Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| lettuce mosaic virus: from pathogen diversity to host interactors. | taxonomy: lettuce mosaic virus (lmv) belongs to the genus potyvirus (type species potato virus y) in the family potyviridae. physical properties: the virion is filamentous, flexuous with a length of 750 nm and a width of 15 nm. the particles are made of a genomic rna of 10 080 nucleotides, covalently linked to a viral-encoded protein (the vpg) at the 5' end and with a 3' poly a tail, and encapsidated in a single type of capsid protein. the molecular weight of the capsid protein subunit has been ... | 2008 | 18705846 |
| in silico analyses of peptide paracrines/hormones in aphidoidea. | the aphidoidea is an insect superfamily comprising most of the known aphid species. while small in size, these animals are of considerable economic importance as many members of this taxon are serious agricultural pests, inflicting physical damage upon crop plants and serving as vectors in the transmission of viral plant diseases. in terms of identifying the paracrines/hormones used to modulate behavior, particularly peptides, members of the aphidoidea have largely been ignored, as it is not tra ... | 2008 | 18725225 |
| genetic covariation between effectiveness and cost of defence in aphids. | ecological immunology distinguishes between the long-term evolutionary costs of possessing defences against parasites and the short-term costs of using them. evolutionary biologists have typically focused on the former in the search for constraints on the evolution of resistance. here, we show in the peach-potato aphid, myzus persicae, that short-term costs may be of equal evolutionary importance. survivors of more resistant aphid clones suffered a higher reduction of fecundity upon parasitoid a ... | 2008 | 18765353 |
| evaluation of artificial diets for rearing aphis glycines (hemiptera: aphididae). | artificial aphid diets have been previously developed for the pea aphid, acyrthosiphon pisum (harris), and the green peach aphid, myzus persicae (sulzer). the ability to rear aphids on an artificial diet allows for selectively adding or subtracting compounds from an aphid's food source to determine the effect on fecundity and longevity. five diets previously developed for the green peach aphid and the pea aphid were tested for their suitability for rearing soybean aphid, aphis glycines matsumura ... | 2008 | 18767731 |
| oxydemeton-methyl resistance, mechanisms, and associated fitness cost in green peach aphids (hemiptera: aphididae). | susceptibility to oxydemeton-methyl and imidacloprid, and the inhibitory effects of oxydemeton-methyl and some organophosphate compounds on acetylcholinesterase (ache) and carboxylesterase activity were studied in two populations (karaj and rasht) of green peach aphids, myzus persicae (sulzer). results show that the karaj population was resistant to oxydemeton-methyl but susceptible to imidacloprid. the esterase activity of the resistant and susceptible populations suggests that one of the resis ... | 2008 | 18767757 |
| correlated responses to neonicotinoid insecticides in clones of the peach-potato aphid, myzus persicae (hemiptera: aphididae). | although there are still no confirmed reports of strong resistance to neonicotinoid insecticides in aphids, the peach-potato aphid (myzus persicae sulzer) shows variation in response, with some clones exhibiting up to tenfold resistance to imidacloprid. five clones varying in response to imidacloprid were tested with four other neonicotinoid molecules to investigate the extent of cross-resistance. | 2008 | 18803174 |
| [influence of different drying temperatures for solid substrate after fermentation on conidia characteristics of the entomopathogenic fungus beauveria bassiana]. | this study was to evaluate the effect of drying temperature for solid substrate after fermentation on conidia characteristics of entomopathogenic fungus beauveria bassiana. | 2008 | 18837365 |
| parathion for control of green peach aphid on shade-grown tobacco. | 1947 | 18935286 | |
| testing competing measures of profitability for mobile resources. | optimal diet theory often fails to predict a forager's diet choice when prey are mobile. because they escape or defend themselves, mobile prey are likely to increase the forager's handling time, thereby decreasing its fitness gain rate. many animals have been shown to select their prey so as to maximize either their fitness gain or their fitness gain rate. however, no study has yet compared directly these two measures of profitability by generating testable predictions about the choice of the fo ... | 2009 | 18941790 |
| identification, characterization, and detection of black raspberry necrosis virus. | abstract a serious disease was observed in black raspberry (rubus occidentalis) in oregon in the last decade. plants showing mosaic symptoms declined rapidly and, in many cases, died after several years. double-stranded rna extraction from symptomatic black raspberry revealed the presence of two high molecular weight bands which were cloned and sequenced. sequence analysis disclosed the presence of a novel virus that was tentatively named black raspberry decline-associated virus (brdav). the com ... | 2007 | 18942935 |
| plum pox in north america: identification of aphid vectors and a potential role for fruit in virus spread. | abstract thirteen aphid species were tested for their ability to transmit pennsylvania isolates of plum pox virus (ppv) collected in columbia (penn-3), franklin (penn-4), and york (penn-7) counties, pa. four species, aphis fabae, a. spiraecola, brachycaudus persicae, and myzus persicae, consistently transmitted ppv in preliminary transmission tests. two species, metopolophium dirhodum and rhopalosiphum padi, were occasional inefficient vectors. toxoptera citricida, from florida, also was an effe ... | 2004 | 18943108 |
| characterization of four viral species belonging to the family potyviridae isolated from ranunculus asiaticus. | abstract four different viral species were isolated from diseased ranunculus asiaticus plants growing in imperia province (italian riviera-liguria region). infected plants exhibited mosaic symptoms and growth abnormalities. the viruses were mechanically inoculated to a range of herbaceous hosts and differentiated biologically. long flexuous particles were present in leaf dip extracts observed by electron microscopy. a general protocol for the amplification of potyvirus genome fragments through r ... | 2006 | 18943173 |
| transmission efficiency of papaya ringspot virus by three aphid species. | the transmission efficiency of papaya ringspot virus (prsv) by three aphid vectors (i.e., aphis gossypii, a. craccivora, and myzus persicae) was studied. efficiency was measured by single-aphid inoculation, group inoculation (using five aphids), duration of virus retention, and the number of plants following a single acquisition access period (aap) to which the aphids could successfully transmit the virus. single-aphid inoculation studies indicated that m. persicae (56%) and a. gossypii (53%) we ... | 2008 | 18943221 |
| host range and characterization of sunflower mosaic virus. | abstract sunflower mosaic is caused by a putative member of the family potyviridae. sunflower mosaic virus (sumv) was characterized in terms of host range, physical and biological characteristics, and partial nucleotide and amino acid sequence. cells infected with sumv had cytoplasmic inclusion bodies typical of potyviruses. of 74 genera tested, only species in helianthus, sanvitalia, and zinnia, all asteraceae, were systemic hosts. commercial sunflower hybrids from the united states, europe, an ... | 2002 | 18943264 |
| transmission efficiency of cucumber mosaic virus by aphids associated with virus epidemics in snap bean. | cucumber mosaic virus (cmv) is a major component of the virus complex that has become more pronounced in snap bean in the midwestern and northeastern united states since 2001. multiple-vector-transfer tests were done to estimate the cmv transmission efficiencies (p) of the main aphid species identified in commercial snap bean fields in new york and pennsylvania. the four most efficient vectors (p > 0.05) were aphis gossypii, a. glycines, acyrthosiphon pisum, and therioaphis trifolii, which were ... | 2008 | 18943413 |
| hairy nightshade as a potential potato leafroll virus (luteoviridae: polerovirus) inoculum source in pacific northwest potato ecosystems. | hairy nightshade, solanum sarrachoides, is a solanaceous weed found abundantly in pacific northwest potato ecosystems. it serves as a reservoir for one of the important potato viruses, potato leafroll virus (plrv) (luteoviridae: polerovirus), and its most important vector, the green peach aphid, myzus persicae (homoptera: aphididae). laboratory research indicated an increased green peach aphid settling and performance on s. sarrachoides than on potato. it also revealed that green peach aphids tr ... | 2008 | 18943736 |
| identification and characterization of a novel whitefly-transmitted member of the family potyviridae isolated from cucurbits in florida. | abstract a novel whitefly-transmitted member of the family potyviridae was isolated from a squash plant (cucurbita pepo) with vein yellowing symptoms in florida. the virus, for which the name squash vein yellowing virus (sqvyv) is proposed, has flexuous rod-shaped particles of approximately 840 nm in length. the experimental host range was limited to species in the family cucurbitaceae, with the most dramatic symptoms observed in squash and watermelon, but excluded all tested species in the fami ... | 2007 | 18944369 |
| aphid acquisition and cellular transport of potato leafroll virus-like particles lacking p5 readthrough protein. | abstract lepidopteran cells (spodoptera frugiperda) produced isometric virus-like particles (vlp) when infected with a recombinant baculovirus ac61 that contained the potato leafroll virus (plrv) coat protein gene modified with an n-terminal histidine tag (p3-6h). cells infected with acfl, a recombinant baculovirus that expressed cdna copies of the plrv genome rna, did not produce virus-like particles (vlp). in cell lines doubly infected with ac61 and acfl, vlp were formed that contained plrv-rn ... | 2000 | 18944480 |
| 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 |
| characteristics of beet yellows closterovirus transmission to sugar beets by aphis fabae. | abstract laboratory studies were conducted on the characteristics of beet yellows closterovirus (byv) transmission to sugar beets by the bean aphid, aphis fabae. the relative transmission efficiency and the retention, acquisition, and inoculation thresholds were evaluated using clonal aphid colonies. transmission efficiency was studied between different apterous aphid species (a. fabae and myzus persicae ), between alate and apterous morphs of a. fabae and m. persicae, and among five clonal aphi ... | 1997 | 18945100 |
| synthesis and insecticidal activity of n-substituted (1,3-thiazole)alkyl sulfoximine derivatives. | the n-substituted alkyl sulfoximine derivatives are a new chemical family of neonicotinoid insecticides. we have designed and synthesized 10 (1,3-thiazole)alkyl sulfoximine derivatives. all compounds were identified by (1)h and (13)c nuclear magnetic resonance (nmr), ir, and elemental analyses. preliminary bioassays indicated that some title compounds exhibited good insecticidal activities at 10 mg/l against myzus persicae . the relationship between structure and biological activity was also dis ... | 2008 | 19007296 |
| pathogenic fungi and parasitoids of aphids present in air captures of migratory alates in the low-latitude plateau of yunnan, china. | to survey fungal pathogens and parasitoids of aphids in the low-latitude plateau of yunnan, southwest china, 3,553 migratory alates of brevicoryne brassicae, lipaphis erysimi, and myzus persicae were attracted to a yellow-plus-plant trap from air during a full-year period and individually reared on cabbage leaves for 7-14 d at 18-22 degrees c and l:d 12:12. among the trapped alates, 19.2% were killed by 10 species of aphid-pathogenic fungi after survival of 2.3 d (range, 1-7 d). another 2.8% wer ... | 2008 | 19036206 |
| testing nicotine tolerance in aphids using an artificial diet experiment. | plants may upregulate the production of many different seconday metabolites in response to insect feeding. one of these metabolites, nicotine, is well know to have insecticidal properties. one response of tobacco plants to herbivory, or being gnawed upon by insects, is to increase the production of this neurotoxic alkaloid. here, we will demonstrate how to set up an experiment to address this question of whether a tobacco-adapted strain of the green peach aphid, myzus persicae, can tolerate high ... | 2008 | 19066588 |
| testing the physiological barriers to viral transmission in aphids using microinjection. | potato loafroll virus (plrv), from the family luteoviridae infects solanaceous plants. it is transmitted by aphids, primarily, the green peach aphid. when an uninfected aphid feeds on an infected plant it contracts the virus through the plant phloem. once ingested, the virus must pass from the insect gut to the hemolymph (the insect blood ) and then must pass through the salivary gland, in order to be transmitted back to a new plant. an aphid may take up different viruses when munching on a plan ... | 2008 | 19066589 |
| green peach aphid, myzus persicae (hemiptera: aphididae), reproduction during exposure to sublethal concentrations of imidacloprid and azadirachtin. | resurgence of insect pests following insecticide applications is often attributed to natural enemy disturbance, but hormesis could be an alternative or additional mechanism. green peach aphid, myzus persicae (sulzer), is an important insect pest of many crops worldwide that may be exposed to sublethal insecticide concentrations over time. here, the hypothesis that exposure to low concentrations of imidacloprid and azadirachtin can induce hormetic responses in m. persicae is tested in the laborat ... | 2009 | 19089851 |
| laboratory and field evaluations of entomopathogenic lecanicillium attenuatum cnu-23 for control of green peach aphid (myzus persicae). | an entomopathogenic fungus was isolated from an infected aphid. the isolate conformed most closely to lecanicillium attenuatum cbs 402.78 (aj292434) based on the internal transcribed spacer (its) region of its 18s rdna, and thus was designated l. attenuatum cnu-23. laboratory and field evaluations of cnu-23 blastospores were carried out for the control of green peach aphids. the laboratory evaluations of cnu-23 revealed an aphid mortality of about 80% with an estimated lt50 of 3.72 days after th ... | 2008 | 19131693 |
| survey for resistance to four insecticides in myzus persicae clones from peach trees and weeds in south-central washington. | the insecticides esfenvalerate, endosulfan, imidacloprid, and methamidophos were screened against 74 clonal populations of the green peach aphid, myzus persicae (sulzer), collected as fundatrices from peach (prunus spp.) and as apterous virginoparae from various weeds near potato (solanum spp.) fields in the yakima valley and columbia basin regions of washington state. response to diagnostic concentration of four insecticide products demonstrated a bimodal pattern of survival to endosulfan (phas ... | 2008 | 19133475 |
| attacks by a piercing-sucking insect (myzus persicae sultzer) or a chewing insect (leptinotarsa decemlineata say) on potato plants (solanum tuberosum l.) induce differential changes in volatile compound release and oxylipin synthesis. | plant defensive strategies bring into play blends of compounds dependent on the type of attacker and coming from different synthesis pathways. interest in the field is mainly focused on volatile organic compounds (vocs) and jasmonic acid (ja). by contrast, little is known about the oxidized polyunsaturated fatty acids (pufas), such as pufa-hydroperoxides, pufa-hydroxides, or pufa-ketones. pufa-hydroperoxides and their derivatives might be involved in stress response and show antimicrobial activi ... | 2009 | 19221142 |
| what makes episyrphus balteatus (diptera: syrphidae) oviposit on aphid infested tomato plants? | under attack by insect pests, many plant species change their volatile chemical emissions to attract natural enemies. most of the tomato (lycopersicon sp., solanaceae) varieties are subjected to infestation by molluscs and insects, including the generalist aphid myzus persicae sulzer (homoptera, aphididae). episyrphus balteatus de geer (diptera: syrphidae) is a generalist aphid predator that was here observed to lay eggs on m. persicae infested tomato but not on non-infested plants. in order to ... | 2008 | 19226776 |
| investigation of carbohydrate binding property of a fungal lectin from xerocomus chrysenteron and potential use on myzus persicae aphid. | in recent years encoding insecticidal lectins have been suggested as one of the promising methods against insect pests and have been engineered successfully into a variety of crops including wheat, rice, tobacco and potatoes. xerocomus chrysenteron lectin (xcl) has a high hemagglutinating activity and results obtained from sugar specificity assay showed to have specific affinity to galactose and n-acetylgalactosamine (galnac). in previous studies, xcl was shown to have negative effects on some i ... | 2008 | 19226804 |
| bioactive furanoeremophilanes from senecio otites kunze ex dc. | the furanoeremophilanes 6 beta-angeloyloxy-1,10-dehydrofuranoeremophilan-9-one (1), 6 beta-hydroxy-1,10-dehydrofuranoeremophilan-9-one (2) and 6 beta-propionyloxy-1,10-dehydrofuranoeremophilan-9-one (3) were isolated from senecio otites, their structures elucidated by spectral analyses, and their insecticidal and phytotoxic properties evaluated. compounds 1-3 proved to be effective aphid antifeedants against myzus persicae and rhopalosiphum padi and had postingestive negative effects on spodopte ... | 2009 | 19227831 |
| integrating chemical and biological control of european corn borer in bell pepper. | using multiple locations and a series of field trials over 2 yr, we evaluated an integrated pest management program for ostrinia nubilalis (hübner) (lepidoptera: crambidae) management in peppers involving biorational chemistries, inundative releases of trichogramma ostriniae (pang & chen), and conservation of generalist predators. in small plot trials, three biorational insecticides (spinosad, indoxacarb, and methoxyfenozide) provided comparable control of o. nubilalis as two broad-spectrum conv ... | 2009 | 19253647 |
| intraspecific variation of myzus persicae on sugar beet (beta vulgaris). | differences in inherited resistance among seven sugar-beet stocks had similar effects on myzus persicae clones representing the range of variation in aphid response to resistant and susceptible sugar beet observed in fifty-eight clones collected between 1969 and 1971. three sugar-beet stocks were consistently resistant. statistically significant interactions between beet stocks and aphid clones did not indicate the existence of biotypes with specific abilities to overcome resistance. m. persicae ... | 1974 | 19280785 |
| sugar, organic acid, phenolic acid and plant growth regulator content of extracts of honeydew of the aphid myzus persicae and of its host plant, raphanus sativus. | the honeydew of myzus persicae feeding on radish seedlings contains glucose, fructose, trehalose, melezitose and sucrose, of which glucose and fructose are present in radish seedlings. in addition, the honeydew contains eight organic acids, of which seven are present in uninfested seedlings and six are present in infested radish seedlings: of the eighteen phenolic acids in the honeydew, five are present in uninfested radish seedlings. auxins, gibberellins, growth inhibitors and cytokinins are pr ... | 1974 | 19280790 |
| the gene controlling the indole glucosinolate modifier1 quantitative trait locus alters indole glucosinolate structures and aphid resistance in arabidopsis. | glucosinolates are defensive secondary compounds that display large structural diversity in arabidopsis thaliana and related plants. much attention has been paid to variation in the biosynthesis of met-derived aliphatic glucosinolates and its ecological consequences, but little is known about the genes that cause qualitative and quantitative differences in trp-derived indole glucosinolates. we use a combination of quantitative trait locus (qtl) fine-mapping and microarray-based transcript profil ... | 2009 | 19293369 |
| partitioning yield loss on yellow squash into nematode and insect components. | the effect of a contplex of several insect and nematode pests on yield of yellow squash (cucurbita pepo l.) was examined in two field tests in southern florida. applications of permethrin for insect control and oxamyl primarily for nematode control plus some insect control were made alone and in combination to achieve differential reduction of various insect and nematode components contributing to yield loss. the effect of these components on yield was further analyzed by multiple regression. yi ... | 1982 | 19295683 |
| a comparison of alternative plant mixes for conservation bio-control by native beneficial arthropods in vegetable cropping systems in queensland australia. | cucurbit crops host a range of serious sap-sucking insect pests, including silverleaf whitefly (slw) and aphids, which potentially represent considerable risk to the australian horticulture industry. these pests are extremely polyphagous with a wide host range. chemical control is made difficult due to resistance and pollution, and other side-effects are associated with insecticide use. consequently, there is much interest in maximising the role of biological control in the management of these s ... | 2010 | 19323854 |
| spatial and temporal expression patterns of diverse pin-ii proteinase inhibitor genes in capsicum annuum linn. | pin-ii type proteinase inhibitor (pi) genes were cloned from fruit and stem tissues of capsicum annuum l. var phule jyoti using primers designed from reported canpi gene sequence (af039398). in total, 21 novel canpis, members of the pin-ii pi family, were identified in the study, with three isoforms of 1-inhibitory repeat domain (ird), eight isoforms of 2-ird, three isoforms of 3-ird, five isoforms of 4-ird and two partial canpi sequences. most of the sequences showed variation (2 to 20%) in the ... | 2009 | 19393726 |
| a simple, rapid and inexpensive method for localization of tomato yellow leaf curl virus and potato leafroll virus in plant and insect vectors. | a simple, rapid, inexpensive method for the localization of virus transcripts in plant and insect vector tissues is reported here. the method based on fluorescent in situ hybridization using short dna oligonucleotides complementary to an rna segment representing a virus transcript in the infected plant or insect vector. the dna probe harbors a fluorescent molecule at its 5' or 3' ends. the protocol: simple fixation, hybridization, minimal washing and confocal microscopy, provides a highly specif ... | 2009 | 19406154 |
| tracking the global dispersal of a cosmopolitan insect pest, the peach potato aphid. | global commerce and human transportation are responsible for the range expansion of various insect pests such as the plant sucking aphids. high resolution dna markers provide the opportunity to examine the genetic structure of aphid populations, identify aphid genotypes and infer their evolutionary history and routes of expansion which is of value in developing management strategies. one of the most widespread aphid species is the peach-potato aphid myzus persicae, which is considered as a serio ... | 2009 | 19432979 |
| sporulation, storage and infectivity of obligate aphid pathogen pandora nouryi grown on novel granules of broomcorn millet and polymer gel. | producing granular cultures of obligate aphid pathogen pandora nouryi for improved sporulation and storage. | 2009 | 19457028 |
| hypersensitive response to aphis gossypii glover in melon genotypes carrying the vat gene. | aphis gossypii glover causes direct and indirect damage to cucumis melo l. crops. to decrease the harmful effects of this pest, one of the most economically and environmentally acceptable options is to use genetically resistant melon varieties. to date, several sources of resistance carrying the vat gene are used in melon breeding programmes that aim to prevent a. gossypii colonization and the subsequent aphid virus transmission. the results suggest that the resistance conferred by this gene is ... | 2009 | 19474089 |
| influence of the potato leafroll virus and virus-infected plants on the arrestment of the aphid, myzus persicae. | a series of experiments was conducted using membrane sachets containing mp148 diet or phosphate-buffered sucrose with and without purified potato leafroll virus to determine if direct encounter with the virus would arrest the aphid, myzus persicae (sulzer) (homoptera: aphididae). in only two out of 36 tests were there significantly more aphids settled on sachets containing the virus. in all other tests, there were either significantly fewer aphids on sachets containing virus or there were no dif ... | 2006 | 19537970 |
| esterase-based resistance in the tobacco-adapted form of the green peach aphid, myzus persicae (sulzer) (hemiptera: aphididae) in the eastern united states. | organophosphates and carbamates represent alternative insecticides in managing the tobacco-adapted form of the green peach aphid (tgpa), myzus persicae (sulzer), a major pest of tobacco in the united states and around the world. general esterases that detoxify these insecticides were assessed in green, red, and orange morphs of field-collected m. persicae. a total of 136 aphid colonies were collected from 2004 though 2007 and screened for total esterase activity. the green morphs had lower ester ... | 2009 | 19557739 |
| myzus persicae (green peach aphid) salivary components induce defence responses in arabidopsis thaliana. | myzus persicae (green peach aphid) feeding on arabidopsis thaliana induces a defence response, quantified as reduced aphid progeny production, in infested leaves but not in other parts of the plant. similarly, infiltration of aphid saliva into arabidopsis leaves causes only a local increase in aphid resistance. further characterization of the defence-eliciting salivary components indicates that arabidopsis recognizes a proteinaceous elicitor with a size between 3 and 10 kd. genetic analysis usin ... | 2009 | 19558622 |
| quantitative estimation of plum pox virus targets acquired and transmitted by a single myzus persicae. | the viral charge acquired and inoculated by single aphids in a non-circulative transmission is estimated using plum pox virus (ppv). a combination of electrical penetration graph and taqman real-time rt-pcr techniques was used to establish the average number of ppv rna targets inoculated by an aphid in a single probe (26,750), approximately half of the acquired ones. this number of ppv targets is responsible for a systemic infection of 20% on the inoculated receptor plants. no significant differ ... | 2009 | 19597934 |
| [toxicity of vitex negundo extract to aphids and its co-toxicity with imidacloprid]. | in this paper, the toxicity of vitex negundo seed dichloromethane extract, imidacloprid, and omethoate to aphis citricola, aphis gossypii, and myzus persicae was determined by impregnation method, and the co-toxicity of the seed extract and imidacloprid to a. gossypii as well as the repellent effect of the extract and test insecticides to m. persicae were tested by topical application of capillary tube and by selection in culture dish, respectively. the results showed that the lc50 of v. negundo ... | 2009 | 19637611 |
| honeydew feeding in the solitary bee osmia bicornis as affected by aphid species and nectar availability. | like honey bees (apis mellifera), non-apis bees could exploit honeydew as a carbohydrate source. in addition to providing carbohydrates, this may expose them to potentially harmful plant products secreted in honeydew. however, knowledge on honeydew feeding by solitary bees is very scarce. here we determine whether the polylectic solitary bee osmia bicornis (=o. rufa) collects honeydew under semi-field conditions, and whether this is affected by aphid species and presence of floral nectar. bees w ... | 2009 | 19699745 |
| host foraging for differentially adapted brassica-feeding aphids by the braconid parasitoid diaeretiella rapae. | interactions occurring in a tritrophic system comprising plants, aphids and parasitoids are of great complexity. the generalist endoparasitoid diaeretiella rapae (mcintosh) (hymenoptera: aphidiidae) displays specialist characteristics on brassica feeding aphids. previously, we studied differential signalling to d. rapae by specialist and generalist brassicaceae feeding aphids on turnip. we reported no differences in the attractiveness of volatile compounds from the two turnip/aphid complexes. ho ... | 2008 | 19704475 |
| plants under attack: multiple interactions with insects and microbes. | to defend themselves, plants activate inducible defense mechanisms that are effective against the invader that is encountered. there is partial overlap in the defense signaling pathways that are induced by insect herbivores and microbial pathogens that may result in cross-resistance. we have previously shown that infestation by tissue-chewing pieris rapae larvae induces resistance in arabidopsis thaliana against subsequent attack by the microbial pathogens pseudomonas syringae pv. tomato (pst), ... | 2007 | 19704549 |
| contribution of glucosinolate transport to arabidopsis defense responses. | accumulation of glucosinolates, a class of defense-related secondary metabolites found almost exclusively in the capparales, is induced in response to a variety of biological stresses. it is often assumed that elevated glucosinolate levels result from de novo biosynthesis, but glucosinolate transport from other parts of the plant to the site of herbivory or pathogen infection can also contribute to the defense response. several studies with arabidopsis and other crucifers have demonstrated that ... | 2007 | 19704682 |
| a comparison of low temperature tolerance traits between closely related aphids from the tropics, temperate zone, and arctic. | the survival of aphids exposed to low temperatures is strongly influenced by their ability to move within and between plants and to survive exposure to potentially lethal low temperatures. little is known about the physiological and behavioural limitations on aphid movement at low temperatures or how they may relate to lethal temperature thresholds. these questions are addressed here through an analysis of the thermal ecology of three closely related aphid species: myzus persicae, a ubiquitous t ... | 2010 | 19723528 |
| effect of commercially available plant-derived essential oil products on arthropod pests. | plant-derived essential oil products, in general, are considered minimum-risk pesticides and are exempt from environmental protection agency registration under section 25(b) of the federal insecticide fungicide and rodenticide act. however, many of the plant-derived essential products available to consumers (homeowners) have not been judiciously evaluated for both efficacy and plant safety. in fact, numerous plant-derived essential oil products labeled for control of arthropod pests have not bee ... | 2009 | 19736770 |
| hyperthermic aphids: insights into behaviour and mortality. | although the impact of warming on winter limitation of aphid populations is reasonably well understood, the impacts of hot summers and heat wave events are less clear. in this study, we address this question through a detailed analysis of the thermal ecology of three closely related aphid species: myzus persicae, a widespread, polyphagous temperate zone pest, myzus polaris, an arctic aphid potentially threatened by climate warming, and, myzus ornatus, a glasshouse pest that may benefit from warm ... | 2010 | 19737571 |
| antifeedant and cytotoxic activity of longipinane derivatives. | the polyoxygenated longipinane derivatives 1- 8 were tested as antifeedant compounds against the herbivorous insects spodoptera littoralis, rhopalosiphum padi, and myzus persicae. compounds 1-3 and 8 exhibited significant antifeedant activity against s. littoralis and m. persicae. the antifeedant activity against s. littoralis increased moderately after the c-8 hydroxy group in 3 was removed to afford 1 and increased strongly after the remaining two hydroxy groups were acetylated to afford 2. co ... | 2010 | 19742424 |
| complementation analysis of triple gene block of potato virus s (pvs) revealed its capability to support systemic infection and aphid transmissibility of recombinant potato virus x. | triple gene block (tgb) sequences derived from isolates of ordinary potato virus s (pvs-o) and chenopodium-systemic (pvs-cs) were analyzed. although the tgb sequences did not reveal any specific difference within the 7k protein, some specific differences within the 25k and 12k orfs were found. in order to investigate a possible functional divergence of pvs-o and pvs-cs tgb variants, these genes were propagated in chimeric potato virus x (pvx). both pvs tgb variants partly complemented pvx tgb in ... | 2009 | 19748533 |
| a mutation in amino acid permease aap6 reduces the amino acid content of the arabidopsis sieve elements but leaves aphid herbivores unaffected. | the aim of this study was to investigate the role of the amino acid permease gene aap6 in regulating phloem amino acid composition and then to determine the effects of this altered diet on aphid performance. a genotype of arabidopsis thaliana (l.) was produced in which the function of the amino acid permease gene aap6 (at5g49630) was abolished. plants homozygous for the insertionally inactivated aap6 gene had a significantly larger mean rosette width than the wild type and a greater number of ca ... | 2010 | 19755569 |
| a strain of the bacterial symbiont regiella insecticola protects aphids against parasitoids. | aphids commonly harbour facultative bacterial endosymbionts and may benefit from their presence through increased resistance to parasitoids. this has been demonstrated for hamiltonella defensa and serratia symbiotica, while a third common endosymbiont, regiella insecticola, did not provide such protection. however, this symbiont was recently detected in a highly resistant clone of the peach-potato aphid, myzus persicae, from australia. to test if resistance was indeed conferred by the endosymbio ... | 2010 | 19776066 |
| influence of silicon on resistance of zinnia elegans to myzus persicae (hemiptera: aphididae). | studies were conducted to examine the effect of treating zinnia elegans jacq. with soluble silicon on the performance of the green peach aphid, myzus persicae (sulzer). z. elegans plants were irrigated every 2 d throughout the duration of the experiment with a nutrient solution amended with potassium silicate (k2sio2), or a nutrient solution without k2sio2. length of the prereproductive period and survivorship of m. persicae were not affected by k2sio2 treatment, but total cumulative fecundity a ... | 2009 | 19791606 |
| parasitized aphids are inferior prey for a coccinellid predator: implications for intraguild predation. | discussions of intraguild predation (igp) have assumed that the nutritional quality of intraguild (ig) prey is similar to that of any other prey available to the ig predator. it has been suggested therefore that generalist predators do not distinguish between healthy and parasitized aphids and thus function as facultative predators of parasitoids. more recent studies have shown that predators may selectively ingest prey of various nutritional qualities and that predators may have higher body nit ... | 2009 | 19791609 |
| population fluctuation and faunal indices of aphids (hemiptera, aphididae) in peach orchards in araucária, pr. | aphids are sap-sucking insects that mainly attack shoots and young leaves of peach trees and many other plant species; however, knowledge of the brazilian aphid fauna is scant. the objective of this study was to identify aphid species collected in peach orchards (prunus persica batsch) and to determine their faunal indices for occurrence and dominance. the experiment was conducted from july 2005 to september 2006 in six chimarrita peach orchards in the municipality of araucária, pr, brazil. the ... | 2009 | 19802456 |
| specific loops d, e and f of nicotinic acetylcholine receptor beta1 subunit may confer imidacloprid selectivity between myzus persicae and its predatory enemy pardosa pseudoannulata. | one nicotinic acetylcholine receptor non-alpha subunit was cloned from the pond wolf spider, pardosa pseudoannulata, an important predatory enemy of some insect pests with agricultural importance, such as the green peach aphid myzus persicae. the subunit shows high amino acid identities to insect beta1 subunits (74-78%), and was denoted as ppbeta1. although high identities are found between ppbeta1 and insect beta1 subunits, amino acid differences are found within loops d, e and f, important seg ... | 2009 | 19818849 |
| changes in green peach aphid responses to potato leafroll virus-induced volatiles emitted during disease progression. | previous research has shown that green peach aphids, myzus persicae (sulzer), preferentially settle on leaflets of potato plants (solanum tuberosum l.) infected with potato leafroll virus (plrv) compared with sham-inoculated controls, at least in part because of aphid responses to volatile cues from the plants. the prior work used plants 4 wk after inoculation. in this study, aphid emigration from the vicinity of leaflets of plrv-infected plants at 2, 4, 6, 8, and 10 wk after inoculation was com ... | 2009 | 19825298 |
| capsid protein of cowpea chlorotic mottle virus is a determinant for vector transmission by a beetle. | cowpea chlorotic mottle virus (ccmv) is a bromovirus transmitted by species of chrysomelid beetles, including the spotted cucumber beetle, diabrotica undecimpunctata howardii barber. an experimental system was set up to identify the viral determinant(s) of the beetle transmission of ccmv. nicotiana clevelandii was selected as an experimental plant host because it supports the replication and accumulation of both ccmv and a second member of the family bromoviridae, cucumber mosaic virus (cmv). us ... | 2010 | 19828763 |
| design, synthesis and biological activity of new strobilurin derivatives with a 1h-pyrazol-5-oxy side chain. | a series of new strobilurin derivatives with a substituted pyrazole side chain (5 and 6) were designed and synthesized. the new derivatives were synthesized from substituted phenones as starting material via esterification, cyclization and condensation reactions. all compounds were identified by 1h nmr and ir spectral and elemental analyses. preliminary biological evaluation showed that some of the compounds had good fungicidal activity against cucumber downy mildew (cdm) and wheat powdery milde ... | 2009 | 19831032 |
| varying responses of insect herbivores to altered plant chemistry under organic and conventional treatments. | the hypothesis that plants supplied with organic fertilizers are better defended against insect herbivores than those supplied with synthetic fertilizers was tested over two field seasons. organic and synthetic fertilizer treatments at two nitrogen concentrations were supplied to brassica plants, and their effects on the abundance of herbivore species and plant chemistry were assessed. the organic treatments also differed in fertilizer type: a green manure was used for the low-nitrogen treatment ... | 2010 | 19906673 |
| biotic and abiotic regulation of resting spore formation in vivo of obligate aphid pathogen pandora nouryi: modeling analysis and biological implication. | entomophthoralean fungus pandora nouryi is an obligate aphid pathogen that enables to produce resting spores (azygospores) for surviving host absence. to explore possible mechanisms involved in the regulation of resting spore formation in vivo, host cohorts consisting of 40-60 nymphs of green peach aphid myzus persicae produced within 24h on cabbage leaf discs in petri dishes were exposed to spore showers of p. nouryi at the concentrations (c) from a very few to nearly 2000 conidia/mm(2) and the ... | 2010 | 19931538 |
| reproductive performance of asexual clones of the peach-potato aphid, ( myzus persicae, homoptera: aphididae), colonising scotland in relation to host plant and field ecology. | the population of peach-potato aphid, myzus persicae (sulzer), in scotland comprises large numbers of a few superclones with much smaller numbers of other clones, and the reason for their differential success has yet to be elucidated. in the current study, the reproduction of lineages derived from these clones was measured by counting the numbers of offspring produced by a one-day-old nymph after 15 days. this was measured on four plant species, including local agricultural hosts and at two diff ... | 2010 | 19941675 |
| metabolic enzyme(s) confer imidacloprid resistance in a clone of myzus persicae (sulzer) (hemiptera: aphididae) from greece. | previous studies have reported varying levels of resistance against imidacloprid in several insect species, including populations of the peach-potato aphid, myzus persicae (sulzer). these cases of resistance have been attributed to either target-site resistance or enhanced detoxification. in this study, a clone of m. persicae originating from greece revealed a 60-fold resistance factor to imidacloprid. | 2010 | 19950404 |
| screening of uruguayan plants for deterrent activity against insects. | we evaluated the anti-insectan activity of extracts from different vegetative parts of ten plant species native to uruguay. the selected plants belong to five families: bignoniaceae: clytostoma callistegioides, dolichandra cynanchoides, macfadyena unguis-cati; sapindaceae: dodonaea viscosa, allophylus edulis, serjania meridionalis; lamiaceae: salvia procurrens, salvia guaranitica; solanaceae: lycium cestroides; and phytolaccaceae: phytolacca dioica. the extracts were evaluated in independent bio ... | 0 | 20046902 |
| impact of plant growth-promoting rhizobacteria and natural enemies on myzus persicae (hemiptera: aphididae) infestations in pepper. | management of green peach aphid, myzus persicae (sulzer) (hemiptera: aphididae), in bell pepper, capsicum annuum l., was explored through a combination of plant growth-promoting rhizobacteria (pgpr) and endemic biological control in new york in 2006 and 2007. we hypothesized that by using pgpr-treated peppers 1) m. persicae infestations would be reduced via induced resistance, 2) natural enemies would be lured to plants through the elicitation of volatile organic compounds, and 3) yield amount a ... | 2009 | 20069847 |
| construction of beauveria bassiana t-dna insertion mutant collections and identification of thermosensitive and osmosensitive mutants. | this study was to identify genes involved in thermotolerance and osmotolerance of beauveria bassiana. | 2009 | 20069875 |
| deceptive chemical signals induced by a plant virus attract insect vectors to inferior hosts. | previous studies have shown that vector-borne pathogens can alter the phenotypes of their hosts and vectors in ways that influence the frequency and nature of interactions between them, with significant implications for the transmission and spread of disease. for insect-borne pathogens, host odors are particularly likely targets for manipulation, because both plant- and animal-feeding insects use volatile compounds derived from their hosts as key foraging cues. here, we document the effects of a ... | 2010 | 20133719 |
| evaluation of the biocontrol potential of various metarhizium isolates against green peach aphid myzus persicae (homoptera: aphididae). | twenty-three isolates of metarhizium anisopliae (metschnikof) sorokin and m. acridum (driver & milner) jf bischoff, rehner & humber from non-aphid host insects around the globe were evaluated for their aphid biocontrol potential, which is not well known. | 2010 | 20201034 |
| a peptide that binds the pea aphid gut impedes entry of pea enation mosaic virus into the aphid hemocoel. | development of ways to block virus transmission by aphids could lead to novel and broad-spectrum means of controlling plant viruses. viruses in the luteoviridae enhanced are obligately transmitted by aphids in a persistent manner that requires virion accumulation in the aphid hemocoel. to enter the hemocoel, the virion must bind and traverse the aphid gut epithelium. by screening a phage display library, we identified a 12-residue gut binding peptide (gbp3.1) that binds to the midgut and hindgut ... | 2010 | 20223498 |
| monitoring for imidacloprid resistance in the tobacco-adapted form of the green peach aphid, myzus persicae (sulzer) (hemiptera: aphididae), in the eastern united states. | imidacloprid is the primary insecticide for controlling the tobacco-adapted form of the green peach aphid (tgpa), myzus persicae (sulzer), a major pest of tobacco worldwide. this study used leaf-dip bioassays to assess tgpa resistance to imidacloprid in the eastern united states from 2004 through 2007. | 2010 | 20309995 |
| evaluation of systemic insecticides for green peach aphid control on tobacco. | 1971 | 20333851 | |
| behavioral evidence for local reduction of aphid-induced resistance. | twenty-five aphids of three different species, brevicoryne brassicae l, myzus persicae schulzer, and rhopalosiphum padi l(hemiptera: aphididae) were each allowed to infest leaves of a young plant of their respective host plant species for 4 days, except that the oldest expanded leaf (the 'systemic' leaf) was kept free of aphids. each preinfested plant thus had two types of leaves, local leaves (preinfested with aphids) and one systemic leaf, the oldest true leaf that had been kept free of aphids ... | 2007 | 20345289 |
| pad4-dependent antibiosis contributes to the ssi2-conferred hyper-resistance to the green peach aphid. | myzus persicae, commonly known as green peach aphid (gpa), is a sap-sucking insect with a broad host range. arabidopsis thaliana responds to gpa infestation with elevated expression of the phytoalexin deficient4 (pad4) gene. previously, we had demonstrated that the loss of pad4 gene function compromises arabidopsis resistance to gpa. in contrast, a mutation in the arabidopsis suppressor of salicylic acid insensitivity2 (ssi2) gene, which encodes a desaturase involved in lipid metabolism, resulte ... | 2010 | 20367470 |
| relation of aphicidal activity with cuticular degradation by beauveria bassiana sfb-205 supernatant incorporated with polyoxyethylene-(3)-isotridecyl ether. | the application of beauveria bassiana sfb-205 supernatant incorporated with polyoxyethylene-(3)-isotridecyl ether (tde-3) significantly reduced the population of two species of aphids including cotton aphid, aphis gossypii, and green peach aphid, myzus persicae, much higher in cotton aphid, compared with supernatant incorporated with tween 80, which allows the relationship of aphicidal activity with the degradation of aphid cuticles to be determined. overall, the degradation of the cuticles indu ... | 2010 | 20372019 |
| binding properties of the n-acetylglucosamine and high-mannose n-glycan pp2-a1 phloem lectin in arabidopsis. | phloem protein2 (pp2) is a component of the phloem protein bodies found in sieve elements. we describe here the lectin properties of the arabidopsis (arabidopsis thaliana) pp2-a1. using a recombinant protein produced in escherichia coli, we demonstrated binding to n-acetylglucosamine oligomers. glycan array screening showed that pp2-a1 also bound to high-mannose n-glycans and 9-acyl-n-acetylneuraminic sialic acid. fluorescence spectroscopy-based titration experiments revealed that pp2-a1 had two ... | 2010 | 20442276 |
| design, synthesis, and insecticidal activities of phthalamides containing a hydrazone substructure. | fluobendiamide is the first commercialized artificial synthetic insecticide acting on the ryanodine receptor. this new molecule possesses a combination of excellent insecticidal activity and eco-friendly characteristics with a skeleton structure of phthalamide. in this study, we incorporated hydrazone, present in many pesticidal compounds reported during the last two decades, into phthalamide derivatives via schiff-base condensation and aminolysis to obtain 21 new compounds; these compounds were ... | 2010 | 20450195 |
| comparative analysis of the acyrthosiphon pisum genome and expressed sequence tag-based gene sets from other aphid species. | to study gene repertoires and their evolution within aphids, we compared the complete genome sequence of acyrthosiphon pisum (reference gene set) and expressed sequence tag (est) data from three other species: myzus persicae, aphis gossypii and toxoptera citricida. we assembled ests, predicted coding sequences, and identified potential pairs of orthologues (reciprocical best hits) with a. pisum. pairwise comparisons show that a fraction of the genes evolve fast (high ratio of non-synonymous to s ... | 2010 | 20482638 |
| comparative analysis of detoxification enzymes in acyrthosiphon pisum and myzus persicae. | herbivorous insects use detoxification enzymes, including cytochrome p450 monooxygenases, glutathione s-transferases, and carboxy/cholinesterases, to metabolize otherwise deleterious plant secondary metabolites. whereas acyrthosiphon pisum (pea aphid) feeds almost exclusively from the fabaceae, myzus persicae (green peach aphid) feeds from hundreds of species in more than forty plant families. therefore, m. persicae as a species would be exposed to a greater diversity of plant secondary metaboli ... | 2010 | 20482647 |
| molecular cloning and characterization of a prenyltransferase from the cotton aphid, aphis gossypii. | prenyltransferases play a key role in isoprenoid biosynthesis. here, a cdna encoding a prenyltransferase was isolated from the cotton aphid, aphis gossypii, which consists of 1354 nucleotides and encodes a protein of 394 amino acids (agipps). subsequent sequencing of agipps genomic dna resulted in one 3138-bp sequence. southern blotting analysis indicated that only a single ipps gene exists in the cotton aphid. real-time quantitative pcr showed that agipps transcripts were mainly present at the ... | 2010 | 20510361 |
| induced defense by bemisia tabaci biotype b (hemiptera: aleyrodidae) in tobacco against myzus persicae (hemiptera: aphididae). | myzus persicae and bemisia tabaci are serious pests of tobacco and can occur simultaneously on the same plant. we found that tobacco plants infested by whiteflies had fewer aphids than those without whiteflies. to determine whether b. tabaci feeding could induce plant defense against aphids locally and systemically, we determined the effects of b. tabaci on several biological parameters of m. persicae on tobacco. infestation of b. tabaci nymphs reduced survival rates of m. persicae by 30.0%. in ... | 2010 | 20550802 |
| beet poleroviruses: close friends or distant relatives? | summary taxonomy: there are three members of the genus polerovirus (family luteoviridae) that induce yellowing of sugar beet: beet mild yellowing virus (bmyv), beet chlorosis virus (bchv) and beet western yellows virus-usa (bwyv-usa, fig. 1). non-beet-infecting isolates of bwyv found particularly within europe have now been re-named turnip yellows virus (tuyv). species-specific antibodies are unavailable, but the viruses can be distinguished by rt-pcr using primers specifically designed to the 5 ... | 2005 | 20565633 |
| a barley cysteine-proteinase inhibitor reduces the performance of two aphid species in artificial diets and transgenic arabidopsis plants. | cystatins from plants have been implicated in plant defense towards insects, based on their role as inhibitors of heterologous cysteine-proteinases. we have previously characterized thirteen genes encoding cystatins (hvcpi-1 to hvcpi-13) from barley (hordeum vulgare), but only hvcpi-1 c68 → g, a variant generated by direct-mutagenesis, has been tested against insects. the aim of this study was to analyze the effects of the whole gene family members of barley cystatins against two aphids, myzus p ... | 2011 | 20567901 |
| turnip mosaic virus and the quest for durable resistance. | summary taxonomy: turnip mosaic virus (tumv) is a member of the genus potyvirus (type species potato virus y) in the family potyviridae. to date, tumv is the only potyvirus known to infect brassicas. there are potyvirus isolates that appear serologically similar to tumv when tested with polyclonal antisera that do not readily infect brassicas (lesemann and vetten, 1985). physical properties: virions are approximately 720 x 15-20 nm flexuous rods (fig. 1) and are composed of 95% coat protein (cp) ... | 2002 | 20569337 |
| influence of exposure to imidacloprid on survivorship, reproduction and vitellin content of the carmine spider mite, tetranychus cinnabarinus. | occasional reports linking neonicotinoid insecticide applications to field population outbreaks of the spider mite have been a topic of concern for integrated pest management programs. to elucidate the impacts of a neonicotinoid insecticide on the carmine spider mite, tetranychus cinnabarinus boisduval (acari: tetranychidae), the survivorship, reproduction, and vitellin contents of the mite were investigated after exposure to various concentrations of imidacloprid on the v. unguiculata leaf disc ... | 2010 | 20578884 |
| differential consumption of four aphid species by four lady beetle species. | the acceptability of four different aphid species macrosiphum albifrons (essig), macrosiphum euphorbiae (thomas), macrosiphum pseudorosae patch, and myzus persicae (sulzer) (hemiptera: aphididae), as prey for four lady beetle species, one native species coccinella trifasciata l, and three non-native coccinella septempunctata l, harmonia axyridis pallas, propylea quatuordecimpunctata l (coleoptera: coccinellidae) were tested in the laboratory. the relative field abundance of adults of the same la ... | 2010 | 20578952 |
| amplification of a cytochrome p450 gene is associated with resistance to neonicotinoid insecticides in the aphid myzus persicae. | the aphid myzus persicae is a globally significant crop pest that has evolved high levels of resistance to almost all classes of insecticide. to date, the neonicotinoids, an economically important class of insecticides that target nicotinic acetylcholine receptors (nachrs), have remained an effective control measure; however, recent reports of resistance in m. persicae represent a threat to the long-term efficacy of this chemical class. in this study, the mechanisms underlying resistance to the ... | 2010 | 20585623 |
| local and broadscale landscape structure differentially impact predation of two potato pests. | agricultural habitats are the recipients of ecosystem services provided by mobile arthropods like pollinators and natural enemies. these organisms can disperse between non-crop habitats and crops and can benefit from resources in non-crop areas. thus, it may be important to conserve non-crop habitats to maintain ecosystem services within crops. however, even single ecosystem services, such as pollination or predation of pests, may be provided by a complex of species. different species may respon ... | 2010 | 20597294 |
| elevated co2 shifts the focus of tobacco plant defences from cucumber mosaic virus to the green peach aphid. | elevation in co(2) concentration broadly impacts plant physiological characteristics, which influences herbivores and biotrophic pathogens, which in turn regulate the plant defensive response. in this study, responses of tobacco plants to stress in the form of the green peach aphid, myzus persicae (sulzer), or cucumber mosaic virus (cmv), or both aphid and cmv combined were investigated in open-top chambers under ambient and elevated co(2) concentrations. we measured aboveground biomass and foli ... | 2010 | 20626646 |
| the helper-component protease transmission factor of tobacco etch potyvirus binds specifically to an aphid ribosomal protein homologous to the laminin receptor precursor. | potyviruses are plant pathogens transmitted by aphids in a non-persistent manner. during transmission, the virus-encoded factor helper-component protease (hcpro) is presumed to act as a molecular bridge, mediating the reversible retention of virions to uncharacterized binding sites in the vector mouthparts. whilst the predicted interaction between hcpro and the coat protein (cp) of virions has been confirmed experimentally, the characterization of putative hcpro-specific receptors in aphids has ... | 2010 | 20631085 |
| uv-b impact on aphid performance mediated by plant quality and plant changes induced by aphids. | plants face various abiotic and biotic environmental factors and therefore need to adjust their phenotypic traits on several levels. uv-b radiation is believed to impact herbivorous insects via host plant changes. plant responses to abiotic challenges (uv-b radiation) and their interaction with two aphid species were explored in a multifactor approach. broccoli plants [brassica oleracea l. convar. botrytis (l.), brassicaceae] were grown in two differently covered greenhouses, transmitting either ... | 2010 | 20636911 |
| fungi associated with the hemlock woolly adelgid, adelges tsugae, and assessment of entomopathogenic isolates for management. | fungi associated with the hemlock wooly adelgid, adelges tsugae annand (hemiptera: adelgidae), were collected throughout the eastern usa and southern china. twenty fungal genera were identified, as were 79 entomopathogenic isolates, including: lecanicillium lecanii (zimmermann) (hypocreales: insertae sedis), isaria farinosa (holm: fries.) (cordycipitaceae), beauveria bassiana (balasamo) (hyphomycetes), and fusarium spp (nectriaceae). the remaining fungal genera associated with insect cadavers we ... | 2010 | 20672977 |
| alarm pheromone habituation in myzus persicae has fitness consequences and causes extensive gene expression changes. | in most aphid species, facultative parthenogenetic reproduction allows rapid growth and formation of large single-genotype colonies. upon predator attack, individual aphids emit an alarm pheromone to warn the colony of this danger. (e)-beta-farnesene (ebf) is the predominant constituent of the alarm pheromone in myzus persicae (green peach aphid) and many other aphid species. continuous exposure to alarm pheromone in aphid colonies raised on transgenic arabidopsis thaliana plants that produce eb ... | 2010 | 20679203 |
| volatile organic compound emissions induced by the aphid myzus persicae differ among resistant and susceptible peach cultivars and a wild relative. | little is known on aphid-induced emissions of volatile organic compounds (vocs) from trees and particularly on their intraspecific variability in association with resistance traits. we compared voc emissions from five peach cultivars (prunus persica (l.) batsch) and a wild relative (prunus davidiana (carrière) franch) that differ in their level (susceptible/resistant) and type (antixenosis, antibiosis) of resistance to the green peach aphid, myzus persicae (sulzer). additionally, the kinetics of ... | 2010 | 20739428 |
| thirty-seven transcription factor genes differentially respond to a harpin protein and affect resistance to the green peach aphid in arabidopsis. | the harpin protein hrpn ea induces arabidopsis resistance to the green peach aphid by activating the ethylene signalling pathway and by recruiting ein2, an essential regulator of ethylene signalling, for a defence response in the plant. we investigated 37 ethylene-inducible arabidopsis transcription factor genes for their effects on the activation of ethylene signalling and insect defence. twenty-eight of the 37 genes responded to both ethylene and hrpn ea, and showed either increased or inhibit ... | 2010 | 20826953 |