowers and imported nursery plant in korea. in this preliminary study, two dominant insect pests of cut flowers, tetranychus urticae koch and frankliniella occidentalis pergande, and the dominant insect pest of nursery plants, planococcus citri risso, were used to certify optimum concentration and fumigation time, along with evaluation of phytotoxic damages. to validate the results o ... | 2016 | 27986936 |
| predatory mites double the economic injury level of frankliniella occidentalis in strawberry. | the western flower thrips frankliniella occidentalis (pergande) (thysanoptera: thripidae) causes bronzing to strawberry fruit. management of insecticide-resistant strains relies on the integration of predators with carefully timed use of the few insecticides available. effective management requires better understanding of economic injury levels (eils) and the factors that affect them. the densities of f. occidentalis and the predatory mite neoseiulus cucumeris (oudemans) (acari: phytoseiidae) we ... | 2016 | 27909392 |
| using calendula officinalis as a floral resource to enhance aphid and thrips suppression by the flower bug orius sauteri (hemiptera: anthocoridae). | the flower bug orius sauteri (poppius) (hemiptera: anthocoridae) is widely used as a biocontrol agent against thrips and aphids infesting greenhouse vegetables in asia. the survival and oviposition of such predators, as well as the biocontrol services they provide, may be enhanced by adding extra floral resources to the crops. in the present study we investigated the effects of the plant calendula officinalis l., used as a floral resource, for promoting the control of myzus persicae (sulzer) and ... | 2017 | 27860184 |
| beyond focal pests: impact of a neonicotinoid seed treatment and resistant soybean lines on a non-target arthropod. | integrated pest management (ipm) tactics may effectively control focal pests, but it is also important to test the compatibility of different tactics, and consider non-target organisms. we investigated the effects of a neonicotinoid seed treatment and rag resistance genes used for soybean aphid (aphis glycines matsumura) control on reproduction of a non-target herbivore (twospotted spider mite, tetranychus urticae koch) in short-term greenhouse experiments. we also examined interactions between ... | 2016 | 27845714 |
| thrips developmental stage-specific transcriptome response to tomato spotted wilt virus during the virus infection cycle in frankliniella occidentalis, the primary vector. | tomato spotted wilt virus (tswv) is transmitted by frankliniella occidentalis in a circulative-propagative manner. little is known about thrips vector response to tswv during the infection process from larval acquisition to adult inoculation of plants. whole-body transcriptome response to virus infection was determined for first-instar larval, pre-pupal and adult thrips using rna-seq. tswv responsive genes were identified using preliminary sequence of a draft genome of f. occidentalis as a refer ... | 2017 | 27835811 |
| differential proteomics analysis of frankliniella occidentalis immune response after infection with tomato spotted wilt virus (tospovirus). | tomato spotted wilt virus (tswv) is mainly vectored by frankliniella occidentalis pergande, and it potentially activates the vector's immune response. however, molecular background of the altered immune response is not clearly understood. therefore, using a proteomic approach, we investigated the immune pathways that are activated in f. occidentalis larvae after 24 h exposure to tswv. two-dimensional isoelectric focusing/sodium dodecyl sulfate polyacrylamide gel electrophoresis (2d-ief/sds/page) ... | 2017 | 27810283 |
| the genus tospovirus: emerging bunyaviruses that threaten food security. | the genus tospovirus is unique within the family bunyaviridae in that it is made up of viruses that infect plants. initially documented over 100 years ago, tospoviruses have become increasingly important worldwide since the 1980s due to the spread of the important insect vector frankliniella occidentalis and the discovery of new viruses. as a result, tospoviruses are now recognized globally as emerging agricultural diseases. tospoviruses and their vectors, thrips species in the order thysanopter ... | 2016 | 27578436 |
| manipulation of frankliniella occidentalis (thysanoptera: thripidae) by tomato spotted wilt virus (tospovirus) via the host plant nutrients to enhance its transmission and spread. | earlier studies have shown that tomato spotted wilt virus (tswv) influences the biology, performance, and behavioral patterns of its vector frankliniella occidentalis pergande. in this study, using capsicum annuum l. as the host plant, we aimed to determine the manipulation of f. occidentalis by tswv through switching of the diet (+ or -tswv) during vector's development. behavioral patterns, fitness, as well as vector performance were evaluated. the specific parameters investigated included long ... | 2016 | 27566527 |
| 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 |
| impact of factitious foods and prey on the oviposition of the predatory mites gaeolaelaps aculeifer and stratiolaelaps scimitus (acari: laelapidae). | the soil-dwelling predatory mites gaeolaelaps aculeifer and stratiolaelaps scimitus (mesostigmata: laelapidae) are important biocontrol agents of several pests (astigmata, thysanoptera, diptera). there is little information regarding the use of factitious foods that potentially improve their mass rearing and population development once released in the field. here we tested the suitability of several types of factitious food and prey for g. aculeifer and s. scimitus. factitious foods included egg ... | 2016 | 27388446 |
| bulk development and stringent selection of microsatellite markers in the western flower thrips frankliniella occidentalis. | recent improvements in next-generation sequencing technologies have enabled investigation of microsatellites on a genome-wide scale. faced with a huge amount of candidates, the use of appropriate marker selection criteria is crucial. here, we used the western flower thrips frankliniella occidentalis for an empirical microsatellite survey and validation; 132,251 candidate microsatellites were identified, 92,102 of which were perfect. dinucleotides were the most abundant category, while (ag)n was ... | 2016 | 27197749 |
| predictive models for tomato spotted wilt virus spread dynamics, considering frankliniella occidentalis specific life processes as influenced by the virus. | several models have been studied on predictive epidemics of arthropod vectored plant viruses in an attempt to bring understanding to the complex but specific relationship between the three cornered pathosystem (virus, vector and host plant), as well as their interactions with the environment. a large body of studies mainly focuses on weather based models as management tool for monitoring pests and diseases, with very few incorporating the contribution of vector's life processes in the disease dy ... | 2016 | 27159134 |
| a crispr/cas9 mediated point mutation in the alpha 6 subunit of the nicotinic acetylcholine receptor confers resistance to spinosad in drosophila melanogaster. | spinosad, a widely used and economically important insecticide, targets the nicotinic acetylcholine receptor (nachrs) of the insect nervous system. several studies have associated loss of function mutations in the insect nachr α6 subunit with resistance to spinosad, and in the process identified this particular subunit as the specific target site. more recently a single non-synonymous point mutation, that does not result in loss of function, was identified in spinosad resistant strains of three ... | 2016 | 27117524 |
| 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 |
| identification, genomic organization and expression profiles of four heat shock protein genes in the western flower thrips, frankliniella occidentalis. | the western flower thrips, frankliniella occidentalis, is an important invasive pest with a strong tolerance for extreme temperatures; however, the molecular mechanisms that regulate thermotolerance in this insect remain unclear. in this study, four heat shock protein genes were cloned from f. occidentalis and named fohsp90, fohsc701, fohsc702 and fohsp60. these four hsps exhibited typical characteristics of heat shock proteins. subcellular localization signals and phylogenetic analysis indicate ... | 2016 | 27033046 |
| effects of single and dual species herbivory on the behavioural responses of three thrips species to cotton seedlings. | this study investigated the olfactory responses of three thrips species [frankliniella schultzei trybom, f. occidentalis pergrande and thrips tabaci lindeman (thysanoptera: thripidae)] to cotton seedlings [gossypium hirsutum l. (malvales: malvaceae)] simultaneously damaged by different combinations of herbivores. cotton seedlings were damaged by foliar feeding tetranychus urticae koch (trombidiforms: tetranychidae), helicoverpa armigera hübner (lepidoptera: noctuidae), aphis gossypii glover (hem ... | 2016 | 27029603 |
| salivary gland morphology, tissue tropism and the progression of tospovirus infection in frankliniella occidentalis. | tomato spotted wilt virus (tswv) is transmitted by thrips in a propagative manner; however, progression of virus infection in the insect is not fully understood. the goal of this work was to study the morphology and infection of thrips salivary glands. the primary salivary glands (psg) are complex, with three distinct regions that may have unique functions. analysis of tswv progression in thrips revealed the presence of viral proteins in the foregut, midgut, ligaments, tubular salivary glands (t ... | 2016 | 26999025 |
| role of the insect supervectors bemisia tabaci and frankliniella occidentalis in the emergence and global spread of plant viruses. | emergence of insect-transmitted plant viruses over the past 10-20 years has been disproportionately driven by two so-called supervectors: the whitefly, bemisia tabaci, and the western flower thrips, frankliniella occidentalis. high rates of reproduction and dispersal, extreme polyphagy, and development of insecticide resistance, together with human activities, have made these insects global pests. these supervectors transmit a diversity of plant viruses by different mechanisms and mediate virus ... | 2015 | 26958907 |
| symbiont-mediated rna interference in insects. | rna interference (rnai) methods for insects are often limited by problems with double-stranded (ds) rna delivery, which restricts reverse genetics studies and the development of rnai-based biocides. we therefore delegated to insect symbiotic bacteria the task of: (i) constitutive dsrna synthesis and (ii) trauma-free delivery. rnaseiii-deficient, dsrna-expressing bacterial strains were created from the symbionts of two very diverse pest species: a long-lived blood-sucking bug, rhodnius prolixus, ... | 2016 | 26911963 |
| automated video tracking of thrips behavior to assess host-plant resistance in multiple parallel two-choice setups. | piercing-sucking insects cause severe damage in crops. breeding for host-plant resistance can significantly reduce the yield losses caused by these insects, but host-plant resistance is a complex trait that is difficult to phenotype quickly and reliably. current phenotyping methods mainly focus on labor-intensive and time-consuming end-point measurements of plant fitness. characterizing insect behavior as a proxy for host-plant resistance could be a promising time-saving alternative to end-point ... | 2016 | 26788117 |
| continuous exposure to the deterrents cis-jasmone and methyl jasmonate does not alter the behavioural responses of frankliniella occidentalis. | behavioural responses of frankliniella occidentalis (pergande) (thysanoptera: thripidae), a generalist, cell sap-feeding insect species with piercing-sucking mouthparts, after continuous exposure to two deterrent secondary plant compounds are investigated. we compared in choice assays on bean leaf discs, the settling, feeding, and oviposition preferences of f. occidentalis females that had no experience with the two fatty acid derivatives methyl jasmonate and cis-jasmone before testing (naïve th ... | 2016 | 26726263 |
| context-dependent alarm signalling in an insect. | animals often respond to danger by raising alarm to inform others. alarm signals come in many different forms, such as visual or mechanical display, sound or odour. some animals produce vocal alarm signals that vary with the level of danger. for chemical alarm signals, virtually nothing is known about such context-dependent signalling due to a general notion that alarm pheromones have fixed compositions. here, we show that larvae of the western flower thrips (frankliniella occidentalis) produce ... | 2016 | 26688127 |
| field-evolved resistance to insecticides in the invasive western flower thrips frankliniella occidentalis (pergande) (thysanoptera: thripidae) in china. | to understand the current status of insecticide resistance of the invasive western flower thrips, frankliniella occidentalis, in china, the responses of six field populations to six commonly used insecticides, i.e. spinosad, spinetoram, cyantraniliprole, imidacloprid, acetamiprid and pyriproxyfen, were evaluated in comparison with a susceptible laboratory strain. | 2016 | 26617067 |
| effects of interplanting flowering plants on the biological control of corn earworm (lepidoptera: noctuidae) and thrips (thysanoptera: thripidae) in sweet corn. | natural enemy exploitation of food resources and alternative hosts in noncrop vegetation has been shown to be an effective means of enhancing natural enemy populations in diversified agro-ecosystem. field trials were conducted in hawaii to examine effects of interplanting flowering plants on 1) parasitism of corn earworm, helicoverpa zea (boddie) eggs by trichogramma spp., and 2) abundance of orius spp. in relation to prey (h. zea eggs and thrips [primarily, frankliniella occidentalis (pergande) ... | 2016 | 26500338 |
| proteomic analysis reveals resistance mechanism against chlorpyrifos in frankliniella occidentalis (thysanoptera: thripidae). | the western flower thrips is an economically important worldwide pest of many crops, and chlorpyrifos has been used to control western flower thrips for many years. to develop a better resistance-management strategy, a chlorpyrifos-resistant strain of western flower thrips (wft-chl) was selected in the laboratory. more than 39-fold resistance was achieved after selected by chlorpyrifos for 19 generations in comparison with the susceptible strain (wft-s). proteome of western flower thrips (wft-s ... | 2015 | 26470346 |
| insecticide rotation programs with entomopathogenic organisms for suppression of western flower thrips (thysanoptera: thripidae) adult populations under greenhouse conditions. | western flower thrips, frankliniella occidentalis (pergande), is one of the most destructive insect pests of greenhouse production systems with the ability to develop resistance to a wide variety of insecticides. a common resistance management strategy is rotating insecticides with different modes of action. by incorporating entomopathogenic organisms (fungi and bacteria), which have discrete modes of action compared to standard insecticides, greenhouse producers may preserve the effectiveness o ... | 2015 | 26470338 |
| life history characteristics of frankliniella occidentalis and frankliniella intonsa (thysanoptera: thripidae) in constant and fluctuating temperatures. | frankliniella occidentalis (pergande) and frankliniella intonsa (trybom) are sympatric pests of many greenhouse and field crops in korea. we compared the influence of constant (27.3°c) and fluctuating temperatures (23.8-31.5°c, with an average of 27.3°c) on the life table characteristics of f. occidentalis and f. intonsa held at a photoperiod of 16:8 (l:d) h and 45±5% relative humidity. the development times of both f. occidentalis and f. intonsa were significantly affected by temperature fluctu ... | 2015 | 26470222 |
| sublethal effects of beauveria bassiana (ascomycota: hypocreales) on life table parameters of frankliniella occidentalis (thysanoptera: thripidae). | we assessed effects of parental exposure to beauveria bassiana on life history traits of subsequent generations of western flower thrips, frankliniella occidentalis (pergande) (thysanoptera: thripidae). progeny from individuals that survived fungal exposure as second instars had significantly shorter egg stages, but longer prepupal development times than corresponding untreated controls. however, survivorship to adulthood of these progeny groups did not differ. although fecundities of the parent ... | 2015 | 26470219 |
| diversity of thrips species and vectors of tomato spotted wilt virus in tomato production systems in kenya. | thrips have been recognized as primary vectors of tomato spotted wilt virus (tswv) with frankliniella occidentalis (pergande) reported as the most important and efficient vector, while other species such as thrips tabaci lindeman also include populations that can vector the virus. a study was undertaken to establish the diversity of thrips and presence of vectors for tswv in four major tomato production areas in kenya. the cytochrome oxidase 1 (co1) gene was used to generate sequences from thrip ... | 2015 | 26470099 |
| optimizing western flower thrips management on french beans by combined use of beneficials and imidacloprid. | western flower thrips (wft), frankliniella occidentalis (pergande), is an important pest of vegetable crops worldwide and has developed resistance to many insecticides. the predatory mites neoseiulus (=amblyseius) cucumeris (oudemans), the entomopathogenic fungus metarhizium anisopliae (metsch.), and an insecticide (imidacloprid) were tested for their efficacy to reduce wft population density and damage to french bean (phaseolus vulgaris l.) pods under field conditions in two planting periods. m ... | 2015 | 26463079 |
| susceptibility of dalotia coriaria (kraatz) (coleoptera: staphylinidae) to entomopathogenic nematodes (rhabditida: heterorhabditidae and steinernematidae). | dalotia coriaria (kraatz) (coleoptera: staphylinidae) and entomopathogenic nematodes (rhabditida: heterorhabditidae and steinernematidae) are two soil-dwelling biological control agents used to manage western flower thrips, frankliniella occidentalis (pergande) (thysanoptera: thripidae) and fungus gnats bradysis spp. (diptera: sciaridae) in glasshouses. growers often use multiple natural enemies to achieve economic control, but knowledge of interactions among natural enemies is lacking. we condu ... | 2015 | 26463077 |
| effect of spinosad resistance on transmission of tomato spotted wilt virus by the western flower thrips (thysanoptera: thripidae). | tomato spotted wilt virus (tswv) is transmitted by frankliniella occidentalis (pergande) in a persistent-propagative manner. we previously observed significant results in terms of feeding behavior of spinosad-susceptible (ivf03) and -resistant (spin-r) strains of f. occidentalis using electrical penetration graph. tswv transmission by the two strains was compared in the present study. the results showed that the titer of tswv-n rna (a part of s rna of tswv and encoding the nucleocapsid protein) ... | 2016 | 26377766 |
| thrips transmission of tospoviruses. | one hundred years ago, the disease tomato spotted wilt was first described in australia. since that time, knowledge of this disease caused by tomato spotted wilt virus (tswv) and transmitted by thrips (insects in the order thysanoptera) has revealed a complex relationship between the virus, vector, plant host, and environment. numerous tospoviruses and thrips vectors have been described, revealing diversity in plant host range and geographical distributions. advances in characterization of the t ... | 2015 | 26340723 |
| systemic above- and belowground cross talk: hormone-based responses triggered by heterodera schachtii and shoot herbivores in arabidopsis thaliana. | above- and belowground plant parts are simultaneously attacked by different pests and pathogens. the host mediates these interactions and physiologically reacts, e.g. with local and systemic alterations of endogenous hormone levels coupled with coordinated transcriptional changes. this in turn affects attractiveness and susceptibility of the plant to subsequent attackers. here, the model plant arabidopsis thaliana is used to study stress hormone-based systemic responses triggered by simultaneous ... | 2015 | 26324462 |
| development of species-specific primers for agronomical thrips and multiplex assay for quarantine identification of western flower thrips. | while morphological identification of thrips species has been difficult because of their minute size and a lack of easily recognizable characteristics, molecular identification based on the development of specific molecular markers can be easily and reliably carried out. among the known molecular markers, the nuclear internal transcribed spacer (its) exhibits distinguishable variations among thrips species. in this study, sequences of its2 region of 10 agriculturally important thrips were establ ... | 2014 | 26309260 |
| stable reference gene selection for rt-qpcr analysis in nonviruliferous and viruliferous frankliniella occidentalis. | reverse transcriptase-quantitative polymerase chain reaction (rt-qpcr) is a reliable technique for measuring and evaluating gene expression during variable biological processes. to facilitate gene expression studies, normalization of genes of interest relative to stable reference genes is crucial. the western flower thrips frankliniella occidentalis (pergande) (thysanoptera: thripidae), the main vector of tomato spotted wilt virus (tswv), is a destructive invasive species. in this study, the exp ... | 2015 | 26244556 |
| sternal gland structures in males of bean flower thrips, megalurothrips sjostedti, and poinsettia thrips, echinothrips americanus, in comparison with those of western flower thrips, frankliniella occidentalis (thysanoptera: thripidae). | sternal pores are important features for identification of male thrips, especially within the subfamily thripinae. they vary in shape, size and distribution even between species of one genus. their functional role is speculated to be that of sex- and/or aggregation pheromone production. yet, sexual aggregations are not reported in echinothrips americanus, known to have sternal pores, while we observed aggregations in megalurothrips sjostedti, previously reported to lack them. we examined the ste ... | 2015 | 26215363 |
| minute pollinators: the role of thrips (thysanoptera) as pollinators of pointleaf manzanita, arctostaphylos pungens (ericaceae). | the feeding habits of thrips on plant tissue, and their ability to transmit viral diseases to their host plants, have usually placed these insects in the general category of pests. however, the characteristics that make them economically important, their high abundance and short- and long-distance movement capability, may also make them effective pollinators. we investigated this lesser-known role of thrips in pointleaf manzanita (arctostaphylos pungens), a southwestern us shrub. we measured the ... | 2017 | 26207155 |
| draft genomes, phylogenetic reconstruction, and comparative genomics of two novel cohabiting bacterial symbionts isolated from frankliniella occidentalis. | obligate bacterial symbionts are widespread in many invertebrates, where they are often confined to specialized host cells and are transmitted directly from mother to progeny. increasing numbers of these bacteria are being characterized but questions remain about their population structure and evolution. here we take a comparative genomics approach to investigate two prominent bacterial symbionts (bfo1 and bfo2) isolated from geographically separated populations of western flower thrips, frankli ... | 2015 | 26185096 |
| feeding on beauveria bassiana-treated frankliniella occidentalis causes negative effects on the predatory mite neoseiulus barkeri. | the entomopathogenic fungus beauveria bassiana and the predatory mite neoseiulus barkeri are both potential biocontrol agents for their shared host/prey frankliniella occidentalis. the combination of the two agents may enhance biological control of f. occidentalis if the fungus does not negatively affect n. barkeri. this study evaluated the indirect effects of b. bassiana strain sz-26 on n. barkeri mediated by f. occidentalis using the age-stage, two-sex life table. when fed on the first instar ... | 2015 | 26153532 |
| qtl mapping of thrips resistance in pepper. | a qtl for thrips resistance on pepper chromosome 6 was identified and validated. this qtl affects thrips larval development and explains 50% of the variation. thrips is one of the most damaging pests in pepper (capsicum). resistance to thrips was identified in capsicum annuum. this study was aimed at the elucidation of the genetic background of thrips resistance in capsicum through qtl mapping. the qtl analysis was carried out for frankliniella occidentalis resistance in an f2 population consist ... | 2015 | 26152569 |
| biotic resistance limits the invasiveness of the western flower thrips, frankliniella occidentalis (thysanoptera: thripidae), in florida. | the spread of the western flower thrips, frankliniella occidentalis (pergande), has resulted in the world-wide destabilization of established integrated pest management programs for many crops. it is hypothesized that frequent exposure to insecticides in intensive agriculture selected for resistant populations, which allowed invasive populations in the eastern usa to overcome biotic resistance from the native community of species. research conducted in florida to understand the role of biotic fa ... | 2016 | 26149353 |
| temporal genetic dynamics of an invasive species, frankliniella occidentalis (pergande), in an early phase of establishment. | many species can successfully colonize new areas despite their propagules having low genetic variation. we assessed whether the decreased genetic diversity could result in temporal fluctuations of genetic parameters of the new populations of an invasive species, western flower thrips, frankliniella occidentalis, using mitochondrial and microsatellite markers. this study was conducted in eight localities from four climate regions in china, where f. occidentalis was introduced in the year 2000 and ... | 2015 | 26138760 |
| risk assessment of genetically engineered maize resistant to diabrotica spp.: influence on above-ground arthropods in the czech republic. | transgenic maize mon88017, expressing the cry3bb1 toxin from bacillus thuringiensis (bt maize), confers resistance to corn rootworms (diabrotica spp.) and provides tolerance to the herbicide glyphosate. however, prior to commercialization, substantial assessment of potential effects on non-target organisms within agroecosystems is required. the mon88017 event was therefore evaluated under field conditions in southern bohemia in 2009-2011, to detect possible impacts on the above-ground arthropod ... | 2015 | 26083254 |
| within-crop air temperature and humidity outcomes on spatio-temporal distribution of the key rose pest frankliniella occidentalis. | frankliniella occidentalis (pergande) is a key pest of various crops worldwide. in this study, we analyse the dependence of the infestation of this pest on spatially distributed micro climatic factors in a rose greenhouse. despite the importance of this subject, the few existing studies have been realized in laboratory rather than in greenhouse conditions. however, recent progress on greenhouse microclimate characterisation has highlighted the strong indoor climate heterogeneity that may influen ... | 2015 | 26011275 |
| demonstration of an adaptive response to preconditioning frankliniella occidentalis (pergande) to sublethal doses of spinosad: a hormetic-dose response. | sublethal doses of some insecticides have been reported to either stimulate or reduce the survival and fecundity of insects. many sublethal-effect studies have been conducted after exposure of only one generation to sublethal insecticides, and there is little information about the sublethal effects on insects after long-term exposure to sublethal insecticides. in this study, changes in biological characteristics were investigated in spinosad-susceptible (spin-s) and sublethal-spinosad-treated (s ... | 2015 | 25910608 |
| rna interference tools for the western flower thrips, frankliniella occidentalis. | the insect order thysanoptera is exclusively comprised of small insects commonly known as thrips. the western flower thrips, frankliniella occidentalis, is an economically important pest amongst thysanopterans due to extensive feeding damage and tospovirus transmission to hundreds of plant species worldwide. geographically-distinct populations of f. occidentalis have developed resistance against many types of traditional chemical insecticides, and as such, management of thrips and tospoviruses a ... | 2015 | 25796097 |
| detection of the quarantine species thrips palmi by loop-mediated isothermal amplification. | thrips palmi (from the order thysanoptera) is a serious insect pest of various crops, including vegetables, fruits and ornamental plants, causing significant economic losses. its presence constitutes a double threat; not only does t. palmi feed on the plants, it is also a vector for several plant viruses. t. palmi originated in asia, but has spread to north and central america, africa, oceania and the caribbean in recent decades. this species has been sporadically noted in europe and is under qu ... | 2015 | 25793743 |
| a new attractant for monitoring western flower thrips, frankliniella occidentalis in protected crops. | monitoring of pest populations is an essential component of integrated pest management. an early warning system helps growers decide when best to take control measures, or when to alter them, should a control method prove inadequate. studies have shown that adding chemical attractants to sticky cards can increase trap catch of western flower thrips, frankliniella occidentalis, a global pest of agriculture and horticulture, giving more accurate accounts of population size and dynamics, thus leadi ... | 2015 | 25763301 |
| supplemental food for amblyseius swirskii in the control of thrips: feeding friend or foe? | in integrated pest management systems in greenhouse crops, the predatory mite amblyseius swirskii is becoming increasingly important as a biological control agent of various pests, especially thrips and whiteflies. an emerging strategy to promote the predator's establishment and retention in the crop consists in providing food supplements. however, when faced with omnivorous pests, such as the western flower thrips, frankliniella occidentalis, food supplements need to be applied with extreme car ... | 2016 | 25755020 |
| an evaluation of frankliniella occidentalis (thysanoptera: thripidae) and frankliniella intonsa (thysanoptera: thripidae) performance on different plant leaves based on life history characteristics. | to compare the performance of frankliniella occidentalis (pergande) and native frankliniella intonsa (trybom) on cucumber and tomato leaves in laboratory, life history characters were investigated, and life tables were constructed using the method of age-stage, two-sex table life. compared with tomato leaf, there were shorter total preoviposition period (tpop), higher fecundity, longer female longevity, and higher intrinsic rate of increase (r) of both f. occidentalis and f. intonsa on cucumber ... | 2015 | 25673049 |
| understanding trophic interactions of orius spp. (hemiptera: anthocoridae) in lettuce crops by molecular methods. | the aphid nasonovia ribisnigri (mosley) (hemiptera: aphididae) and the thrips frankliniella occidentalis (pergande) (thysanoptera: thripidae) are common pests in mediterranean lettuce crops, where orius spp. are common generalist predators. predation by orius spp. was studied in a lettuce plot by conventional polymerase chain reaction (pcr) and real-time pcr analyses using specific primers of both main pests. also, high-throughput sequencing was used to have a wider approach of the diet of these ... | 2016 | 25641943 |
| identification, expression profiling and fluorescence-based binding assays of a chemosensory protein gene from the western flower thrips, frankliniella occidentalis. | using rt-pcr and race-pcr strategies, we cloned and identified a new chemosensory protein (focccsp) from the western flower thrips, frankliniella occidentalis, a species for which no chemosensory protein (csp) has yet been identified. the focccsp gene contains a 387 bp open-reading frame encoding a putative protein of 128 amino acids with a molecular weight of 14.51 kda and an isoelectric point of 5.41. the deduced amino acid sequence contains a putative signal peptide of 19 amino acid residues ... | 2015 | 25635391 |
| preferences of the peripheral olfactory system of western flower thrips, frankliniella occidentalis towards stereoisomers of common plant volatiles. | stereochemistry plays a significant role in structure-activity relationships of messenger chemicals. the ability to distinguish between enantiomers and geometric isomers, however, may be limited to certain stereoisomeric substances, depending on the receiver. in this study, we assessed the preference of the peripheral olfactometry system of western flower thrips, f. occidentalis towards ubiquitously expressed host compounds, with a goal of establishing whether particular stereoisomers enhance ho ... | 2017 | 25598579 |
| amblyseius swirskii: what made this predatory mite such a successful biocontrol agent? | the predatory mite amblyseius swirskii quickly became one of the most successful biocontrol agents in protected cultivation after its introduction into the market in 2005 and is now released in more than 50 countries. there are several key factors contributing to this success: (1) it can control several major pests including the western flower thrips, frankliniella occidentalis, the whiteflies bemisia tabaci and trialeurodes vaporariorum and the broad mite, polyphagotarsonemus latus, simultaneou ... | 2015 | 25524511 |
| life cycle of cosmolaelaps jaboticabalensis (acari: mesostigmata: laelapidae) on frankliniella occidentalis (thysanoptera: thripidae) and two factitious food sources. | the aim of this work was to study the life cycle of cosmolaelaps jaboticabalensis moreira, klompen and moraes preying on frankliniella occidentalis (pergande) (thysanoptera: thripidae), a serious cosmopolitan pest of different crops, as well as on protorhabditis sp. (nematoda: rhabditidae) and tyrophagus putrescentiae (astigmatina: acaridae), prospective factitious foods for the mass rearing of the predator. experiments were conducted in a chamber at 25 ± 1 °c, 70 ± 10 % rh and in the dark. tota ... | 2015 | 25491292 |
| intra- and interspecific competition between western flower thrips and sweetpotato whitefly. | the western flower thrips, frankliniella occidentalis (pergande), and the sweetpotato whitefly, bemisia tabaci (gennadius), are both invasive insect pests and are present in most of the same agricultural crops without a clear dominance of either species. here, intra- and interspecific competition in b. tabaci and f. occidentalis was determined under controlled experiments. the results showed that intraspecific competition was distinct in f. occidentalis and that the co-occurrence of b. tabaci ha ... | 2014 | 25480973 |
| evaluation of various types of supplemental food for two species of predatory mites, amblyseius swirskii and neoseiulus cucumeris (acari: phytoseiidae). | although phytoseiids are best known as predators of phytophagous mites and other small arthropods, several species can also feed and reproduce on pollen. in laboratory assays, we assessed the profitability of two types of dietary supplements (three pollen species-cattail, maize and apple-and eggs of the mediterranean flour moth, ephestia kuehniella) for the two species of predatory mites most commonly used as biocontrol agents in horticulture in canada, neoseiulus cucumeris and amblyseius swirsk ... | 2015 | 25430552 |
| apple pollen as a supplemental food source for the control of western flower thrips by two predatory mites, amblyseius swirskii and neoseiulus cucumeris (acari: phytoseiidae), on potted chrysanthemum. | it has been shown that pollen as a dietary supplement may increase the establishment (development and reproduction) and survival of phytoseiid predatory mites, and therefore the pest control these mites can provide. in this study, the role of apple pollen as a supplemental food source was assessed as a means to increase the efficiency of two predatory mite species, neoseiulus cucumeris and amblyseius swirskii, for control of western flower thrips, frankliniella occidentalis, under greenhouse con ... | 2015 | 25420686 |
| host plant effects on activities of detoxification enzymes and insecticide tolerance in western flower thrips, frankliniella occidentalis (insecta). | the polyphagous western flower thrips, frankliniella occidentalis, is a severe pest of horticultural crops. individuals from a laboratory population adapted to bean plants were transferred to new host plants, sweet pepper and chrysanthemum, to establish two new populations. the thrips appeared to perform poorly on the new host plants, as the total protein content of individual adults was lowered in the new populations. the specific activities of two insect detoxification enzyme systems, esterase ... | 2014 | 25419932 |
| seasonal climatic variations influence the efficacy of predatory mites used for control of western flower thrips in greenhouse ornamental crops. | the influence of seasonal greenhouse climate on the efficacy of predatory mites for thrips control was determined for potted chrysanthemum. trials in controlled environment chambers, small-scale greenhouses and commercial greenhouses were conducted to determine which biological control agent-that is, amblyseius swirskii athias-henriot or neoseiulus cucumeris (oudemans)-is more efficacious for control of western flower thrips, frankliniella occidentalis (pergande), in different seasons. under sim ... | 2015 | 25408478 |
| evaluation and validation of reference genes for qrt-pcr normalization in frankliniella occidentalis (thysanoptera: thripidae). | quantitative real time pcr (qrt-pcr) has emerged as a reliable and reproducible technique for studying gene expression analysis. for accurate results, the normalization of data with reference genes is particularly essential. once the transcriptome sequencing of frankliniella occidentalis was completed, numerous unigenes were identified and annotated. unfortunately, there are no studies on the stability of reference genes used in f. occidentalis. in this work, seven candidate reference genes, inc ... | 2014 | 25356721 |
| supplemental food that supports both predator and pest: a risk for biological control? | supplemental food sources to support natural enemies in crops are increasingly being tested and used. this is particularly interesting for generalist predators that can reproduce on these food sources. however, a potential risk for pest control could occur when herbivores also benefit from supplemental food sources. in order to optimize biological control, it may be important to select food sources that support predator populations more than herbivore populations. in this study we evaluated the ... | 2015 | 25349063 |
| compatibility of reduced-risk insecticides with the non-target predatory mite iphiseius degenerans (acari: phytoseiidae). | iphiseius degenerans (berlese) (acari: phytoseiidae) is a common predatory mite in citrus orchards in some areas of the mediterranean basin and an important biological control agent of the thrips frankliniella occidentalis (pergande) in integrated pest management (ipm) programmes in greenhouse crops. in this study, we evaluated the effects of the 'reduced-risk' insecticides acetamiprid, chlorantraniliprole, flubendiamide, metaflumizone, methoxyfenozide, spinetoram and thiamethoxam on i. degenera ... | 2015 | 25298132 |
| habituation in frankliniella occidentalis to deterrent plant compounds and their blends. | feeding and oviposition deterrence of three secondary plant compounds and their 1:1 blends to adult female frankliniella occidentalis pergande (thysanoptera: thripidae) and the potential for habituation of the thrips to the pure compounds and the 1:1 blends at various concentrations were investigated. in choice assays, we tested dose-dependent feeding and oviposition deterrence of the two fatty acid derivatives methyl jasmonate and cis-jasmone, the phenylpropanoid allylanisole, and their blends ... | 2014 | 25253898 |
| molecular assessment of predation by hoverflies (diptera: syrphidae) in mediterranean lettuce crops. | hoverflies (diptera: syrphidae) are generalist predators of a great variety of pests. nasonovia ribisnigri (hemiptera: aphididae) and frankliniella occidentalis (thysanoptera: thripidae) are two common pests in mediterranean lettuce crops, where they occur alongside alternative prey (e.g., collembola). a semi-field experiment was conducted in an experimental lettuce plot where hoverfly predation on n. ribisnigri, f. occidentalis and collembola was studied by conventional pcr and qpcr using speci ... | 2015 | 25236922 |
| effects of heat stress on survival of frankliniella occidentalis (thysanoptera: thripidae) and thrips tabaci (thysanoptera: thripidae). | temperature is known to play a crucial role in the population dynamics of insects. insects have evolved different mechanisms to resist unfavorable extreme temperatures. in recent years, western flower thrips, frankliniella occidentalis (pergande) (thysanoptera: thripidae), and onion thrips, thrips tabaci (lindeman) (thysanoptera: thripidae), have caused significant damage to vegetable crops. because of global warming and expanding areas of vegetable cultivation, a study of the effects of heat st ... | 2014 | 25195431 |
| thiamethoxam resistance selected in the western flower thrips frankliniella occidentalis (thysanoptera: thripidae): cross-resistance patterns, possible biochemical mechanisms and fitness costs analysis. | the western flower thrips (wft) frankliniella occidentalis (pergande) (thysanoptera: thripidae), an important pest of various crops in the world, has invaded china since 2003. to understand the risks and to determine possible mechanisms of resistance to thiamethoxam in wft, a resistant strain was selected under the laboratory conditions. cross-resistance and the possible biochemical resistance mechanisms were investigated in this study. a 15.1-fold thiamethoxam-resistant wft strain (th-r) was es ... | 2014 | 25175655 |
| spinosad resistance, esterase isoenzymes and temporal synergism in frankliniella occidentalis (pergande) in australia. | spinosad has been widely used in australia to control western flower thrips frankliniella occidentalis (pergande) but spinosad usefulness is now compromised by resistance. here we studied a highly spinosad resistant strain of f. occidentalis to explore if esterases had a role in spinosad resistance. enhanced esterase activity in pressured spinosad-resistant f. occidentalis was confirmed via page electrophoresis and estimated to be approximately three times higher than that in a susceptible strai ... | 2014 | 25175647 |
| resistance breaking tomato spotted wilt virus isolates on resistant pepper varieties in italy. | in spring 2012, resistance breaking (rb) isolates of tomato spotted wilt virus (tswv) that overcome the resistance conferred by the tsw gene in different pepper hybrids have been recovered in different locations in southern italy (campania and apulia regions) in protected cultivation, about one month after transplant. the percentage of symptomatic plants was 5-10% and, only in particular cases of advanced stage of cultivation, it reached 30-50% at the end of cycle. all tswv isolates induced simi ... | 2013 | 25151838 |
| cyantraniliprole: a valuable tool for frankliniella occidentalis (pergande) management. | frankliniella occidentalis is a worldwide economically important pest. scarcity of effective products and cross-resistance issues make resistance to existing insecticides a recurring problem that requires the development of new control tools, such as incorporating novel compounds. lethal effects of cyantraniliprole on adults and larvae from field and insecticide-resistant populations were evaluated. in addition, the sublethal effects on biological features such as fecundity, fertility, feeding, ... | 2015 | 25138907 |