| single-target and multiplex discrimination of whiteflies (hemiptera: aleyrodidae) bemisia tabaci and trialeurodes vaporariorum with modified priming oligonucleotide thermodynamics. | the whitefly species bemisia tabaci (gennadius) and trialeurodes vaporariorum (westwood) are worldwide agricultural pests and virus vectors. bemisia tabaci, in particular, is often transported internationally via trade routes leading to potential introductions of exotic whiteflies or plant viruses. quick identification of agriculturally important whiteflies can facilitate interventions that prevent these cross-border introductions. polymerase chain reaction (pcr) primers were designed to amplify ... | 2017 | 28498951 |
| developing scar markers to study predation on trialeurodes vaporariorum. | dna markers of trialeurodes vaporariorum were developed to detect remains of these whitefly in the gut of the predator dicyphus tamaninii. a 2400-bp dna fragment of t. vaporariorum, absent in other closely related prey species and in the predator banding pattern, was identified by random amplified polymorphic dna (rapd) analysis. after cloning and sequencing this fragment, two pairs of sequence-characterized amplified region (scar) primers were developed, amplifying single bands of 2100 bp and 3 ... | 2000 | 10886409 |
| potential of the predatory mite phytoseius finitimus (acari: phytoseiidae) to feed and reproduce on greenhouse pests. | phytoseiid mites of the genus phytoseius are natural enemies of tetranychid and eriophyid herbivorous mites mostly found on hairy plants where they feed on prey, as well as on pollen. nevertheless, the nutritional ecology and the role of these predators in biological pest control are only rarely addressed. in the present study, we evaluated the potential of phytoseius finitimus to feed and reproduce on three major greenhouse pests, the two-spotted spider mite, the greenhouse whitefly and the wes ... | 2013 | 23771476 |
| effectiveness of imidacloprid (proagro 100 sl) in the control of glasshouse whitefly (trialeurodes vaporariorum) and western flower thrips (frankliniella occidentalis) on tomato under cover. | in 2002 a glasshouse experiments were carried out on the effectiveness of proagro 100 sl in the control of glasshouse whitefly and western flower thrips on tomato cv. perkoz. strict observation of the basic prophylactic rules such as introducing in to glasshouse only healthy seedlings, uninfected by whitefly and thrips as well as isolation of tomato plants, especially the seedlings from ornamental plants are important to the limit of the pest population. during the vegetation period the populati ... | 2004 | 15759404 |
| intraguild predation of geocoris punctipes on eretmocerus eremicus and its influence on the control of the whitefly trialeurodes vaporariorum. | geocoris punctipes (hemiptera: lygaeidae) and eretmocerus eremicus (hymenoptera: aphelinidae) are whitefly natural enemies. previously, under laboratory conditions, we showed that g. punctipes engages in intraguild predation (igp), the attack of one natural enemy by another, on e. eremicus. however, it is unknown whether this igp interaction takes place under more complex scenarios, such as semi-field conditions. even more importantly, the effect of this interaction on the density of the prey po ... | 2016 | 26435031 |
| intraguild predation on the whitefly parasitoid eretmocerus eremicus by the generalist predator geocoris punctipes: a behavioral approach. | intraguild predation (igp) takes place when natural enemies that use similar resources attack each other. the impact of igp on biological control can be significant if the survival of natural enemy species is disrupted. in the present study, we assessed whether geocoris punctipes (hemiptera: lygaeidae) engages in igp on eretmocerus eremicus (hymenoptera: aphelinidae) while developing on whitefly nymphs of trialeurodes vaporariorum (hemiptera: aleyrodidae). in choice and non-choice tests, we expo ... | 2013 | 24260452 |
| beyond predation: the zoophytophagous predator macrolophus pygmaeus induces tomato resistance against spider mites. | many predatory insects that prey on herbivores also feed on the plant, but it is unknown whether plants affect the performance of herbivores by responding to this phytophagy with defence induction. we investigate whether the prior presence of the omnivorous predator macrolophus pygmaeus (rambur) on tomato plants affects plant resistance against two different herbivore species. besides plant-mediated effects of m. pygmaeus on herbivore performance, we examined whether a plant defence trait that i ... | 2015 | 25974207 |
| insecticidal activity of protein extracts obtained from bulbs of chilean amaryllidaceae against trialeurodes vaporariorum westwood and pseudococcus viburni signoret. | entomotoxic proteins are produced by plants in defence against insect herbivory. some carbohydrate-binding proteins exhibit strong insecticidal activity affecting the survival, growth, development and feeding behavior of phytophagous insects. the occurrence of entomotoxic lectins is well documented in the amaryllidaceae, a plant family spread world-wide. in chile, this family is represented by numerous species, many of which are also of high ornamental value. protein extracts were obtained from ... | 2015 | 27145586 |
| vector transmission alone fails to explain the potato yellow vein virus epidemic among potato crops in colombia. | the potato yellow vein disease, caused by the potato yellow vein virus (pyvv), is a limiting potato disease in northern south america. the virus can be transmitted either by the greenhouse whitefly (gwf), trialeurodes vaporariorum (westwood) (hemiptera: aleyrodidae), or through vegetative propagules, such as infected tubers. recently, gwf populations have been spotlighted as one of the main drivers of pyvv re-emergence, and consequently, pyvv management has been predominantly directed toward vec ... | 2017 | 28993785 |
| global phylogenetic relationships, population structure and gene flow estimation of trialeurodes vaporariorum (greenhouse whitefly). | trialeurodes vaporariorum (westwood, 1856) (greenhouse whitefly) is an agricultural pest of global importance. it is associated with damage to plants during feeding and subsequent virus transmission. yet, global phylogenetic relationships, population structure, and estimation of the rates of gene flow within this whitefly species remain largely unexplored. in this study, we obtained and filtered 227 genbank records of mitochondrial cytochrome c oxidase i (mtcoi) sequences of t. vaporariorum, acr ... | 2018 | 28532532 |
| insight into the success of whitefly biological control using parasitoids: evidence from the eretmocerus warrae-trialeurodes vaporariorum system. | mechanisms behind the success and failure of whitefly biological control using parasitoids are largely unknown. here we use the eretmocerus warrae-greenhouse whitefly system to investigate how the fluctuating density of the parasitoid and its host affects three key parasitoid fitness parameters, host searching, host feeding and parasitization, providing critical knowledge for evaluation and development of whitefly biological control programmes. this is the first such study in a parasitoid-whitef ... | 2017 | 28493468 |
| nitrogen in hydroponic growing medium of tomato affects the demographic parameters of trialeurodes vaporariorum (westwood) (hemiptera: aleyrodidae). | we evaluated the effects of different nitrogen levels (380, 310, 240, and 174 ppm) on the life history parameters of trialeurodes vaporariorum (westwood) (hemiptera: aleyrodidae) on hydroponically cultured tomato plants. our data show that there is a positive correlation between the nitrogen content and the demographic parameters, as the intrinsic rate of increase of t. vaporariorum was the lowest (0.059 ± 0.007 day(-1)) at 174 ppm and the highest (0.088 ± 0.005 day(-1)) at 380 ppm of nitrogen. ... | 2015 | 26385237 |
| agroecosystems shape population genetic structure of the greenhouse whitefly in northern and southern europe. | to predict further invasions of pests it is important to understand what factors contribute to the genetic structure of their populations. cosmopolitan pest species are ideal for studying how different agroecosystems affect population genetic structure within a species at different climatic extremes. we undertook the first population genetic study of the greenhouse whitefly (trialeurodes vaporariorum), a cosmopolitan invasive herbivore, and examined the genetic structure of this species in north ... | 2014 | 25266268 |
| population structure of the greenhouse whitefly, trialeurodes vaporariorum (westwood), an invasive species from the americas, 60 years after invading china. | though the greenhouse whitefly, trialeurodes vaporariorum (westwood) (hemiptera: aleyrodidae) was introduced into china more than 60 years ago, the genetic diversity and structure of this exotic insect pest and virus vector have not been studied. to investigate the population genetic characteristics of this invasive species and to identify potential invasion routes, the genetic diversity and population structure of 17 collections of t. vaporariorum from nine provinces in china were analyzed usin ... | 2014 | 25093716 |
| variation in mortality among populations is higher for pymetrozine than for imidacloprid and spiromesifen in trialeurodes vaporariorum in greenhouses in finland. | insecticide resistance in trialeurodes vaporariorum w. is unknown in the species' northern distribution range where it inhabits mainly commercial greenhouses. resistance development in whiteflies feeding on year-round crops in greenhouses is possible owing to the use of chemical treatments to back up biocontrol. the authors tested the response levels to spiromesifen, pymetrozine and imidacloprid in whiteflies collected from seven greenhouses within a 35 km radius in western finland. | 2014 | 24757031 |
| genetic variation of the greenhouse whitefly, trialeurodes vaporariorum (hemiptera: aleyrodidae), among populations from serbia and neighbouring countries, as inferred from coi sequence variability. | the greenhouse whitefly trialeurodes vaporariorum westwood, 1856 (hemiptera: aleyrodidae) is an invasive and highly polyphagous phloem-feeding pest of vegetables and ornamentals. trialeurodes vaporariorum causes serious damage due to direct feeding and transmits several important plant viruses. excessive use of insecticides has resulted in significantly reduced levels of susceptibility of various t. vaporariorum populations. to determine the genetic variability within and among populations of t. ... | 2014 | 24661625 |
| resistance to spiromesifen in trialeurodes vaporariorum is associated with a single amino acid replacement in its target enzyme acetyl-coenzyme a carboxylase. | spiromesifen is a novel insecticide and is classed as a tetronic acid derivative. it targets the insects' acetyl-coenzyme a carboxylase (accase) enzyme, causing a reduction in lipid biosynthesis. at the time of this publication, there are no reports of resistance to this class of insecticides in insects although resistance has been observed in several mite species. the greenhouse whitefly trialeurodes vaporariorum (westwood) is a serious pest of protected vegetable and ornamental crops in temper ... | 2012 | 22458881 |
| mutations in the sodium channel associated with pyrethroid resistance in the greenhouse whitefly, trialeurodes vaporariorum. | trialeurodes vaporariorum westwood is an important pest of protected crops in temperate regions of the world. resistance to pyrethroid insecticides is long established in this species, but the molecular basis of the mechanism(s) responsible has not previously been disclosed. | 2012 | 22228578 |
| diodia vein chlorosis virus is a group-1 crinivirus. | members of the family closteroviridae have emerged as a major problem in agricultural crops in the past two decades. diodia vein chlorosis virus (dvcv) is an understudied whitefly-transmitted closterovirus. given the presence of the primary host for the virus in major agricultural production areas in the united states, we characterized the virus at the molecular level, demonstrating that it belongs in the genus crinivirus, developed detection protocols, evaluated its host range among hosts known ... | 2011 | 21735210 |
| population dynamics and the economics of invasive species management: the greenhouse whitefly in california-grown strawberries. | in agriculture, relatively few efficacious control measures may be available for an invasive pest. in the case of a new insect pest, insecticide use decisions are affected by regulations associated with its registration, insect population dynamics, and seasonal market price cycles. we assess the costs and benefits of environmental regulations designed to regulate insecticide applications on an invasive species. we construct a bioeconomic model, based on detailed scientific data, of management de ... | 2009 | 18207306 |
| current status of the greenhouse whitefly, trialeurodes vaporariorum, susceptibility to neonicotinoid and conventional insecticides on strawberries in southern california. | since 1998, the greenhouse whitefly, trialeurodes vaporariorum westwood (homoptera: aleyrodidae), has emerged as a major insect pest of many horticultural crops in coastal california. control of this pest has been heavily dependent upon chemical insecticides. objectives of this study were to determine the status of the greenhouse whitefly susceptibility to neonicotinoid and conventional insecticides on strawberries in oxnard/ventura, a year-round intensive horticultural production area of southe ... | 2007 | 17591729 |
| greenhouse whitefly (homoptera: aleyrodidae) dispersal under different uv-light environments. | the greenhouse whitefly, trialeurodes vaporariorum (westwood) (homoptera: aleyrodidae), is known to respond to uv light (uv). field studies were conducted to improve our understanding of the behavioral effects and practical implications of using uv-blocking plastic films for the control of whitefly. adult whiteflies were released in outdoor-located choice-chamber experiments with compartments clad with a range of films that transmitted incident uv to different extents. in release-recapture exper ... | 2007 | 17461063 |
| report of resistance to the neonicotinoid insecticide imidacloprid in trialeurodes vaporariorum (hemiptera: aleyrodidae). | susceptibilities of uk and mainland european samples of trialeurodes vaporariorum (westwood) to the neonicotinoid insecticide imidacloprid were investigated over a 7 year period. all 24 strains collected between 1997 and 2003 showed similar baseline levels of susceptibility to that of a known susceptible laboratory strain when exposed to a diagnostic concentration (128 mg l(-1)) of formulated imidacloprid. two samples collected during 2004, one from the uk and one from the netherlands, demonstra ... | 2007 | 17437257 |
| effects of uv-absorbing plastic films on greenhouse whitefly (homoptera: aleyrodidae). | studies were conducted to investigate the effects of ultraviolet (uv)-absorbing plastic films on the orientation and distribution behavior of the greenhouse whitefly, trialeurodes vaporariorum (westwood). in field experiments, small tunnels were constructed and covered with either an uv-transmitting (thermilux) or uv-absorbing (k-rose) plastic film. results show that significantly more whiteflies were recorded in the tunnels with high compared with those with low uv intensities. moreover, whitef ... | 2005 | 16156574 |
| timing and ecdysteroid regulation of the molt in last instar greenhouse whiteflies (trialeurodes vaporariorum). | a system of markers has been devised to track the development of 3rd and 4th instar/pharate adult greenhouse whiteflies. instars were identified based on measurements of body width and body length. depending upon the host plant, the product of the two measurements was exceptionally useful in distinguishing between instars. body depth was used to divide the 3rd instar into eight stages and body depth and color and appearance of the developing adult eye were used to divide the 4th instar/pharate a ... | 2002 | 12770133 |
| effectiveness of juventox 040 sl in the control of glasshouse whitefly (trialeurodes vaporariorum) on tomato cv. gracja. | in 1999 a glasshouse experiment was carried out on the effectiveness of juventox 040 sl at the concentration 0.05% in the control of glasshouse whitefly on tomato. the standard treatment was pyriproxyfen. in order to determine the efficiency of the insecticides the dynamics of whitefly development was determined for each treatment and in the control on 10 plants, on 3 leafs per plant. juventox 040sl performed well in limiting of glasshouse whitefly and keep pest population on low level for many ... | 2002 | 12696430 |
| seasonal population dynamics of the greenhouse whitefly trialeurodes vaporariorum (homoptera: aleyrodidae) on strawberries in southern california. | the greenhouse whitefly, trialeurodes vaporariorum (westwood), has recently become a major insect pest of strawberries in southern california. the population dynamics of this pest were monitored over 2 yr in six commercial strawberry fields near the coastal communities of oxnard and ventura under two crop-production regimes, summer- and fall-planted strawberries. adult whitefly numbers generally peaked during the february through may period for fall-planted strawberries and during the october th ... | 2002 | 12539829 |
| field trials measuring the effects of ultraviolet-absorbing greenhouse plastic films on insect populations. | field studies were conducted to compare insect population levels in greenhouse crops covered with plastics that block the transmission of uv light in two wavelength ranges. crops grown in greenhouses under a plastic that blocked uv light at wavelengths of 380 nm and below had lower numbers of aphids and thrips compared with a plastic that blocked uv light at wavelengths of 360 nm and below. this is consistent with the results found for thrips in previous studies using small, completely enclosed ... | 2002 | 11942745 |
| effects of buprofezin on the ultrastructure of the third instar cuticle of the insect trialeurodes vaporariorum. | treatment with buprofezin at the beginning of the third instar of trialeurodes vaporariorum results in death of the larvae at the time of moulting. electron microscopic observations, after treatment of the larvae with 20 mg a.i./l buprofezin, does not reveal any difference in the ultrastructural profile before apolysis, however formation of a normal lamellate procuticle is disturbed. the pharate procuticle is amorphous, varying in thickness and the mean thickness is greatly reduced. the subcutic ... | 1991 | 18621186 |
| 100 hz remains upper limit of synchronous muscle contraction--an anomaly resolved. | wootton and newman introduced a problem when they showed, by high-speed cinematography, that a minute hemipteran insect, the whitefly trialeurodes vaporariorum, achieves a wing-beat frequency of up to 181 hz. 100 hz had been regarded as the upper limit of contraction by myoneural synchrony, and whitefly flight muscle had been placed in the 'synchronous' category on structural grounds. the problem is resolved by evidence presented here, which reclassifies the power-producing flight muscles of whi ... | 2003 | 6855898 |
| effect of the greenhouse whitefly on yields of greenhouse tomatoes. | | 1972 | 5085805 |
| production of female offspring by virgin females in the greenhouse whitefly, trialeurodes vaporariorum, under the influence of high temperatures. | | 2010 | 21000102 |