Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| identification of novel sources of host plant resistance to known soybean aphid biotypes. | while soybean cultivars with resistance to the soybean aphid (aphis glycines matsumura) have been commercially released, the presence of virulent biotypes capable of overcoming plant resistance threatens the durability of host plant resistance as a stable management tactic. novel sources of host plant resistance are needed to combat rapid biotype evolution. in this study, we screened 1,061 soybean plant introductions (pis) for resistance to three known biotypes of a. glycines. based on a series ... | 2013 | 23865217 |
| soybean aphid (aphididae: hemiptera) population growth as affected by host plant resistance and an insecticidal seed treatment. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae) is a significant soybean pest in the north central united states. insecticidal seed treatments and host plant resistance are two commercially available management tools. here we investigate the efficacy of both management tools throughout the season. soybean lines containing the soybean aphid resistance genes rag1, rag2, or both rag1 + rag2 were compared with a near-isogenic aphid-susceptible line. each line was grown in field pl ... | 2013 | 23865195 |
| evaluation of late vegetative and reproductive stage soybeans for resistance to soybean aphid (hemiptera: aphididae). | the soybean aphid, aphis glycines matsumura, has become the most significant soybean [glycine max (l.) merrill] insect pest in the north central soybean production region of north america. the objectives of this research were to measure selected genotypes for resistance to the soybean aphid in the later vegetative and reproductive stages under field conditions, and confirm the presence of tolerance in ks4202. the results from 2007 to 2011 indicate that ks4202 can support aphid populations with m ... | 2013 | 23786098 |
| genetic mapping of a novel gene for soybean aphid resistance in soybean (glycine max [l.] merr.) line p203 from china. | the soybean aphid (sa: aphis glycines matsumura) is a worldwide pest of soybean (glycine max [l.] merr.). the objectives of this study were to identify the type of aphid resistance and the resistance phenotype in soybean line 'p203', and to map the relative position of the gene involved. compared with cultivars 'p746' and 'dongnong 47', p203 was demonstrated to possess antixenosis resistance. p203 prevented aphids from reproducing in a choice test, but the resistance level decreased significantl ... | 2013 | 23754637 |
| mapping soybean aphid resistance genes in pi 567598b. | the soybean aphid (aphis glycines matsumura) has been a major pest of soybean [glycine max (l.) merr.] in north america since it was first reported in 2000. our previous study revealed that the strong aphid resistance of plant introduction (pi) 567598b was controlled by two recessive genes. the objective of this study was to locate these two genes on the soybean genetic linkage map using molecular markers. a mapping population of 282 f4:5 lines derived from ia2070 × e06902 was evaluated for aphi ... | 2013 | 23689742 |
| the endosymbiont arsenophonus is widespread in soybean aphid, aphis glycines, but does not provide protection from parasitoids or a fungal pathogen. | aphids commonly harbor bacterial facultative symbionts that have a variety of effects upon their aphid hosts, including defense against hymenopteran parasitoids and fungal pathogens. the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is infected with the symbiont arsenophonus sp., which has an unknown role in its aphid host. our research goals were to document the infection frequency and diversity of the symbiont in field-collected soybean aphids, and to determine whether arseno ... | 2013 | 23614027 |
| genetic mapping of three quantitative trait loci for soybean aphid resistance in pi 567324. | host-plant resistance is an effective method for controlling soybean aphid (aphis glycines matsumura), the most damaging insect pest of soybean (glycine max (l.) merr.) in north america. recently, resistant soybean lines have been discovered and at least four aphid resistance genes (rag1, rag2, rag3 and rag4) have been mapped on different soybean chromosomes. however, the evolution of new soybean aphid biotypes capable of defeating host-plant resistance conferred by most single genes demonstrate ... | 2013 | 23486080 |
| lysiphlebus orientalis (hymenoptera, braconidae), a new invasive aphid parasitoid in europe - evidence from molecular markers. | we report the occurrence of lysiphlebus orientalis in serbia, an aphid parasitoid from the far east that is new to europe and has the potential to become invasive. our finding based on morphological characters is confirmed by analyses of mitochondrial cytochrome oxidase subunit i sequences. an increase in number and an expansion of the host range were observed during field studies over the past two years, and it is determined that the current host range encompasses nine aphid hosts on 12 differe ... | 2013 | 23448286 |
| molecular characterization and expression analysis of soluble trehalase gene in aphis glycines, a migratory pest of soybean. | in insects, the enzyme trehalase plays a crucial role in energy metabolism, chitin synthesis and possibly during plant-insect interactions. we have characterized a soluble trehalase gene (tre-1) from cdna of aphis glycines, a serious migratory pest of soybean. the full-length cdna of tre-1 in a. glycines (aytre-1) was 2550 bp long with an open reading frame of 1770 bp that encoded for a 589 amino acid residues protein. sequence assessment and phylogenetic analysis of the putative protein suggest ... | 2013 | 23445549 |
| within-plant bottom-up effects mediate non-consumptive impacts of top-down control of soybean aphids. | there is increasing evidence that top-down controls have strong non-consumptive effects on herbivore populations. however, little is known about how these non-consumptive effects relate to bottom-up influences. using a series of field trials, we tested how changes in top-down and bottom-up controls at the within-plant scale interact to increase herbivore suppression. in the first experiment, we manipulated access of natural populations of predators (primarily lady beetles) to controlled numbers ... | 2013 | 23431373 |
| core rnai machinery and sid1, a component for systemic rnai, in the hemipteran insect, aphis glycines. | rna interference (rnai) offers a novel tool to manage hemipteran pests. for the success of rnai based pest control in the field, a robust and systemic rnai response is a prerequisite. we identified and characterized major genes of the rnai machinery, dicer2 (dcr2), argonaute2 (ago2), and r2d2 in aphis glycines, a serious pest of soybean. the a. glycines genome encodes for at least one copy of dcr2, r2d2 and ago2. comparative and molecular evolution analyses (dn/ds) showed that domain regions of ... | 2013 | 23396108 |
| inheritance of resistance to aphis glycines in soybean p746 from china. | the soybean aphid (aphis glycines matsumura) is one of the most serious pests of soybean (glycine max [l.] merrill) worldwide. aphid resistance genes have been identified. however, little is known about genes for resistance to chinese soybean aphid strains. the objective of this study was to identify the type of aphid resistance in the soybean cultivar p746 and to determine the inheritance of the resistance. in choice and no-choice tests, significant differences in the average number of aphids a ... | 2012 | 23356083 |
| a multi-approach study to delineate interactions between carabid beetles and soybean aphids. | in recent years, the soybean aphid, aphis glycines matsumura, has become the most important exotic pest of soybean, glycine max (l.) merrill, in north america. given the significant yield losses that are reported, considerable effort has been expended to characterize the natural enemy community associated with this pest. several indigenous and naturalized predators have been identified as potential biological control agents, and these include carabid beetles, an abundant and important family of ... | 2013 | 23339789 |
| the response of natural enemies to selective insecticides applied to soybean. | natural enemies of the invasive pest aphis glycines matsumura can prevent its establishment and population growth. however, current a. glycines management practices include the application of broad-spectrum insecticides that affect pests and natural enemies that are present in the field at the time of application. an alternative is the use of selective insecticides that affect the targeted pest species, although having a reduced impact on the natural enemies. we tested the effects of esfenvalera ... | 2012 | 23321105 |
| rag1 aphid resistant soybeans alter the movement and distribution of soybean aphid (hemiptera: aphididae). | herbivorous insects often move and distribute according to the quality of the plant they are on, and this behavior could influence interactions with plants bred for herbivore resistance. however, when an insect is normally considered sedentary, less is known about the potential importance of movement. we performed experiments to determine if a resistant soybean variety alters the movement and distribution, both within and between plants, of the soybean aphid aphis glycines matsumura. we did this ... | 2012 | 23321089 |
| factors contributing to the poor performance of a soybean aphid parasitoid binodoxys communis (hymenoptera: braconidae) on an herbivore resistant soybean cultivar. | host plant resistance and biological control are important components of integrated pest management programs. however, plants expressing resistance to herbivores may also have direct or indirect negative effects on natural enemies simultaneously providing pest suppression. soybean aphids (aphis glycines matsumura) are invasive and serious pests of soybean (glycine max l.) in the united states. several soybean lines with aphid resistance have been identified, but the long-term impact of these res ... | 2012 | 23321088 |
| measuring the benefit of biological control for single gene and pyramided host plant resistance for aphis glycines (hemiptera: aphididae) management. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is an economically important pest in the north central united states. in the state of iowa, economically damaging populations occurred in seven of 11 growing seasons from 2001 to 2011. the high frequency and economic impact of the soybean aphid makes it an ideal candidate for management by using host plant resistance. we compared an aphid-susceptible line to near-isolines that contain rag1 and rag2, both alone and pyramided toge ... | 2012 | 23156184 |
| characterization of a chitin synthase encoding gene and effect of diflubenzuron in soybean aphid, aphis glycines. | chitin synthases are critical enzymes for synthesis of chitin and thus for subsequent growth and development in insects. we identified the cdna of chitin synthase gene (chs) in aphis glycines, the soybean aphid, which is a serious pest of soybean. the full-length cdna of chs in a. glycines (aychs) was 5802 bp long with an open reading frame of 4704 bp that encoded for a 1567 amino acid residues protein. the predicted aychs protein had a molecular mass of 180.05 kda and its amino acid sequence co ... | 2012 | 23139631 |
| multiple phytohormone signals control the transcriptional response to soybean aphid infestation in susceptible and resistant soybean plants. | the soybean aphid (aphis glycines) is a major phloem-feeding pest of soybean (glycine max). a. glycines feeding can cause the diversion of photosynthates and transmission of plant viruses, resulting in significant yield losses. in this study, we used oligonucleotide microarrays to characterize the long-term transcriptional response to soybean aphid colonization of two related soybean cultivars, one with the rag1 aphid-resistance gene and one aphid-susceptible cultivar (without rag1). transcripto ... | 2013 | 22992001 |
| deep sequencing of the transcriptomes of soybean aphid and associated endosymbionts. | the soybean aphid has significantly impacted soybean production in the u.s. transcriptomic analyses were conducted for further insight into leads for potential novel management strategies. | 2012 | 22984624 |
| validation of reference genes for gene expression studies in aphis glycines (hemiptera: aphididae). | quantitative real-time polymerase chain reaction (qrt-pcr) is a common and robust tool for accurate quantification of mrna transcripts. to normalize results, a housekeeping gene ([hkg], reference gene or endogenous control gene) is mandatory. soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is a significant soybean, glycine max (l.) merr., pest, yet gene expression and functional genomics studies are hindered by a lack of stable hkgs. we evaluated seven potential hkgs (sdfs, succi ... | 2012 | 22928326 |
| pan trapping soybean aphids (hemiptera: aphididae) using attractants. | since its introduction into the united states in the past 10 yr, soybean aphid, aphis glycines matsumura (hemiptera: aphididae), has been a damaging pest to soybean, glycine max (l.) merrill. during 2008 and 2009, fields in central and north central iowa experienced pockets of high soybean aphid populations. electroantennograms have shown that soybean aphid alatae are capable of detecting host plant volatiles and sex pheromones. here, we evaluated baited pan traps as a potential soybean aphid at ... | 2012 | 22812127 |
| effect of soybean varieties on survival and fecundity of western corn rootworm. | the western corn rootworm, diabrotica virgifera virgifera leconte (coleoptera: chrysomelidae), is a major pest of corn (zea mays l.) in north america and has evolved resistance to crop rotation by ovipositing in alternate crops such as soybeans [glycine max (l.) merr.]. through experiments with plants grown in the greenhouse and the field, we tested whether soybeans with resistance to the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), affected survival, fecundity, and consumptio ... | 2012 | 22606835 |
| field and laboratory evaluations of soybean lines against soybean aphid (hemiptera: aphididae). | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is a major pest of soybean, glycine max (l.). merr., that significantly reduces yield in northern production areas of north america. insecticides are widely used to control soybean aphid outbreaks, but efforts are underway to develop host plant resistance as an effective alternative management strategy. here, previously identified resistant lines were evaluated in laboratory tests against field-collected populations of soybean a ... | 2012 | 22606833 |
| maintaining genetic diversity and population panmixia through dispersal and not gene flow in a holocyclic heteroecious aphid species. | heteroecious holocyclic aphids exhibit both sexual and asexual reproduction and alternate among primary and secondary hosts. most of these aphids can feed on several related hosts, and invasions to new habitats may limit the number of suitable hosts. for example, the aphid specialist aphis glycines survives only on the primary host buckthorn (rhamnus spp.) and the secondary host soybean (glycine max) in north america where it is invasive. owing to this specialization and sparse primary host dist ... | 2012 | 22549514 |
| development and parasitism by aphelinus certus (hymenoptera: aphelinidae), a parasitoid of aphis glycines (hemiptera: aphididae). | since its introduction in 2000, the soybean aphid (aphis glycines matsumura) has been a serious pest of soybean in north america. currently, insecticide application is the only recommended control method. however, a number of natural enemies have the potential to regulate soybean aphid populations. in 2007, aphelinus certus yasnosh, a soybean aphid parasitoid native to asia, was found in commercial soybean fields in ontario. this is the first record of this species in north america. to evaluate ... | 2010 | 22546454 |
| soybean cyst nematode effects on soybean aphid preference and performance in the laboratory. | herbivores on plants frequently interact via shared resources. studies that have examined performance of herbivores in the presence of other herbivores, however, have often focused on above-ground feeding guilds and relatively less research has examined interactions between below- and above-ground consumers. we examine how soybean aphid, aphis glycines (matsumura) an above-ground phloem-feeding herbivore, interacts with a below-ground plant parasite, soybean cyst nematode, heterodera glycines (i ... | 2010 | 22546453 |
| impact of rag1 aphid resistant soybeans on binodoxys communis (hymenoptera: braconidae), a parasitoid of soybean aphid (hemiptera: aphididae). | multiple strategies are being developed for pest management of the soybean aphid, aphis glycines matsumura; however, there has been little published research thus far to determine how such strategies may influence each other, thereby complicating their potential effectiveness. a susceptible soybean (glycine max l.) variety without the rag1 gene and a near isogenic resistant soybean variety with the rag1 gene were evaluated in the laboratory for their effects on the fitness of the soybean aphid p ... | 2012 | 22507000 |
| spatial distribution of aphis glycines (hemiptera: aphididae): a summary of the suction trap network. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is an economically important pest of soybean, glycine max (l.) merrill, in the united states. phenological information of a. glycines is limited; specifically, little is known about factors guiding migrating aphids and potential impacts of long distance flights on local population dynamics. increasing our understanding of a. glycines population dynamics may improve predictions of a. glycines outbreaks and improve management effo ... | 2012 | 22420279 |
| soybean aphid (hemiptera: aphididae) development on soybean with rag1 alone, rag2 alone, and both genes combined. | aphis glycines matsumura (hemiptera: aphididae) can reduce the yield of aphid-susceptible soybean (glycine max (l.) merrill) cultivars. the rag1 and rag2 genes conferresistance to some biotypes of a. glycines. these genes individually can limit population growth of a. glycines and prevent yield loss. the impact of these genes when combined is not known. we compared the development of a. glycines on soybean with rag1 alone (r1/s2), rag2 alone (s1/r2), both genes combined (r1/r2), or neither gene ... | 2012 | 22420278 |
| electrical penetration graph analysis of the feeding behavior of soybean aphids on soybean cultivars with antibiosis. | the soybean aphid, aphis glycine matsumura (hemiptera: aphididae), is a major pest of soybean. in the current study, we used the electrical penetration graph technique to study feeding behavior of soybean aphids on antibiotic-resistant soybean lines ks1621, ks1613, and ks1642, and a susceptible soybean line, ks4202. we observed that soybean aphids spent significantly shorter periods of time in the sieve element phase but slightly more times in nonprobing phases in all three resistant lines than ... | 2011 | 22299372 |
| impacts of thiamethoxam seed treatment and host plant resistance on the soybean aphid fungal pathogen, pandora neoaphidis. | since the introduction of soybean aphid, aphis glycines matsumura, from asia, insecticide use in soybean has increased substantially in the north central united states. insecticide seed treatments and aphid resistant soybean varieties are management tactics that may reduce reliance on foliar applications of broad-spectrum insecticides. exploring potential nontarget impacts of these technologies will be an important step in incorporating them into aphid management programs. we investigated impact ... | 2011 | 22299341 |
| optimal control of soybean aphid in the presence of natural enemies and the implied value of their ecosystem services. | by suppressing pest populations, natural enemies provide an important ecosystem service that maintains the stability of agricultural ecosystems systems and potentially mitigates producers' pest control costs. integrating natural control services into decisions about pesticide-based control has the potential to significantly improve the economic efficiency of pesticide use, with socially desirable outcomes. two gaps have hindered the incorporation of natural enemies into pest management decision ... | 2012 | 22208393 |
| the influence of lasius neoniger (hymenoptera: formicidae) on population growth and biomass of aphis glycines (hemiptera: aphididae) in soybeans. | in the united states, the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), are often tended by the aphid-tending ant, lasius neoniger emery (hymenoptera: formicidae). in this study, we examined the effects of tending by ants on the density and biomass of soybean aphids on soybeans in kentucky. we performed cage studies that limited access by ants and/or natural enemies. we used a split-plot design with natural enemy access as the main plot and ant attendance as the sub plot. we f ... | 2010 | 22182543 |
| olfactory preferences of popillia japonica, vanessa cardui, and aphis glycines for glycine max grown under elevated co(2). | levels of atmospheric co(2) have been increasing steadily over the last century and are projected to increase even more dramatically in the future. soybeans (glycine max l.) grown under elevated levels of co(2) have larger herbivore populations than soybeans grown under ambient levels of co(2). increased abundance could reflect the fact that these herbivores are drawn in by increased amounts of volatiles or changes in the composition of volatiles released by plants grown under elevated co(2) co ... | 2010 | 22127180 |
| soybean aphid and soybean cyst nematode interactions in the field and effects on soybean yield. | how above- and belowground plant pests interact with each other and how these interactions affect productivity is a relatively understudied aspect of crop production. soybean cyst nematode, heterodera glycines ichinohe, a root parasite of soybean, glycine max (l.) merr., is the most threatening pathogen in soybean production and soybean aphid, aphis glycines matsumura, an aboveground phloem-feeding insect that appeared in north america in 2000, is the key aboveground herbivore of soybean in the ... | 2011 | 22066186 |
| permanent genetic resources added to molecular ecology resources database 1 june 2011-31 july 2011. | this article documents the addition of 112 microsatellite marker loci and 24 pairs of single nucleotide polymorphism (snp) sequencing primers to the molecular ecology resources database. loci were developed for the following species: agelaius phoeniceus, austrolittorina cincta, circus cyaneus, circus macrourus, circus pygargus, cryptocoryne × purpurea ridl. nothovar. purpurea, mya arenaria, patagioenas squamosa, prochilodus mariae, scylla serrata and scytalopus speluncae. these loci were cross-t ... | 2011 | 21951598 |
| genetic mapping revealed two loci for soybean aphid resistance in pi 567301b. | the soybean aphid (aphis glycines matsumura) is the most damaging insect pest of soybean [glycine max (l.) merr.] in north america. new soybean aphid biotypes have been evolving quickly and at least three confirmed biotypes have been reported in usa. these biotypes are capable of defeating most known aphid resistant soybean genes indicating the need for identification of new genes. plant introduction (pi) 567301b was earlier identified to have antixenosis resistance against biotype 1 and 2 of th ... | 2011 | 21912856 |
| An aphid-dip bioassay to evaluate susceptibility of soybean aphid (Hemiptera: Aphididae) to pyrethroid, organophosphate, and neonicotinoid insecticides. | Since the discovery of the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), in North America in 2000, chemical control has been the most effective method to manage aphid outbreaks. Increased insecticide use in soybean raises the possibility of developing insecticide resistance in soybean aphid, and monitoring insecticide susceptibility is essential to maintain pesticide tools. We developed a simple and reliable aphid-dip bioassay by using a tea strainer that resulted in -90% survi ... | 2011 | 21882704 |
| QTL underlying the resistance to soybean aphid (Aphis glycines Matsumura) through isoflavone-mediated antibiosis in soybean cultivar 'Zhongdou 27'. | Soybean aphid (Aphis glycines Matsumura) results in severe yield loss of soybean in many soybean-growing countries of the world. A few loci have been previously identified to be associated with the aphid resistance in soybean. However, none of them was via isoflavone-mediated antibiosis process. The aim of the present study was to conduct genetic analysis of aphid resistance and to identify quantitative trait loci (QTL) underlying aphid resistance in a Chinese soybean cultivar with high isoflavo ... | 2011 | 21858470 |
| susceptibility of aphelinus certus to foliar-applied insecticides currently or potentially registered for soybean aphid control. | background: soybean aphid, a serious economic pest of soybean in north america, is currently managed by applying non-selective foliar insecticides during outbreaks according to decision thresholds and crop maturity. natural enemies, such as the parasitoid aphelinus certus yasnosh, potentially play an important role in suppressing soybean aphid. using selective insecticides that preserve a. certus may enhance the biological control service they provide and thus prevent or reduce the severity of s ... | 2011 | 21770014 |
| what is the economic threshold of soybean aphids (hemiptera: aphididae) in enemy-free space? | soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is a serious pest of soybean, glycine max (l.) merr., in the north central united states. current management recommendations rely on the application of insecticides based on an economic threshold (et) of 250 aphids per plant. natural enemies are important in slowing the increase of aphid populations and can prevent them from reaching levels that can cause economic losses. however, biological control of a. glycines is inconsistent an ... | 2011 | 21735903 |
| cloning and characterization of mariner-like elements in the soybean aphid, aphis glycines matsumura. | soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is currently the most important insect pest of soybean (glycine max (l.) merr.) in the united states and causes significant economic damage worldwide, but little is known about the aphid at the molecular level. mariner-like transposable elements (mles) are ubiquitous within the genomes of arthropods and various other invertebrates. in this study, we report the cloning of mles from the soybean aphid genome using degenerate pcr primer ... | 2011 | 21729396 |
| permanent genetic resources added to molecular ecology resources database 1 april 2010 - 31 may 2010. | this article documents the addition of 396 microsatellite marker loci to the molecular ecology resources database. loci were developed for the following species: anthocidaris crassispina, aphis glycines, argyrosomus regius, astrocaryum sciophilum, dasypus novemcinctus, delomys sublineatus, dermatemys mawii, fundulus heteroclitus, homalaspis plana, jumellea rossii, khaya senegalensis, mugil cephalus, neoceratitis cyanescens, phalacrocorax aristotelis, phytophthora infestans, piper cordulatum, pte ... | 2010 | 21565124 |
| development of soybean aphid genomic ssr markers using next generation sequencing. | simple sequence repeats (ssrs) or microsatellites are very useful molecular markers, owing to their locus-specific codominant and multiallelic nature, high abundance in the genome, and high rates of transferability across species. the soybean aphid ( aphis glycines matsumura) has become the most damaging insect pest of soybean ( glycine max (l.) merr.) in north america, since it was first found in the midwest of the united states in 2000. biotypes of the soybean aphid capable of colonizing newly ... | 2011 | 21529140 |
| methyl salicylate attracts natural enemies and reduces populations of soybean aphids (hemiptera: aphididae) in soybean agroecosystems. | methyl salicylate, an herbivore-induced plant volatile, has been shown to attract natural enemies and affect herbivore behavior. in this study, methyl salicylate was examined for its attractiveness to natural enemies of the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), and for its direct effects on soybean aphid population growth rates. methyl salicylate lures were deployed in plots within organic soybean [glycine max (l.) merr.] fields. sticky card traps adjacent to and 1.5 m ... | 2011 | 21404848 |
| population growth of soybean aphid, aphis glycines, under varying levels of predator exclusion. | although soybean aphid, aphis glycines matsumura (hemiptera: aphididae), has caused economic damage in several midwestern states, growers in missouri have experienced relatively minor damage. to evaluate whether existing predatory insect populations are capable of suppressing or preventing soybean aphid population growth or establishment in missouri, a predator exclusion study was conducted to gauge the efficacy of predator populations. three levels of predator exclusion were used; one that excl ... | 2010 | 21073344 |
| seasonal phenology of aphis glycines (hemiptera: aphididae) and other aphid species in cultivated bean and noncrop habitats in wisconsin. | the occurrence of aphid-transmitted viruses in agricultural crops of the midwest and northeastern united states has become more frequent since the arrival and establishment of the soybean aphid, aphis glycines matsumura (hemiptera: aphididae). a. glycines is a competent vector of plant viruses and may be responsible for recent virus epidemics in wisconsin snap bean, phaseolus vulgaris l., fields. to determine whether vegetation surrounding crop fields could serve as sources of virus inocula, we ... | 2010 | 21061967 |
| ecology and management of the soybean aphid in north america. | the soybean aphid, aphis glycines matsumura, has become the single most important arthropod pest of soybeans in north america. native to asia, this invasive species was first discovered in north america in july 2000 and has rapidly spread throughout the northcentral united states, much of southeastern canada, and the northeastern united states. in response, important elements of the ecology of the soybean aphid in north america have been elucidated, with economic thresholds, sampling plans, and ... | 2011 | 20868277 |
| development and validation of node-based sample units for estimating soybean aphid (hemiptera: aphididae) densities in field cage experiments. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is currently the most important insect threat to soybean, clycine max (l.) merr., production in the north central united states. field cage studies are a key tool in investigating the potential of natural enemies and host plant resistance to control this pest. however, a major constraint in the use of cage studies is the limited number of treatments and replicates that can be used as aphid densities frequently become so large as ... | 2010 | 20857764 |
| categorizing the resistance of soybean genotypes to the soybean aphid (hemiptera: aphididae). | we evaluated selected soybean, glycine max (l.) merr., genotypes during their reproductive stages for resistance to the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), under greenhouse conditions and documented the categories of aphid-resistant soybean. two screening studies were performed to assess the level of resistance to the soybean aphid on six soybean genotypes during the reproductive stages of development. significant differences in aphid damage ratings were detected amon ... | 2010 | 20857755 |
| combining next-generation sequencing strategies for rapid molecular resource development from an invasive aphid species, aphis glycines. | aphids are one of the most important insect taxa in terms of ecology, evolutionary biology, genetics and genomics, and interactions with endosymbionts. additionally, many aphids are serious pest species of agricultural and horticultural plants. recent genetic and genomic research has expanded molecular resources for many aphid species, including the whole genome sequencing of the pea aphid, acrythosiphon pisum. however, the invasive soybean aphid, aphis glycines, lacks in any significant molecul ... | 2010 | 20614011 |
| choosing organic pesticides over synthetic pesticides may not effectively mitigate environmental risk in soybeans. | selection of pesticides with small ecological footprints is a key factor in developing sustainable agricultural systems. policy guiding the selection of pesticides often emphasizes natural products and organic-certified pesticides to increase sustainability, because of the prevailing public opinion that natural products are uniformly safer, and thus more environmentally friendly, than synthetic chemicals. | 2010 | 20582315 |
| alfalfa mosaic virus: coat protein-dependent initiation of infection. | summary taxonomy: alfalfa mosaic virus (amv) is the type species of the genus alfamovirus and belongs to the family bromoviridae. in this family, the tripartite rna genomes of bromo-, cucumo- and probably oleaviruses are infectious as such, whereas infection with the three genomic rnas of alfamo- and ilarviruses requires addition to the inoculum of a few molecules of coat protein (cp) per rna molecule. rnas 1 and 2 encode the replicase proteins p1 and p2, rna 3 encodes the movement protein and c ... | 2003 | 20569357 |
| detached leaf and whole plant assays for soybean aphid resistance: differential responses among resistance sources and biotypes. | the soybean aphid, aphis glycines matsumura, is a pest of cultivated soybean, glycine max (l.) merr., in north america. recent developments in host plant resistance studies have identified at least four soybean aphid resistance genes (rag1-4) and two soybean aphid biotypes (biotype 1 and 2), defined by differential survivability on resistant soybean. detached soybean leaves were tested as a more rapid and practical assay to assess host plant resistance and virulence. two susceptible lines ('wyan ... | 2010 | 20568642 |
| feeding behavior analysis of the soybean aphid (hemiptera: aphididae) on resistant soybean 'dowling'. | soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is an exotic pest of soybean, glycine max (l.) merr., in north america. plant resistance to the soybean aphid was recently discovered in 'dowling' soybean in 2005. dowling exhibits strong antibiotic effects on the soybean aphid by limiting colonization and effectively controlling aphid population development during all soybean growth stages. in addition, aphids feeding on dowling experienced significantly reduced survival, longevity ... | 2010 | 20568609 |
| habitat affinity of resident natural enemies of the invasive aphis glycines (hemiptera: aphididae), on soybean, with comments on biological control. | we integrated a natural enemy survey of the broader landscape into a more traditional survey for aphis glycines matsumura (hemiptera: aphididae), parasitoids and predatory flies on soybean using a. glycines-infested soybean, glycine max (l.) merr., placed in cropped and noncropped plant systems to complement visual field observations. across three sites and 5 yr, 18 parasitoids and predatory flies in total (hymenoptera: aphelinidae [two species] and bracondae [seven species], diptera: cecidomyii ... | 2010 | 20568602 |
| constitutive and induced differential accumulation of amino acid in leaves of susceptible and resistant soybean plants in response to the soybean aphid (hemiptera: aphididae). | although soybean aphid (aphis glycines) resistance is commercially available in the form of the rag1 gene, the mechanism of this resistance is not fully understood. amino acids are a limiting factor for aphid growth, and there is evidence that plant amino acid composition is related to aphid resistance. antibiotic resistance like that conferred by rag1 could be associated in part with both protein and nonprotein free amino acids reducing survival, growth, and fecundity of the target pest. we pos ... | 2010 | 20550799 |
| genetic diversity and differentiation among laboratory and field populations of the soybean aphid, aphis glycines. | the soybean aphid, aphis glycines matsumura, is a recent invasive pest of soybean in north america. currently, much research is focused on developing and characterizing soybean cultivars expressing host-plant resistance. during the initial phases of host-plant resistance screening, many of these studies use soybean aphid laboratory populations. previous studies in other systems have documented substantial differences among laboratory and field populations. whether or not this pattern exists in a ... | 2010 | 20507673 |
| fine mapping of the soybean aphid-resistance gene rag2 in soybean pi 200538. | the discovery of biotype diversity of soybean aphid (sa: aphis glycines matsumura) in north america emphasizes the necessity to identify new aphid-resistance genes. the soybean [glycine max (l.) merr.] plant introduction (pi) 200538 is a promising source of sa resistance because it shows a high level of resistance to a sa biotype that can overcome the sa-resistance gene rag1 from 'dowling'. the sa-resistance gene rag2 was previously mapped from pi 200538 to a 10-cm marker interval on soybean chr ... | 2010 | 20454773 |
| a new soybean aphid (hemiptera: aphididae) biotype identified. | shortly after its arrival, the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), became established as the most important insect pest of soybean, glycine max l. (merr.), in the northern part of the north american soybean production region. soybean resistance is an environmentally sustainable method to manage the pest and new soybean aphid resistant cultivars are beginning to be deployed into production. however, an earlier study identifying a soybean aphid biotype that could coloni ... | 2010 | 20429468 |
| impact of developmental maturity of soybean on the seasonal abundance of soybean aphid (hemiptera: aphididae). | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), alternates between a primary overwintering host (buckthorn, rhamnus sp.) and a secondary summer host (soybean, glycine max). selection of soybean cultivars with different maturity groups may provide growers with a management tool for a. glycines, either directly through its effect on summer populations that cause economic damage or indirectly through its effect on the production of migrants that disperse to the primary host in f ... | 2010 | 20388278 |
| density-dependent intraguild predation of an aphid parasitoid. | a growing body of research has examined the effect of shared resource density on intraguild predation (igp) over relatively short time frames. most of this work has led to the conclusion that when the shared resource density is high, the strength of igp should be lower, due to prey dilution. however, experiments addressing this topic have been done using micro- or mesocosms that excluded the possibility of intraguild predator aggregation. we examined the effect of shared resource density on igp ... | 2010 | 20369258 |
| 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 |
| potential of suction traps as a monitoring tool for aphis glycines (hemiptera: aphididae) in soybean fields. | the current study evaluated the potential of using counts of winged adults captured in suction traps to forecast the local abundance of soybean aphid, aphis glycines matsumura (hemiptera: aphididae), in soybean, glycine max (l.) merr., fields. the abundance of aphids was evaluated weekly by sampling plants in four to 11 soybean fields and recording the number of aphids in suction traps between 2006 and 2008 in four counties in indiana and illinois. fields in each county were located within 10 km ... | 2010 | 20214385 |
| modeling distribution and abundance of soybean aphid in soybean fields using measurements from the surrounding landscape. | soybean aphid (aphis glycines matsumura) is a severe pest of soybean in central north america. outbreaks of the aphid in ontario are often spotty in distribution, with some geographical areas affected severely and others with few or no aphid populations occurring in soybean for the duration of the season. a. glycines spend summers on soybean and overwinter on buckthorn, a shrub that is widespread in southern ontario and is commonly found in agricultural hedgerows and at the margins of woodlots. ... | 2010 | 20146839 |
| relationship of soybean aphid (hemiptera: aphididae) to soybean plant nutrients, landscape structure, and natural enemies. | in the north central united states, populations of the exotic soybean aphid, aphis glycines matsumura (hemiptera: aphididae), are highly variable across space, complicating effective aphid management. in this study we examined relationships of plant nutrients, landscape structure, and natural enemies with soybean aphid abundance across iowa, michigan, minnesota, and wisconsin, representing the range of conditions where soybean aphid outbreaks have occurred since its introduction. we sampled soyb ... | 2010 | 20146837 |
| impact of elevated levels of atmospheric co2 and herbivory on flavonoids of soybean (glycine max linnaeus). | atmospheric levels of carbon dioxide (co2) have been increasing steadily over the last century. plants grown under elevated co2 conditions experience physiological changes, particularly in phytochemical content, that can influence their suitability as food for insects. flavonoids are important plant defense compounds and antioxidants that can have a large effect on leaf palatability and herbivore longevity. in this study, flavonoid content was examined in foliage of soybean (glycine max linnaeus ... | 2010 | 20077130 |
| returns to integrated pest management research and outreach for soybean aphid. | soybean aphid, aphis glycines matsumura, is a major invasive pest that has caused substantial yield loss and increased insecticide use in the united states since its discovery in 2000. using the economic surplus approach, we estimate the economic benefits of u.s. research and outreach for integrated pest management (ipm) of soybean aphid. we calculate ex ante net benefits from adoption of an ipm economic threshold (et). the et triggers insecticide application only if the value of predicted yield ... | 2009 | 20069840 |
| probability of cost-effective management of soybean aphid (hemiptera: aphididae) in north america. | soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is one of the most damaging pests of soybean, glycine max (l.) merrill, in the midwestern united states and canada. we compared three soybean aphid management techniques in three midwestern states (iowa, michigan, and minnesota) for a 3-yr period (2005-2007). management techniques included an untreated control, an insecticidal seed treatment, an insecticide fungicide tank-mix applied at flowering (i.e., a prophylactic treatment), an ... | 2009 | 20069838 |
| a novel locus for soybean aphid resistance. | the soybean aphid (aphis glycines matsumura) is an important pest on soybean [glycine max (l.) merr.] in north america. aphid resistance has recently been found on plant introduction (pi) 567543c, but little is known about its genetic control. the objectives of this study were to identify the resistance genes in pi 567543c with molecular markers and validate them in a different genetic background. a mapping population of 249 f(4) derived lines from a cross between pi 567543c and a susceptible pa ... | 2010 | 20049413 |
| fine mapping the soybean aphid resistance gene rag1 in soybean. | the soybean aphid (aphis glycines matsumura) is an important soybean [glycine max (l.) merr.] pest in north america. the dominant aphid resistance gene rag1 was previously mapped from the cultivar 'dowling' to a 12 cm marker interval on soybean chromosome 7 (formerly linkage group m). the development of additional genetic markers mapping closer to rag1 was needed to accurately position the gene to improve the effectiveness of marker-assisted selection (mas) and to eventually clone it. the object ... | 2010 | 20035316 |
| non-target impacts of soybean rust fungicides on the fungal entomopathogens of soybean aphid. | soybean aphid, aphis glycines, has caused serious economic damage to soybean across the north central us since its introduction to north america in 2000. the management of another invasive soybean pest, asian soybean rust, phakopsora pachyrhizi, using foliar fungicide applications has the potential to impact soybean aphid populations by suppressing beneficial fungal entomopathogens. in 2005 and 2006, we applied recommended soybean rust fungicide treatments, consisting of strobilurin and triazole ... | 2010 | 20025884 |
| changes in digestive rate of a predatory beetle over its larval stage: implications for dietary breadth. | prey and non-prey foods differ substantially in their suitability for zoophytophagous omnivores, but the relative quality of these foods depends on the stage-specific digestive capabilities of the organism in question. quantitative (or real-time) pcr was used to amplify food-specific dna and measure consumption rates and digestion efficiencies of four foods - two prey (aphis glycines and leptinotarsa decemlineata eggs) and two non-prey (zea mays pollen and the yeast saccharomyces cerevisiae) spe ... | 2010 | 19951709 |
| impact of reduced-risk insecticides on soybean aphid and associated natural enemies. | insect predators in north america suppress aphis glycines matsumura (hemiptera: aphididae) populations; however, insecticides are required when populations reach economically damaging levels. currently, insecticides used to manage a. glycines are broad-spectrum (pyrethroids and organophosphates), and probably reduce beneficial insect abundance in soybean, glycine max (l.) merr. our goal was to determine whether insecticides considered reduced-risk by the environmental protection agency could pro ... | 2009 | 19886446 |
| modeling temporal trends in aphid vector dispersal and cucumber mosaic virus epidemics in snap bean. | cucumber mosaic virus (cmv) has become a major limiting factor in snap bean production in the great lakes region of north america, and epidemics have occurred more frequently since the soybean aphid, aphis glycines matsumura, was introduced. major aphid vectors of cmv epidemics were identified by statistically relating their temporal dispersal trends to the incidence of cmv. alates were monitored weekly using water pan traps in 74 snap bean fields in new york and pennsylvania from 2002 to 2006. ... | 2009 | 19825288 |
| two species of symbiotic bacteria present in the soybean aphid (hemiptera: aphididae). | aphids, which feed solely on plant phloem sap, have developed symbiotic associations with bacteria that provide them with the amino acids that are lacking in phloem. three soybean aphid (aphis glycines mat samura) populations were screened for the presence of buchnera aphidicola and three common species of secondary aphid symbionts (serratia symbiotica, hamiltonella defensa, and regiella insecticola). diagnostic polymerase chain reaction and subsequent dna sequencing showed the presence of two s ... | 2009 | 19791603 |
| population genetic structure of aphis glycines. | the soybean aphid (aphis glycines matsumura) is an invasive pest of cultivated soybean (glycine max l.) in north america. after the initial invasion in 2000, the aphid has quickly spread across most of the united states and canada, suggesting large-scale dispersal and rapid adaptation to new environments. using microsatellite markers from closely related species, we compared the genetic diversity and the amount of genetic differentiation within and among 2 south korean and 10 north american popu ... | 2009 | 19689913 |
| cross-species amplification and polymorphism of microsatellite loci in the soybean aphid, aphis glycines. | we tested the utility of 18 previously characterized aphis spp. microsatellite loci for polymorphism and differentiation among populations of the soybean aphid, aphis glycines. loci were chosen from a closely related species (aphis gossypii) and a more distantly related species (aphis fabae). we found nine loci to be polymorphic among korean and north american populations. overall expected heterozygosity was moderate (average: 0.47; range: 0-1), although populations substantially differed in dev ... | 2009 | 19610462 |
| predation by coccinella septempunctata and harmonia axyridis (coleoptera: coccinellidae) on aphis glycines (homoptera: aphididae). | coccinella septempunctata l. and harmonia axyridis pallas are key natural enemies of soybean aphid, aphis glycines matsumura, in north america. third instars, adult females, and adult males of both c. septempunctata and h. axyridis exhibited a type ii functional response for predation toward adult soybean aphids at 26 +/- 1 degrees c. in c. septempunctata, the functional response curve of adult males differed from those of third instars and adult females, but there was no difference between thir ... | 2009 | 19508779 |
| landscape diversity enhances biological control of an introduced crop pest in the north-central usa. | arthropod predators and parasitoids provide valuable ecosystem services in agricultural crops by suppressing populations of insect herbivores. many natural enemies are influenced by non-crop habitat surrounding agricultural fields, and understanding if, and at what scales, land use patterns influence natural enemies is essential to predicting how landscape alters biological control services. here we focus on biological control of soybean aphid, aphis glycines matumura, a specialist crop pest rec ... | 2009 | 19323179 |
| efficacy of neonicotinoid seed treatments to reduce soybean aphid populations under field and controlled conditions in nebraska. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is native to asia and was recently (2000) detected in north america. since then, it has become a significant threat to u.s. soybean production. although neonicotinoid insecticide seed treatments, imidacloprid and thiamethoxam, have been suggested as a method of control, the season-long efficacy is still uncertain. therefore, the use of imidacloprid and thiamethoxam seed treatments to control soybean aphid in nebraska were examin ... | 2009 | 19253636 |
| trade-offs between flight and fecundity in the soybean aphid (hemiptera: aphididae). | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is native to eastern asia and was accidentally introduced into north america in 2000. within a few years, it was found throughout the u.s. and canadian soybean-growing regions. the spread of a. glycines in north america is partly ascribed to its great flight capacity. we conducted direct measurements of flight performance of winged a. glycines adults and correlated this to their subsequent longevity and fecundity to determine wh ... | 2009 | 19253628 |
| transient host paralysis as a means of reducing self-superparasitism in koinobiont endoparasitoids. | the term 'idiobiont' refers to those parasitoid species that permanently paralyse their hosts during parasitism, causing the cessation of host growth and development. this is in contrast to koinobiont parasitoids, which allow their hosts to continue developing after being parasitized. while no koinobiont species induce permanent paralysis in their hosts, a minority of koinobionts induce a temporary paralysis that does not interfere with overall host growth and development. we characterized trans ... | 2009 | 19162033 |
| increasing corn for biofuel production reduces biocontrol services in agricultural landscapes. | increased demand for corn grain as an ethanol feedstock is altering u.s. agricultural landscapes and the ecosystem services they provide. from 2006 to 2007, corn acreage increased 19% nationally, resulting in reduced crop diversity in many areas. biological control of insects is an ecosystem service that is strongly influenced by local landscape structure. here, we estimate the value of natural biological control of the soybean aphid, a major pest in agricultural landscapes, and the economic imp ... | 2008 | 19075234 |
| effect of ant attendance by monomorium minimum (buckley) (hymenoptera: formicidae) on predation and parasitism of the soybean aphid aphis glycines matsumura (hemiptera: aphididae). | ant attendance is known to affect the population dynamics of aphids and may increase or decrease aphid populations through stimulation, predation, or protection. in this study, we performed a series of laboratory experiments to examine the effects of ant attendance on populations of the soybean aphid aphis glycines. aphid colonies were exposed to the predators harmonia axyridis (coccinellidae) and orius insidiosus (anthocoridae) and a parasitoid aphidius colemani (aphidiidae) in the presence and ... | 2008 | 19036205 |
| molecular mapping of soybean aphid resistance genes in pi 567541b. | the soybean aphid (aphis glycines matsumura) is an important pest of soybean [glycine max (l.) merr.] in north america since it was first reported in 2000. pi 567541b is a newly discovered aphid resistance germplasm with early maturity characteristics. the objectives of this study were to map and validate the aphid resistance genes in pi 567541b using molecular markers. a mapping population of 228 f3 derived lines was investigated for the aphid resistance in both field and greenhouse trials. two ... | 2009 | 18982306 |
| 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 |
| potential of an alternative prey to disrupt predation of the generalist predator, orius insidiosus, on the pest aphid, aphis glycines, via short-term indirect interactions. | generalist insect predators can significantly impact the dynamics of pest populations; and, using alternative prey, they can rapidly establish in disturbed agroecosystems. however, indirect interactions between prey can occur, leading to either increased or decreased predation on focal prey. the present paper demonstrates how alternative prey can disrupt predation by the hemipteran orius insidiosus on the soybean aphid aphis glycines via short-term indirect interactions. we used laboratory micro ... | 2008 | 18845007 |
| role of visual and olfactory cues from agricultural hedgerows in the orientation behavior of multicolored asian lady beetle (coleoptera: coccinellidae). | harmonia axyridis pallas is an introduced lady beetle common in eastern north american agroecosystems. two-choice behavioral bioassays were performed to determine whether visual and olfactory stimuli from prey and host habitats could elicit taxis in wild-collected h. axyridis adults and whether beetles exhibit a preference among stimuli. soybean aphid (aphis glycines matsumura) spends much of the year in agricultural hedgerows residing on buckthorn (rhamnus cathartica l), and h. axyridis is freq ... | 2008 | 18801263 |
| voracity and prey preference of insidious flower bug (hemiptera: anthocoridae) for immature stages of soybean aphid (hemiptera: aphididae) and soybean thrips (thysanoptera: thripidae). | the generalist predator, orius insidiosus (say), is an important natural enemy of the soybean aphid, aphis glycines matsumura. soybean thrips, neohydatothrips variabilis (beach), serve as an important prey resource for o. insidiosus in soybeans, sustaining the predator's population before the arrival of the soybean aphid. although generalist predators can forage on a broad range of prey, they may show distinct preferences for particular prey, attacking prey at levels disproportionate to their re ... | 2008 | 18801262 |
| within-plant distribution of soybean aphid (hemiptera: aphididae) and development of node-based sample units for estimating whole-plant densities in soybean. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is capable of reducing soybean, glycine max (l.) merr., yield up to 40% during severe outbreaks. frequent sampling, which can be costly and time-consuming, is essential to making informed management decisions. however, one way to decrease sampling effort is to use a reduced sample unit when possible. the objectives of this study were to describe the vertical distribution of soybean aphid within soybean over time and to define no ... | 2008 | 18767764 |
| 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 |
| genetic linkage mapping of the soybean aphid resistance gene in pi 243540. | the soybean aphid (aphis glycines matsumura) is a pest of soybean [glycine max (l.) merr.] in many soybean growing countries of the world, mainly in asia and north america. a single dominant gene in pi 243540 confers resistance to the soybean aphid. the objectives of this study were to identify simple sequence repeat (ssr) markers closely linked to the gene in pi 243540 and to position the gene on the consensus soybean genetic map. one hundred eighty-four f2 plants and their f2:3 families from a ... | 2008 | 18626623 |
| is preventative, concurrent management of the soybean aphid (hemiptera: aphididae) and bean leaf beetle (coleoptera: chrysomelidae) possible? | in iowa, the management of insect pests in soybean, glycine max (l.) merr., has been complicated by the arrival of the invasive species soybean aphid, aphis glycines matsumura (hemiptera: aphididae), and occasional outbreaks of bean leaf beetle, cerotoma trifurcata (förster) (coleoptera: chrysomelidae), populations leading to economic losses. several insecticide programs designed to reduce abundance of the overwintered and first generation c. trifurcata and the incidence of bean pod mottle virus ... | 2008 | 18613581 |
| efficacy and nontarget effects of reduced-risk insecticides on aphis glycines (hemiptera: aphididae) and its biological control agent harmonia axyridis (coleoptera: coccinellidae). | the efficacy of three reduced-risk insecticides (pyrethrins, insecticidal soap, and narrow-range mineral oil) was determined for nymphs and adults of the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), an exotic pest of north american soybean, glycine max (l.) merr. these insecticides also were evaluated for nontarget effects on one of the aphid's key biological control agents, multicolored asian lady beetle, harmonia axyridis (pallas) (coleoptera: coccinellidae), including first ... | 2008 | 18459403 |
| seasonal abundance of resident parasitoids and predatory flies and corresponding soybean aphid densities, with comments on classical biological control of soybean aphid in the midwest. | seasonal abundance of resident parasitoids and predatory flies, and corresponding soybean aphid, aphis glycines matsumura (hemiptera: aphididae), densities were assessed in soybean fields from 2003 to 2006 at two locations in lower michigan. six parasitoid and nine predatory fly species were detected in 4 yr by using potted plants infested with soybean aphid placed in soybean fields. the parasitoid lysiphlebus testaceipes cresson (hymenoptera: braconidae) and the predatory flies aphidoletes aphi ... | 2008 | 18459389 |
| soybean defense responses to the soybean aphid. | transcript profiles in aphid (aphis glycines)-resistant (cv. dowling) and -susceptible (cv. williams 82) soybean (glycine max) cultivars using soybean cdna microarrays were investigated. large-scale soybean cdna microarrays representing approx. 18 000 genes or c. 30% of the soybean genome were compared at 6 and 12 h post-application of aphids. in a separate experiment utilizing clip cages, expression of three defense-related genes were examined at 6, 12, 24, 48, and 72 h in both cultivars by qua ... | 2008 | 18422900 |
| flight performance of the soybean aphid, aphis glycines (hemiptera: aphididae) under different temperature and humidity regimens. | the soybean aphid, aphis glycines (matsumura), is native to eastern asia and has recently invaded north america, where it is currently the most important insect pest of soybeans. the soybean aphid has spread rapidly within north america, presumably through a combination of active and passive (wind-aided) flight. here, we studied the active flight potential of a. glycines under a range of environmental conditions using an aphid flight mill. winged (alate) a. glycines were tested on a specially de ... | 2008 | 18419900 |
| parasitism of the soybean aphid, aphis glycines by binodoxys communis: the role of aphid defensive behaviour and parasitoid reproductive performance. | the asian parasitoid, binodoxys communis (gahan) (hymenoptera: braconidae), is a candidate for release against the exotic soybean aphid, aphis glycines matsumura (hemiptera: aphididae), in north america. in this study, we examined preferences by b. communis for the different developmental stages of a. glycines and investigated consequences of these preferences for parasitoid fitness. we also determined to what extent aphid defensive behaviours mediate such preferences. we found that b. communis ... | 2008 | 18294416 |