| effect of 2,4,5-trichlorophenoxy acetic acid on hatchability of thrips tabaci lind eggs. | | 1970 | 5531108 |
| the route of tomato spotted wilt virus inside the thrips body in relation to transmission efficiency. | the route of tomato spotted wilt virus (tswv) in the body of its vectors, frankliniella occidentalis and thrips tabaci (thysanoptera: thripidae) was studied during their development. first instar larvae were allowed, immediately upon hatching, to acquire virus from mechanically infected datura stramonium plants for 24 h. the rate of transmission by adults was determined in inoculation access feeding test on emilia sonchifolia leaf disks. thrips tissues were analysed for infection at 24 h interva ... | 2002 | 12417949 |
| role of mites and thrips in the agrobiocoenosis of the soybean. | soy beans dangerous pests are mites and thrips, that is why the present paper aims at the examination of the changes in their numbers and dominance relations of some varieties of different maturity groups. the small plot experiments were conducted in kisalföld region with the following soybean varieties: early ripening bólyi 38, evans, mccall, middle ripening bólyi 45 and late ripening eszter, zsuzsanna and borza, in mosonmagyaróvár. mites and thrips were collected every week with berlese-extrac ... | 2003 | 15149112 |
| host-associated genetic differentiation in thrips tabaci (insecta; thysanoptera), as determined from mtdna sequence data. | we tested for host-associated genetic differentiation in 22 populations of thrips tabaci collected from tobacco and leek, respectively. clustering analyses and haplotype networks based on sequence variation at a fragment of the mitochondrial cytochrome oxidase i gene yielded three major evolutionary lineages; two were clearly associated with leek and the third with tobacco. these genetic findings corroborated recent experimental observations on the heterogeneity of t. tabaci populations with reg ... | 2004 | 15241445 |
| oral toxicity of photorhabdus toxins against thrips species. | the oral toxicity of excretion products of several photorhabdus and xenorhabdus strains was tested on two thrips species: frankliniella occidentalis and thrips tabaci. out of 46 photorhabdus isolates and six xenorhabdus isolates only six north american p. temperata isolates were toxic to the thrips species. after 7 days of drinking from p. temperata supernatant a mortality of 90% could be reached. thrips were also killed after sucking from leaves covered with the toxins. toxins have a negative e ... | 2005 | 15955338 |
| the effect of undersowing cabbage with white clover on thrips infestation and flight activity. | in 2001-2003, the levels of infestation of thrips in cabbage monocrops and cabbage/white clover intercrops were compared. the flight activity of thrips was monitored using blue sticky traps and white water traps to obtain a better understanding of population dynamics of thrips. plant samples were taken to record the number of thrips on cabbage. over the years of observations, the highest number of thrips was collected in blue sticky traps on cabbage undersown with white clover. in the period fro ... | 2005 | 16628886 |
| temperature and precipitation affect seasonal patterns of dispersing tobacco thrips, frankliniella fusca, and onion thrips, thrips tabaci (thysanoptera: thripidae) caught on sticky traps. | effects of temperature and precipitation on the temporal patterns of dispersing tobacco thrips, frankliniella fusca, and onion thrips, thrips tabaci, caught on yellow sticky traps were estimated in central and eastern north carolina and eastern virginia from 1997 through 2001. the impact that these environmental factors had on numbers of f. fusca and t. tabaci caught on sticky traps during april and may was determined using stepwise regression analysis of 43 and 38 site-years of aerial trapping ... | 2008 | 18348799 |
| interaction effects between beauveria bassiana and imidacloprid against thrips tabaci (thysanoptera: thripidae). | the onion thrips, thrips tabaci lindeman is a major pest of many horticultural crops in many parts of the world. the entomopathogenic fungus beauveria bassiana (balsamo) vuillemin and imidacloprid are used for the control of the onion thrips. the potential interactions between the fungus and the chemical against the onion thrips adults were evaluated in a laboratory and two greenhouse bioassays. the laboratory bioassay was a leaf dip bioassay for a mixture of b. bassiana and imidacloprid. the fi ... | 2007 | 18399487 |
| evaluation of sampling methodology for determining the population dynamics of onion thrips (thysanoptera: thripidae) in ontario onion fields. | onion thrips, thrips tabaci lindeman, are an economic pest of alliums worldwide. in ontario onion-growing regions, seasonal abundance and population trends of onion thrips are not well known. the objectives of this research were to investigate onion thrips population dynamics by using both white sticky traps and plant counts, to gain insight into flight height, and to determine the genus and sex of thrips fauna present in monitored fields. adult thrips were captured on white sticky traps placed ... | 2005 | 16539160 |
| resistance of thrips tabaci to pyrethroid and organophosphorus insecticides in ontario, canada. | onion thrips, thrips tabaci lindeman, were collected from commercial onion fields in 2001, 2002 and 2003 to assess resistance to lambda-cyhalothrin, deltamethrin and diazinon. in 2001, six of eight adult populations were resistant to lambda-cyhalothrin, with resistance ratios (rr) ranging from 2 to 13.1 and four of these were also resistant to deltamethrin, with rr ranging from 19.3 to 120. three of four adult populations were resistant to diazinon with rr ranging from 2.5 to 165.8. in 2002, fou ... | 2005 | 15912565 |
| investigation on the optimal term of one-fold insecticide application for decreasing onion thrips ( thrips tabaci lindeman, thysanoptera, thripidae) damage on early white cabbage. | an impact of the term of one-fold insecticide application to reduce the damage of the onion thrips in early white cabbage was established. during the growing season plants were treated with insecticide (abamectin) in three different terms (treatment 1: 9 june, treatment 2: 16 june, treatment 3: 23 june, and treatment 4: untreated). on the exterior leaves of cabbage heads, treated with the insecticide, statistically significantly lower mean index of damage was determined as compared to the untrea ... | 2004 | 15759423 |
| preliminary evaluation of the effectiveness of a verticillium lecanii isolate in the control of thrips tabaci (thysanoptera: thripidae). | thrips tabaci is a polyphagous pest that attacks many different crop and ornamental plant species. recently, the need to reduce the use of insecticides in the control of thrips is more and more increasing. on that account, the possibility to make use of the entomopathogenic fungus verticillium lecanii (daom198499) was evaluated in laboratory conditions. suspension of 10(3) to 10(7) conidia/ml grown in liquid culture medium with a control (distilled water) treated on second larval stage of t. tab ... | 2004 | 15759414 |
| thrips (thysanoptera: thripidae, phlaeothripidae) damaging peach in paranapanema, são paulo state, brazil. | seeking to identify thrips species associated to peach and the injuries they cause, plants of aurora and tropic beauty cultivars were weekly monitored, from may to august of 2005, in holambra ii district, in paranapanema, sp. flowers and fruits from six plants per hectare were sampled by the hitting technique. frankliniella occidentalis (pergande), f. schultzei (trybom), f. gardenia (moulton), f. condei john, f. insularis (franklin) and thrips tabaci lindeman, in thripidae, and haplothrips gowde ... | 2008 | 18813753 |
| the efficiency by which thrips tabaci populations transmit tomato spotted wilt virus depends on their host preference and reproductive strategy. | abstract arrhenotokous and thelytokous populations of thrips tabaci from tobacco or leek plants were evaluated for their ability to transmit tomato spotted wilt virus (tswv) and for their host preference. transmission efficiencies were comparatively studied using leaf disks of petunia hybrida, datura stramonium, and nicotiana tabacum cv. basmas. adults of arrhenotokous populations collected on infected tobacco plants in the field were efficient transmitters (up to 48.5% transmission) and remaine ... | 2002 | 18944256 |
| testing the efficacy of different insecticides to control onion thrips (thrips tabaci lindeman, thysanoptera, thripidae) in onion crops. | onion thrips (thrips tabaci) has become important pest in onion crops in slovenia. because it is a polyphagous species, it causes damage also in vegetable production in general (leek, cabbage, ornamentals etc.). the group of efficient insecticides for thrips control in slovenia is limited, because its misusage in the past caused the development of resistance of this pest. in 2002, eight different insecticides based on four active substances was tested in goriska region. the results of field expe ... | 2003 | 15149121 |
| origin of intra-individual variation in pcr-amplified mitochondrial cytochrome oxidase i of thrips tabaci (thysanoptera: thripidae): mitochondrial heteroplasmy or nuclear integration? | the mitochondrial genome is increasingly being used as a species diagnostic marker in insects. typically, genomic dna is pcr amplified and then analysed by restriction analyses or sequencing. this analysis system may cause some serious problems for molecular diagnosis. besides the errors introduced by the pcr process, mtdna sequence variation of amplified fragments may originate from mtdna heteroplasmy or from nuclear integrations of mtdna fragments, both of which have been shown to occur in ins ... | 2004 | 15061785 |
| regional and temporal variation in susceptibility to lambda-cyhalothrin in onion thrips, thrips tabaci (thysanoptera: thripidae), in onion fields in new york. | populations of onion thrips, thrips tabaci lindeman, from commercial onion fields in new york were evaluated for their susceptibility to the commonly used pyrethroid, lambda-cyhalothrin (warrior t), using a novel system called the thrips insecticide bioassay system (tibs). to use tibs, thrips are collected directly from the plant into an insecticide-treated 0.5-ml microcentrifuge tube that has a flexible plastic cap with a small well into which 0.08 ml of a 10% sugar-water solution with food col ... | 2003 | 14977125 |
| effects of a juvenile hormone analog, pyriproxyfen, on thrips tabaci (thysanoptera: thripidae). | effects of a juvenile hormone analog, pyriproxyfen, on various developmental stadia of the onion thrips, thrips tabaci lindeman, were determined on cabbage leaves in the laboratory. pyriproxyfen was applied at 0.064 or 0.128 g ai liter(-1) on leaves (residual contact-ingestion), thrips (direct contact) and leaf-thrips (residue contact-ingestion-direct contact). pyriproxyfen did not have any significant lethal effects on thrips pupae in any treatment. lethal effects on thrips larvae varied depend ... | 2003 | 12916771 |
| investigating the effect of invasion characteristics on onion thrips (thysanoptera: thripidae) populations in onions with a temperature-driven process model. | a temperature-driven process model was developed to describe the seasonal patterns of populations of onion thrips, thrips tabaci lindeman, in onions. the model used daily cohorts (individuals of the same developmental stage and daily age) as the population unit. stage transitions were modeled as a logistic function of accumulated degree-days to account for variability in development rate among individuals. daily survival was modeled as a logistic function of daily mean temperature. parameters fo ... | 2009 | 20021751 |
| development of a bioassay system for monitoring susceptibility in thrips tabaci. | a system is described for collecting adult and larva of thrips tabaci from onion foliage into insecticide-treated vials to evaluate susceptibility to insecticides. the thrips insecticide bioassay system (tibs) allows one to treat vials and store them for 3 weeks before thrips are collected. depending on the population density in the field, collection of the insects for the test required from 3-6 h for one person. assays are read after 24h. this system was used in 1997 and 1998 in commercial onio ... | 2003 | 12741523 |
| ecology and behavior of pezothrips kellyanus (thysanoptera: thripidae) on citrus. | the most common thrips species found in cyprus citrus orchards between 2003 and 2008 were pezothrips kellyanus (bagnall) (thysanoptera: thripidae), frankliniella occidentalis (pergande) (thysanoptera: thripidae), and thrips tabaci (lindeman) (thysanoptera: thripidae). only pezothrips kellyanus, kelly's citrus thrips (kct) causes feeding damage on citrus fruits in cyprus. kct adults prefer to concentrate mostly in the northern and eastern sides of both lemon and grapefruit canopies. the attractiv ... | 2010 | 20214367 |
| [research methods to biologically control thrips tabaci on leeks: results of a 5 year study in the north of calais]. | | 2001 | 12425051 |
| onion thrips, thrips tabaci, have gut bacteria that are closely related to the symbionts of the western flower thrips, frankliniella occidentalis. | it has been shown that many insects have enterobacteriaceae bacteria in their gut system. the western flower thrips, frankliniella occidentalis pergande [thysanoptera: thripidae], has a symbiotic relation with erwinia species gut bacteria. to determine if other thripidae species have similar bacterial symbionts, the onion thrips, thrips tabaci, was studied because, like f. occidentalis, it is phytophagous. contrary to f. occidentalis, t. tabaci is endemic in europe and biotypes have been describ ... | 2008 | 20298113 |
| factors determining vector competence and specificity for transmission of tomato spotted wilt virus. | the competence of a frankliniella occidentalis and a thrips tabaci population to transmit tomato spotted wilt virus (tswv) was analysed. adults of the f. occidentalis population transmitted this virus efficiently, whereas those of the thelytokous t. tabaci population failed to transmit. tswv replicated in the midgut of the larvae of both populations after ingestion of virus; however, lower amounts accumulated in t. tabaci larvae than in f. occidentalis larvae. the virus was almost undetectable i ... | 2002 | 11842261 |
| evaluation of onion cultivars for resistance to onion thrips (thysanoptera: thripidae) and iris yellow spot virus. | onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), a worldwide pest of onion, allium cepa l., can reduce onion yield by > 50% and be even more problematic when it transmits iris yellow spot virus (family bunyaviridae, genus tospovirus, iysv). because t. tabaci is difficult to control with insecticides and other strategies, field studies on onion, allium cepa l., resistance to t. tabaci and iysv were conducted in 2007 and 2008 in two locations in new york state. forty-nine cultivars ... | 2010 | 20568640 |
| in vitro spore formation and completion of the asexual life cycle of neozygites parvispora, an obligate biotrophic pathogen of thrips. | capilliconidia, the asexual secondary spores of neozygites parvispora (zygomycetes, entomophthorales) were produced in vitro either by entrapment of vegetative cells (hyphal bodies) in alginate pellets or after plating them onto water agar. cultivation of the fungus for 3 days in a medium lacking hemolymph increased spore production 30 to 40-fold, and about 10% of the cells produced capilliconidia. the in vitro produced capilliconidia were infectious to thrips tabaci and the fungus was reisolate ... | 2001 | 11716213 |
| response of omnivorous leafroller (lepidoptera: tortricidae) and onion thrips (thysanoptera: thripidae) to low-temperature storage. | eggs and first-fifth instars of omnivorous leafroller, platynota stultana walshingham, had a mean percentage survival to the adult stage of 60.7-95.2% for nonexposed immatures and 14.5-54.3% for immatures exposed to 1 wk at 0-1 degree c. exposures of 2-5 wk resulted in 0-6.7% survival, and a 6-wk exposure resulted in < 1% survival of all stages tested. a significant reduction in survival of all larval stages occurred between exposures of 0 and 1 wk and between 1 wk and 2-6 wk. survival of eggs a ... | 2000 | 10902368 |
| multiplication of tomato spotted wilt virus in primary cell cultures derived from two thrips species. | primary cell cultures prepared from embryos of the thrips species frankliniella occidentalis and thrips tabaci were tested for their potential to support replication of tomato spotted wilt virus (tswv). using polyclonal antibodies against the viral nucleocapsid protein (n) and indirect immunofluorescent staining, discrete spots with strong signals were observed in the cytoplasm at 48 h post-inoculation in the cell cultures of a f. occidentalis, and a t. tabaci population which failed to transmit ... | 1997 | 9178497 |
| olfactory responses of the predatory mites (n eoseiulus cucumeris) and insects (orius strigicollis ): to two different plant species infested with onion thrips (t hrips tabaci). | responses of neoseiulus cucumeris (a predatory mite) and the predatory insect orius strigicollis to volatiles associated with two different plant species infested with onion thrips, thrips tabaci, were examined in a y-tube olfactometer. both predators species showed a significant preference for volatiles from infested cucumber leaves without t. tabaci over clean air. however, they were not attracted to volatiles from uninfested cucumber leaves, artificially damaged cucumber leaves, or volatiles ... | 2008 | 18414949 |
| analysis of the thrips fauna (thysanoptera) on flowers of herbs. | studies of thysanoptera were realized at the agricultural experimental station in mydlniki near cracow over the years 2003-2005. this research work covers the observations of the species composition of thrips and the periods of the occurrence of the particulars species of thrips and their numerousness. the thrips were collected from flowers of valeriana officinalis l., hypericum perforatum l. and levisticum officinale koch. following thrips species dominated samples collected directly from plant ... | 2007 | 18399479 |
| integrated management of thrips tabaci (thysanoptera: thripidae) on onion in north-western italy: basic approaches for supervised control. | background: thrips tabaci lindeman (thysanoptera: thripidae) is a major pest on onion, allium cepa l., worldwide. in 2010, research was conducted in a commercial onion field in north-western italy in order (i) to evaluate the efficacy of different insecticides and of the sar activator acibenzolar-s-methyl, (ii) to correlate thrips infestation levels with bulb size and weight at harvest and (iii) to implement a reliable thrips sampling method. efficacy of the three active ingredients spinosad, la ... | 2011 | 21770013 |
| insects' rna profiling reveals absence of "hidden break" in 28s ribosomal rna molecule of onion thrips, thrips tabaci. | with an exception of aphids, insects' 28s rrna is thought to harbor a "hidden break" which cleaves under denaturing conditions to comigrate with 18s rrna band to exhibit a degraded appearance on native agarose gels. the degraded appearance confounds determination of rna integrity in laboratories that rely on gel electrophoresis. to provide guidelines for rna profiles, rna from five major insect orders, namely, diptera, hemiptera, thysanoptera, hymenoptera, and lepidoptera, was compared under den ... | 2015 | 25767721 |
| 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 |
| effects of bt cotton on thrips tabaci (thysanoptera: thripidae) and its predator, orius insidiosus (hemiptera: anthocoridae). | laboratory studies were conducted to investigate tritrophic transfer of insecticidal cry proteins from transgenic cotton to an herbivore and its predator, and to examine effects of these proteins on the predator's development, survival, and reproduction. cry1ac and cry2ab proteins from the bacterium bacillus thuringiensis (bt) produced in bollgard-ii (bg-ii, event 15985) cotton plants were acquired by thrips tabaci lindeman (thysanoptera: thripidae), an important sucking pest of cotton, and its ... | 2014 | 25026649 |
| colonization of onions by endophytic fungi and their impacts on the biology of thrips tabaci. | endophytic fungi, which live within host plant tissues without causing any visible symptom of infection, are important mutualists that mediate plant-herbivore interactions. thrips tabaci (lindeman) is one of the key pests of onion, allium cepa l., an economically important agricultural crop cultivated worldwide. however, information on endophyte colonization of onions, and their impacts on the biology of thrips feeding on them, is lacking. we tested the colonization of onion plants by selected f ... | 2014 | 25254657 |
| the occurrence and species composition of thrips (thysanoptera) on onion. | the aim of the present research work was to investigate the population density and species composition of thrips infesting crops of onion in south poland. the flight activity of thrips was monitored using blue sticky traps and plant samples were taken to record the number of adult and larvae of thrips on onion. in 2004 the thrips were caught into blue sticky traps from the start of june to the end of the first decade of september. the peak flight activity was noticed in the middle of july. in 20 ... | 2007 | 18399478 |
| molecular differences in the mitochondrial cytochrome oxidase i (mtcoi) gene and development of a species-specific marker for onion thrips, thrips tabaci lindeman, and melon thrips, t. palmi karny (thysanoptera: thripidae), vectors of tospoviruses (bunyaviridae). | a quick and developmental-stage non-limiting method of the identification of vectors of tospoviruses, such as thrips tabaci and t. palmi, is important in the study of vector transmission, insecticide resistance, biological control, etc. morphological identification of these thrips vectors is often a stumbling block in the absence of a specialist and limited by polymorphism, sex, stage of development, etc. molecular identification, on the other hand, is not hampered by the above factors and can e ... | 2007 | 17916265 |
| overwintering locations and hosts for onion thrips (thysanoptera: thripidae) in the onion cropping ecosystem in new york. | identifying locations where onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), overwinter and subsequently disperse is important for designing control strategies. in upstate new york from 2003 through 2006, potential overwintering sites in the commercial onion, allium cepa l., cropping system were investigated early in the spring before onion seedling emergence and again late in the season after onions were harvested. onion thrips adults were sampled directly from the soil and indir ... | 2007 | 17849870 |
| yellow-spot disease of pineapples transmitted by thrips tabaci lind. | | 1931 | 17755304 |
| 4-pyridyl carbonyl and related compounds as thrips lures: effectiveness for onion thrips and new zealand flower thrips in field experiments. | on the basis of structural and/or aroma analogies to known thrips (thysanoptera: thripidae) lures, 35 compounds (18 pyridine derivatives, 13 benzene derivatives, and 4 other compounds), consisting of both synthetic and naturally occurring compounds, were screened for their ability to bring about increased thrips capture in field experiments using water traps in canterbury, new zealand. most of the thrips caught were new zealand flower thrips (nzft) (thrips obscuratus) or onion thrips (ot) (thrip ... | 2007 | 17602496 |
| the susceptibility of onion thrips, thrips tabaci to heterorhabditis indicus. | the potential of the entomopathogenic nematode, heterorhabditis indicus against thrips tabaci was tested on foliage and in soil at three concentrations. soil treatment was more effective than the foliar treatment. at 1.5 million nematodes/m2, nearly 70% mortality was achieved with soil application whereas a similar dose applied to the foliage gave only 55% mortality. soil application gave better mortality of onion thrips (62 %) at 1 million/m2 compared to foliar application at 1.5 million/m2. pr ... | 2006 | 17390799 |
| the occurrence and composition of thrips (thysanoptera) species on leek. | the aim of the present research work was to investigate the population density and species composition of thrips infesting crops of leek in south poland. the flight activity of thrips was monitored using blue sticky traps and plant samples were taken to record the number of adult and larvae of thrips on leek. in 2004, the thrips were caught into blue sticky traps from the middle of june to the end of second decade of october. the first peak flight activity was noticed on the beginning of the thi ... | 2006 | 17385528 |
| patterns of insecticide resistance in onion thrips (thysanoptera: thripidae) in onion fields in new york. | to develop an insecticide resistance management program for onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), on onions (allium spp.), we surveyed populations in commercial onion fields in new york and evaluated their susceptibility to the two most widely used classes of insecticides plus two new insecticides during 2003-2005. all insecticide evaluations were conducted using the thrips insecticide bioassay system (tibs). as in our surveys conducted during 2002-2003, there were larg ... | 2006 | 17066815 |
| population dynamics of banded thrips (aeolothrips intermedius bagnall, thysanoptera, aeolothripidae) and its potential prey thysanoptera species on white clover. | in 2002, the occurrence of banded thrips (aeolothrips intermedius bagnall) and some other thysanoptera species on white clover (trifolium repens l.) was monitored at two locations in the continental part of slovenia. white clover presents in many countries important intercrop in integrated vegetable production. light blue sticky boards were placed on grasslands (one parcel on each location) with high percentage of white clover. sticky boards were changed in about 10-days intervals from the end o ... | 2005 | 16628913 |
| advances in control of onion thrips (thysanoptera: thripidae) in cabbage. | onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), feeding injury results in discoloration and a rough texture on cabbage, brassica oleracea capitata (l.), leaves, and damage may occur deep inside the head. it has become a key pest of cabbage in the united states and many other countries. previous studies have indicated poor control using insecticides. the present study identified imidacloprid drenches and sprays of acetamiprid, dimethoate, spinosad, and imidacloprid as insecticides ... | 2008 | 18459409 |
| impact of straw mulch on populations of onion thrips (thysanoptera: thripidae) in onion. | development of insecticide resistance in onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), populations in onion (allium spp.) fields and the incidence of the t. tabaci transmitted iris yellow spot virus have stimulated interest in evaluating alternative management tactics. effects of straw mulch applied in commercial onion fields in muck areas of western new york were assessed in 2006 and 2007 as a possible onion thrips management strategy. in trials in which no insecticides were a ... | 2008 | 18767742 |
| thrips settling, oviposition and iysv distribution on onion foliage. | thrips tabaci lindeman (thysanoptera: thripidae) adult and larval settling and oviposition on onion (allium cepa l.) foliage were investigated in relation to leaf position and leaf length at prebulb plant growth stages under controlled conditions. in the laboratory, four and six adult females of t. tabaci were released on onion plants at three-leaf stage and six- to eight-leaf stage, respectively, and thrips egg, nymph, and adult count data were collected on each of the three inner most leaves a ... | 2015 | 26470242 |
| within-plant distribution of onion thrips (thysanoptera: thripidae) in onions. | two aspects of the within-plant distribution of thrips tabaci lindeman (thysanoptera: thripidae) on onion, allium cepa l., plants were investigated: 1) diurnal variations in the distribution of adults and larvae between basal and upper sections of onion leaves, and 2) between-leaf and within-leaf distribution of the eggs. the diurnal investigations showed that higher proportions of larvae than of adults congregated at the basal sections of plants, particularly when plants were young and thrips d ... | 2008 | 18767744 |
| binding of tomato spotted wilt virus to a 94-kda thrips protein. | abstract using protein blot assays, a 94-kda thrips protein was identified that exhibited specific binding to tomato spotted wilt virus (tswv) particles. renaturation of the 94-kda protein, which is conserved among the two major vector species of tswv, frankliniella occidentalis and thrips tabaci, was crucial for its virus-binding properties, whereas under the same conditions no specific binding was observed with aphid (myzus persicae) proteins. the 94-kda protein species was present in all deve ... | 1998 | 18945001 |
| first detection of wolbachia in arrhenotokous populations of thrips species (thysanoptera: thripidae and phlaeothripidae) and its role in reproduction. | insects in the order thysanoptera are known for their haplodiploid reproduction, with most species reproducing by arrhenotoky. a few species, however, have only female populations and reproduce by thelytoky. seven thrips species reproducing either by arrhenotoky [frankliniella occidentalis (pergande), echinothrips americanus morgan, suocerathrips linguis mound and marullo, gynaikothrips ficorum (marchal)] or thelytoky [hercinothrips femoralis (o.m. reuter) and parthenothrips dracaenae (heeger)] ... | 2008 | 19161685 |
| attraction of new zealand flower thrips, thrips obscuratus, to cis-jasmone, a volatile identified from japanese honeysuckle flowers. | this work was undertaken to identify floral compound(s) produced by honeysuckle flowers, lonicera japonica (thunberg), that mediate the attraction of new zealand flower thrips thrips obscuratus (crawford). volatiles were collected during the day and night and analyzed by gas chromatography-mass spectrometry (gc-ms) to determine their emission over these two periods. nine compounds were identified in the headspace; the main compound was linalool, and the other compounds were germacrene d, e,e-alp ... | 2009 | 19444522 |
| pyridine compounds increase thrips (thysanoptera: thripidae) trap capture in an onion crop. | the effect of the thrips (thysanoptera: thripidae) lures ethyl isonicotinate, methyl isonicotinate, and ethyl nicotinate on numbers of thrips captured in white water traps in an onion (allium spp.) crop, in new zealand, was examined. female onion thrips, thrips tabaci lindeman (69.0%), and thrips obscuratus crawford (27.8%) (males and females) were the most common species found in traps in the onion crop. ethyl isonicotinate, methyl isonicotinate, and ethyl nicotinate caught 18, 12, and 4x more ... | 2009 | 19736758 |
| identification of three point mutations on the sodium channel gene in pyrethroid-resistant thrips tabaci (thysanoptera: thripidae). | in the onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), the development of resistance to pyrethroid insecticides has become a problem worldwide. to identify this species' resistance mechanism, we analyzed partial nucleotides and deduced the amino acid sequences of the para-orthologous sodium channel gene by using 10 japanese strains of t. tabaci that have a variety of susceptibility levels to pyrethroids. six nucleotide substitutions were found in their cdna sequences. three of th ... | 2009 | 20069860 |
| qtl analysis for resistance to foliar damage caused by thrips tabaci and frankliniella schultzei (thysanoptera: thripidae) feeding in cowpea [vigna unguiculata (l.) walp.]. | three quantitative trait loci (qtl) for resistance to thrips tabaci and frankliniella schultzei were identified using a cowpea recombinant inbred population of 127 f(2:8) lines. an amplified fragment length polymorphism (aflp) genetic linkage map and foliar feeding damage ratings were used to identify genomic regions contributing toward resistance to thrips damage. based on pearson correlation analysis, damage ratings were highly correlated (r >/= 0.7463) across seven field experiments conducted ... | 2010 | 20234834 |
| temporal dynamics of iris yellow spot virus and its vector, thrips tabaci (thysanoptera: thripidae), in seeded and transplanted onion fields. | onion thrips, thrips tabaci (lindeman) (thysanoptera: thripidae), can reduce onion bulb yield and transmit iris yellow spot virus (iysv) (bunyaviridae: tospovirus), which can cause additional yield losses. in new york, onions are planted using seeds and imported transplants. iysv is not seed transmitted, but infected transplants have been found in other u.s. states. transplants are also larger than seeded onions early in the season, and thrips, some of which may be viruliferous, may preferential ... | 2010 | 20388253 |
| onion thrips (thysanoptera: thripidae): a global pest of increasing concern in onion. | during the past two decades, onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), has become a global pest of increasing concern in commercial onion (allium cepa l.), because of its development of resistance to insecticides, ability to transmit plant pathogens, and frequency of producing more generations at high temperatures. t. tabaci feeds directly on leaves, causing blotches and premature senescence as well as distorted and undersized bulbs. t. tabaci can cause yield loss > 50% but ... | 2011 | 21404832 |
| seasonal dynamics of thrips (thrips tabaci) (thysanoptera: thripidae) transmitters of iris yellow spot virus: a serious viral pathogen of onion bulb and seed crops. | thrips-transmitted iris yellow spot virus (iysv) is an important economic constraint to the production of bulb and seed onion crops in the united states and many other parts of the world. because the virus is exclusively spread by thrips, the ability to rapidly detect the virus in thrips vectors would facilitate studies on the role of thrips in virus epidemiology, and thus formulation of better vector management strategies. using a polyclonal antiserum produced against the recombinant, escherich ... | 2014 | 24665687 |
| tospoviruses in the mediterranean area. | tospoviruses are among the most serious threats to vegetable crops in the mediterranean basin. tospovirus introduction, spread, and the diseases these viruses cause have been traced by epidemiological case studies. recent research has centered on the close relationship between tospoviruses and their arthropod vectors (species of the thripidae family). here, we review several specific features of tospovirus-thrips associations in the mediterranean. since the introduction of frankliniella occident ... | 2012 | 22682175 |
| transmission of pantoea ananatis and p. agglomerans, causal agents of center rot of onion (allium cepa), by onion thrips (thrips tabaci) through feces. | frankliniella fusca, the tobacco thrips, has been shown to acquire and transmit pantoea ananatis, one of the causal agents of the center rot of onion. although thrips tabaci, the onion thrips, is a common pest of onions, its role as a vector of p. ananatis has been unknown. the bacterium, p. agglomerans, is also associated with the center rot of onion, but its transmission by thrips has not been previously investigated. in this study, we investigated the relationship of t. tabaci with p. ananati ... | 2014 | 24548212 |
| 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 |
| genetic and host-associated differentiation within thrips tabaci lindeman (thysanoptera: thripidae) and its links to tomato spotted wilt virus-vector competence. | of eight thelytokous populations of onion thrips (thrips tabaci) collected from potato (three populations), onion (four) or chrysanthemum (one) hosts from various regions of australia, only those from potato were capable of transmitting tomato spotted wilt virus (tswv) in controlled transmission experiments. genetic differentiation of seven of these eight populations, and nine others not tested for tswv vector competence, was examined by comparison of the dna sequences of mitochondrial cytochrom ... | 2013 | 23632893 |
| thrips tabaci population genetic structure and polyploidy in relation to competency as a vector of tomato spotted wilt virus. | knowledge of population-level genetic differences can help explain variation among populations of insect vectors in their role in the epidemiology of specific viruses. variation in competency to transmit tomato spotted wilt virus (tswv) that exists among populations of thrips tabaci has been associated with the presence of cryptic species that exhibit different modes of reproduction and host ranges. however, recent findings suggest that vector competency of t. tabaci at any given location depend ... | 2013 | 23365671 |
| specific insect-virus interactions are responsible for variation in competency of different thrips tabaci isolines to transmit different tomato spotted wilt virus isolates. | local adaptation between sympatric host and parasite populations driven by vector genetics appears to be a factor that influences dynamics of disease epidemics and evolution of insect-vectored viruses. although t. tabaci is the primary vector of tomato spotted wilt virus (tswv) in some areas of the world, it is not an important vector of this economically important plant virus in many areas where it occurs. previous studies suggest that genetic variation of thrips populations, virus isolates, or ... | 2013 | 23358707 |
| transmission of iris yellow spot virus by frankliniella fusca and thrips tabaci (thysanoptera: thripidae). | thrips-transmitted iris yellow spot virus (iysv) (family bunyaviridae, genus tospovirus) affects onion production in the united states and worldwide. the presence of iysv in georgia was confirmed in 2003. two important thrips species that transmit tospoviruses, the onion thrips (thrips tabaci (lindeman)) and the tobacco thrips (frankliniella fusca (hinds)) are known to infest onion in georgia. however, t. tabaci is the only confirmed vector of iysv. experiments were conducted to test the vector ... | 2012 | 22420253 |
| two years research on efficiency of two intercrops, birdsfoot trefoil and summer savory, to reduce damage caused by onion thrips(thrips tabaci lindeman, thysanoptera, thripidae) on leek. | in 2009 and 2011, a field experiment was carried out at the laboratory field at the biotechnical faculty in ljubljana, slovenia, with the aim to investigate suitability of two intercrops, birdsfoot trefoil (lotus corniculatus l) and summer savory (satureja hortensis l.), for reducing damage caused by onion thrips (thrips tabaci lindeman) on leek (allium porrum l.). four leek cultivars--'columbus', 'forrest', 'lancelot' and 'lincoln'--were used in the research (bejo zaden b.v., netherlands). in b ... | 2012 | 23885428 |
| impact of abiotic factors on onion thrips (thysanoptera: thripidae) aerial dispersal in an onion ecosystem. | onion thrips, thrips tabaci lindeman, is a significant pest of onion crops worldwide, but little is known about its patterns of aerial dispersal in the context of abiotic environmental factors. thrips tabaci adults were passively collected from the air column above onion fields in western new york using clear sticky cards over a series of sampling periods in 2012, 2013, and 2014 while on-site weather conditions were recorded. results indicated that t. tabaci adult densities on aerial traps durin ... | 2016 | 27477672 |
| evaluating an action threshold-based insecticide program on onion cultivars varying in resistance to onion thrips (thysanoptera: thripidae). | onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), is a highly destructive pest of onion, allium cepa l., and its management relies on multiple applications of foliar insecticides. development of insecticide resistance is common in t. tabaci populations, and new strategies are needed to relax existing levels of insecticide use, but still provide protection against t. tabaci without compromising marketable onion yield. an action threshold-based insecticide program combined with or wi ... | 2016 | 27329626 |
| long-distance dispersal potential for onion thrips (thysanoptera: thripidae) and iris yellow spot virus (bunyaviridae: tospovirus) in an onion ecosystem. | onion thrips, thrips tabaci lindeman, is a worldwide pest of onion whose feeding damage and transmission of iris yellow spot virus (iysv) may reduce onion yields. little is known about the seasonal dynamics of t. tabaci dispersal, the distance of dispersal, or the movement of thrips infected with iysv during the onion-growing season. to address these questions, t. tabaci adults were collected using transparent sticky card traps in commercial onion fields three times during the onion-growing seas ... | 2015 | 26314037 |
| occurrence of iris yellow spot virus from onion crops in egypt. | iris yellow spot virus (iysv) is a infects onion bulb and seed crops in many countries including egypt. results of the mechanical inoculation reveled that, small chlorotic lesions and systemic necrosis were observed on both nicotiana benthamiana and datura stramonium after 10 days, while there were no symptoms were appeared on the onion plant. the viral biological transmission with thrips tabaci was highly reported to be efficiently for virus transmitted. our results confirmed the presentence of ... | 2014 | 25674622 |
| insecticide use in hybrid onion seed production affects pre- and postpollination processes. | research on threats to pollination service in agro-ecosystems has focused primarily on the negative impacts of land use change and agricultural practices such as insecticide use on pollinator populations. insecticide use could also affect the pollination process, through nonlethal impacts on pollinator attraction and postpollination processes such as pollen viability or pollen tube growth. hybrid onion seed (allium cepa l., alliaceae) is an important pollinator-dependent crop that has suffered y ... | 2014 | 24665681 |
| characterization of resistance, evaluation of the attractiveness of plant odors, and effect of leaf color on different onion cultivars to onion thrips (thysanoptera: thripidae). | onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), is a worldwide pest of onion, allium cepa l. in field studies on onion resistance conducted in 2007 and 2008 using 49 cultivars, 11 showed low leaf damage by t. tabaci. in laboratory studies, the 11 cultivars, along with two susceptible checks and four additional cultivars, were evaluated to characterize resistance to t. tabaci and to determine if color and/or light reflectance were associated with resistance to t tabaci. no-choice ... | 2012 | 22606836 |
| iris yellow spot virus (tospovirus: bunyaviridae): from obscurity to research priority. | iris yellow spot virus (iysv) is in the genus tospovirus, family bunyaviridae, with a single-stranded, tri-segmented rna genome with an ambisense genome organization. members of the other genera in the family infect predominantly vertebrates and insects. | 2015 | 25476540 |
| the risk of exotic and native plants as hosts for four pest thrips (thysanoptera: thripinae). | interactions among insect pests, crops and weeds are well recognised. in fact, the elimination of weed hosts outside of the crop is a common practice to control many insect-vectored viruses. however, little is known about interactions among insect pests, crops and native vegetation, and whether native plants may be used to revegetate areas where weed hosts have been eliminated as part of horticultural management regimes. we used the northern adelaide plains horticultural region (south australia, ... | 2010 | 20569517 |
| english field samples of thrips tabaci show strong and ubiquitous resistance to deltamethrin. | onion thrips, thrips tabaci lindeman, is a prevalent pest of glasshouse and field vegetables, such as leeks and salad onions. pesticides are the main option for control, but this approach risks the evolution and spread of insecticide resistance. in the light of anecdotal reports in the united kingdom of poor efficacy of pyrethroids against t. tabaci, thought to be primarily a consequence of resistance, the responses to deltamethrin of ten english samples of t. tabaci, collected from field leeks ... | 2010 | 20603874 |
| impact of insecticide efficacy on developing action thresholds for pest management: a case study of onion thrips (thysanoptera: thripidae) on onion. | an action threshold (at) is one of the most important decision-making elements in integrated pest management. unlike economic thresholds, ats are not typically derived from an economic injury level model, but they are more commonly used. ats may be identified from research-based, pest-crop relationships, but they also may be based on experience. ats may be adjusted depending on, e.g., weather and plant variety, but modifying ats to accommodate differences in insecticide efficacy has received lit ... | 2010 | 20857743 |
| flufenerim, a novel insecticide acting on diverse insect pests: biological mode of action and biochemical aspects. | a new chemical compound was tested for its insecticidal activity against several major insect pests. the compound, called "flufenerim", has a core pyrimidine structure and an unknown mode of action and showed potent activity against the sweet potato whitefly bemisia tabaci (gennadius), the green peach aphid myzus persicae (sulzer), and the african cotton leafworm spodoptera littoralis (boisduval); however, it did not show any activity against two thrips species: western flower thrips frankliniel ... | 2010 | 20958045 |
| receiver operating characteristic curve analysis determines association of individual potato foliage volatiles with onion thrips preference, cultivar and plant age. | tomato spotted wilt virus (tswv) causes sporadic but serious disease in australian potato crops. tswv is naturally spread to potato by thrips of which thrips tabaci is the most important. prior studies indicated possible non-preference of potato cultivars to t. tabaci. select potato cultivars were assessed for non-preference to t. tabaci in paired and group choice trials. cultivars 'bismark', 'tasman' and 'king edward' were less preferred than 'atlantic', 'russet burbank' and 'shepody'. green le ... | 2017 | 28746359 |
| onion thrips (thysanoptera: thripidae) feeding promotes infection by pantoea ananatis in onion. | onion thrips, thrips tabaci lindeman, is a primary insect pest of onions (allium cepa) worldwide. onion thrips cause feeding damage by destroying epidermal tissue. they are also vectors of pantoea ananatis (serrano) mergaert, the bacteria that causes center rot. onions with center rot develop white streaks with water-soaked margins along the onion leaves, which turn necrotic and lead to bulb rot during storage. the role of thrips feeding on the establishment and progression of bacterial infectio ... | 2017 | 29112728 |
| 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 |
| [thysanoptera (insecta)-vicia faba (fabaceae) association in prepuna and puna in jujuy, argentina]. | the different phenological stages of vicia faba provide food resources and substrates for the development of a significant diversity of insects. this study aimed to identify the complex of anthophyllous thrips, analyze the species population fluctuations, to obtain some bioecological aspects and the role they play in this association. the study and sampling was conducted during the flowering-fruiting bean crop stages in two phytogeographical regions of jujuy: prepuna (2 479m asl) on a weekly bas ... | 2012 | 22458213 |
| dna barcode analysis of thrips (thysanoptera) diversity in pakistan reveals cryptic species complexes. | although thrips are globally important crop pests and vectors of viral disease, species identifications are difficult because of their small size and inconspicuous morphological differences. sequence variation in the mitochondrial coi-5' (dna barcode) region has proven effective for the identification of species in many groups of insect pests. we analyzed barcode sequence variation among 471 thrips from various plant hosts in north-central pakistan. the barcode index number (bin) system assigned ... | 2016 | 26741134 |
| effect of temperature on development and reproduction of proprioseiopsis asetus (acari: phytoseiidae) fed on asparagus thrips, thrips tabaci. | thrips tabaci lindeman (thysanoptera: thripidae) is one of the most important pests of asparagus in china. in this study the effects of five constant temperatures (15, 20, 25, 30 and 35 °c) on the growth, survivorship and reproduction of proprioseiopsis asetus (chant) (acari: phytoseiidae) fed on t. tabaci was examined under laboratory conditions. development time of immatures decreased with increasing temperature. the lower egg-to-adult developmental threshold (t 0) and thermal constant (k) of ... | 2014 | 24797293 |
| 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 |
| 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 |
| 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 |
| incidence and characterization of resistance to pyrethroid and organophosphorus insecticides in thrips tabaci (thysanoptera: thripidae) in onion fields in isfahan, iran. | onion thrips, thrips tabaci lindeman, is the main pest of onion-growing fields in isfahan and is mainly controlled by frequently spraying several insecticides. to investigate the resistance status and mechanisms, the susceptibility of ten field populations collected from isfahan onion-growing regions were tested to several currently used pesticides. resistance to the tested insecticides was observed in most populations when compared with the susceptible reference population. enhanced detoxificat ... | 2016 | 27017878 |
| application of the lamp assay as a diagnostic technique for rapid identification of thrips tabaci (thysanoptera: thripidae). | rapid and accurate identification of potentially invasive taxa that may cause high economic losses or environmental damage is of critical importance. the onion thrips, thrips tabaci lindeman, ranks as one of the world's most destructive agricultural pests and commonly found in imported agricultural products and field samples, but is prone to undetected transport because of its minute size as well as cryptic behavior. although traditional taxonomic methods are pretty useful in straightforward ass ... | 2015 | 26470262 |
| female multiple matings and male harassment and their effects on fitness of arrhenotokous thrips tabaci (thysanoptera: thripidae). | although it is generally assumed that one or a few matings are sufficient to maximize female fitness and that mating is generally assumed to be costly to females, multiple matings of females have been reported across a wide and taxonomically diverse set of animals. here, we investigated female mating frequency and male harassment rate in arrhenotokous thrips tabaci. in addition, the cost to females of mating, multiple matings, and male harassment to females was evaluated. we found that t. tabaci ... | 2017 | 26379364 |
| detection of gene flow from sexual to asexual lineages in thrips tabaci (thysanoptera: thripidae). | populations of thrips tabaci are known to have two sympatric but genetically isolated reproductive modes, arrhenotoky (sexual reproduction) and thelytoky (asexual reproduction). herein, we report behavioral, ecological and genetic studies to determine whether there is gene flow between arrhenotokous and thelytokous t. tabaci. we did not detect significant preference by arrhenotokous males to mate with females of a particular reproductive mode, nor did we detect significant behavioral differences ... | 2015 | 26375283 |
| onion thrips (thrips tabaci (thysanoptera: thripidae)) in cabbage on prince edward island: observations on planting date and variety choice. | onion thrips (thrips tabaci lindeman (thysanoptera: thripidae)) can be a pest in organic onion production on prince edward island. this study was to examine the effect of planting time and variety on infestation levels and damage by onion thrips on cabbage (brassicae oleracea capitala (l.)). a field site was planted with 2 main and 8 lesser varieties of cabbage over 4 planting dates. some varieties were short season and harvested on july 31 with longer season varieties harvested on september 2. ... | 2015 | 26306292 |
| high-level of resistance to spinosad, emamectin benzoate and carbosulfan in populations of thrips tabaci collected in israel. | the onion thrips, thrips tabaci lindeman, is a major pest of several crop plants in the genus allium, such as onions, garlic and chives. in israel, these crops are grown in open fields and in protected housing. this thrips is usually controlled by the application of chemical insecticides. in recent years, spinosad, emamectin benzoate and carbosulfan have been the major insecticides used for the control of the onion thrips. in the last 4 years, growers of chives and green onion from several regio ... | 2013 | 22926932 |
| 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 |
| genome size and ploidy of thysanoptera. | flow cytometry was used to study the genome sizes and ploidy levels for four thrips species: franklinothrips orizabensis johansen (thysanoptera: aeolothripidae), frankliniella occidentalis pergande, frankliniella fusca hinds, and thrips tabaci lindeman (thysanoptera: thripidae). f. orizabensis males and females had 1c genome sizes of 426 mb and 422 mb, respectively. male and female f. fusca had 1c genome sizes of 392 mb and 409 mb, whereas f. occidentalis males and females had smaller 1c genomes ... | 2013 | 23121082 |
| effect of the postfeeding interval on olfactory responses of thrips to herbivore-induced cotton plants. | we investigated the responses of 3 thrips species, frankliniella schultzei trybom, f. occidentalis pergrande, and thrips tabaci lindeman (thysanoptera: thripidae) to herbivore-damaged and undamaged cotton seedlings (gossypium hirsutum l. [malvales: malvaceae]) at a range of time intervals following damage by adult tetranychus urticae (koch), adult t. ludeni (zacher) (acari: tetranychidae) or helicoverpa armigera (hübner) (lepidoptera: noctuidae) larvae in olfactometer assays. the intensity/frequ ... | 2016 | 26172119 |
| performance of arrhenotokous and thelytokous thrips tabaci (thysanoptera: thripidae) on onion and cabbage and its implications on evolution and pest management. | onion thrips, thrips tabaci lindeman (thysanoptera: thripidae), is an important pest on onion and cabbage. two reproductive modes--arrhenotoky and thelytoky--are found in this species and co-occur in the field. we compared life table traits between arrhenotokous and thelytokous t. tabaci on cabbage and onion. experiments were conducted in cages to determine which reproductive mode is more competitive. additionally, host adaption of the arrhenotokous and thelytokous t. tabaci between onion and ca ... | 2014 | 25195445 |
| isolation of microsatellite loci from the onion thrips, thrips tabaci. | thrips tabaci lindeman (thysanoptera: thripidae), a cosmopolitan pest insect, is subdivided into at least three genetic lineages that have different biological characters, such as reproductive mode and resistibility to insecticides. since the lineages are discriminated only by mitochondrial dna, there is a possibility of gene flow among lineages at the genomic level. nine polymorphic microsatellite loci were newly isolated from the taxon. moderate to high levels of polymorphism were observed, wi ... | 2013 | 23902377 |
| consequences of co-applying insecticides and fungicides for managing thrips tabaci (thysanoptera: thripidae) on onion. | insecticides and fungicides are commonly co-applied in a tank mix to protect onions from onion thrips, thrips tabaci lindeman, and foliar pathogens. co-applications reduce production costs, but past research shows that an insecticide's performance can be reduced when co-applied with a fungicide. an evaluation was made of the effects of co-applying spinetoram, abamectin and spirotetramat with commonly used fungicides, with and without the addition of a penetrating surfactant, on onion thrips cont ... | 2013 | 23197362 |
| discrimination of reproductive forms of thrips tabaci (thysanoptera: thripidae) by pcr with sequence specific primers. | in agriculture, although it is important to identify species of pest insects, the morphological identification is often difficult. dna genotyping is useful for the identification of species in morphologically indiscriminable species. thrips tabaci (lindeman) can be divided into two reproductive forms (arrhenotoky and thelytoky, each of which different in pesticide resistance) but morphological discrimination is not possible. here, we establish a simple method to discriminate the strains based on ... | 2012 | 22606827 |
| functional response and prey preference of neoseiulus bicaudus (mesostigmata: phytoseiidae) to three important pests in xinjiang, china. | knowledge about the prey preference of polyphagous predators is important for determining their ability to suppress pest insects. tetranychus truncatus (tetranychidae), tetranychus turkestani (tetranychidae), and thrips tabaci (thripidae) often coexist in crops. neoseiulus bicaudus (wainstein) is a native predatory mite that was recently observed in the xinjiang uygur autonomous region of northwest china. the objective of this study was to assess the potential of n. bicaudus as a bio-control age ... | 2017 | 28398551 |
| heteroplasmy due to coexistence of mtcoi haplotypes from different lineages of the thrips tabaci cryptic species group. | heteroplasmy is the existence of multiple mitochondrial dna haplotypes within the cell. although the number of reports of heteroplasmy is increasing for arthropods, the occurrence, number of variants, and origins are not well studied. in this research, the occurrence of heteroplasmy was investigated in thrips tabaci, a putative species complex whose lineages can be distinguished by their mitochondrial dna haplotypes. the results from this study showed that heteroplasmy was due to the occurrence ... | 2017 | 28137324 |