| bionomics of scymnus (pullus) louisianae j. chapin (coleoptera: coccinellidae) as a predator of the soybean aphid, aphis glycines matsumura (homoptera: aphididae). | a field population of scymnus louisianae chapin (coccinellidae) was found attacking soybean aphids, apis glycines matsumura (aphidae), a pest recently introduced into kentucky. this coccinellid had not previously been found in kentucky. a greenhouse population of s. louisianae was established and its predation on a. glycines studied under laboratory conditions. total time to develop from egg to adult was about 20 d. about 70% of immatures survived to adulthood and they consumed approximately 100 ... | 2003 | 12650339 |
| photosynthetic responses of soybean to soybean aphid (homoptera: aphididae) injury. | the soybean aphid, aphis glycines matsumara, was discovered in the united states in the summer of 2000. since that initial discovery, the aphid has spread across northern soybean production regions. in 2001, we examined the physiological responses of soybeans to low aphids densities (fewer than 50 aphids/leaf). in this study, we determined photosynthetic rates, leaf fluorescence responses, and photosynthetic responses to variable carbon dioxide and light levels. in addition, analyses for chlorop ... | 2003 | 12650361 |
| variability and transmission by aphis glycines of north american and asian soybean mosaic virus isolates. | the variability of north american and asian strains and isolates of soybean mosaic virus was investigated. first, polymerase chain reaction (pcr) products representing the coat protein (cp)-coding regions of 38 smvs were analyzed for restriction fragment length polymorphisms (rflp). second, the nucleotide and predicted amino acid sequence variability of the p1-coding region of 18 smvs and the helper component/protease (hc/pro) and cp-coding regions of 25 smvs were assessed. the cp nucleotide and ... | 2003 | 14551816 |
| comparing greenhouse sprayers: the dose-transfer process. | three sprayers were evaluated for their affect on retention and efficacy: a carbon dioxide powered high-volume sprayer, a dramm coldfogger, and an electrostatic spraying systems (ess) sprayer with air-assistance. the active ingredients used were spinosad and azadirachtin. the plant canopy was constructed in the greenhouse using potted soybeans (glycine max (l) merrill cr pioneer 9392). application efficacy with spinosad was assessed using thrips [western flower thrips, frankliniella occidentalis ... | 2004 | 15154520 |
| demography of soybean aphid (homoptera: aphididae) at summer temperatures. | soybean aphid, aphis glycines matsumura, is now widely established in soybean, glycine max l., production areas of the northern united states and southern canada and is becoming an important economic pest. temperature effect on soybean aphid fecundity and survivorship is not well understood. we determined the optimal temperature for soybean aphid growth and reproduction on soybean under controlled conditions. we constructed life tables for soybean aphid at 20, 25, 30, and 35 degrees c with a pho ... | 2004 | 15279264 |
| resistance of glycine species and various cultivated legumes to the soybean aphid (homoptera: aphididae). | the soybean aphid, aphis glycines matsumura, is a new pest of soybean, glycine max (l.) merr., in north america. it has become widespread on soybean in north america since it was first identified in the midwest in 2000. species of rhamnus l. (buckthorn) are the primary hosts of a. glycines, and soybean is known as a secondary host. there is limited information about the secondary host range of a. glycines. aphid colonization on various legume hosts was compared in choice experiments. aphid colon ... | 2004 | 15279293 |
| effect of three resistant soybean genotypes on the fecundity, mortality, and maturation of soybean aphid (homoptera: aphididae). | the fecundity, longevity, mortality, and maturation of the soybean aphid, aphis glycines matsumura (homoptera: aphididae), were characterized using three resistant soybean, glycine max (l.) merrill, genotypes ('dowling', 'jackson', and pi200538 'sugao zarai') and two susceptible genotypes ('pana' and 'loda'). antibiosis in the resistant genotypes was demonstrated by a significant decrease in fecundity and longevity and increased mortality of a. glycines. aphid fecundity, measured as number of of ... | 2004 | 15279297 |
| enumerative and binomial sequential sampling plans for soybean aphid (homoptera: aphididae) in soybean. | since the discovery of the soybean aphid, aphis glycines matsumura, in midwestern u.s. soybean, glycine max l., in 2000, the aphid has become a significant economic pest. basic information about estimating population density within fields is unknown. therefore, we developed two sampling plans to efficiently characterize a. glycines densities. enumerative and binomial sequential plans were developed using 89 data sets collected from 10 commercial fields sampled during 2001-2003. re-sampling softw ... | 2004 | 15666774 |
| effect of soil potassium availability on soybean aphid (hemiptera: aphididae) population dynamics and soybean yield. | studies were conducted to examine the effect of potassium (k) on soybean aphid, aphis glycines matsumura, population growth. a laboratory feeding assay examined the effect of k-deficient foliage on life table parameters of soybean aphids, and field experiments were designed to determine the effect of three soil k treatment levels on aphid populations and their impact on soybean yields. the feeding assay found that life table parameters differed between aphids feeding on the k-deficient and nonde ... | 2005 | 15765672 |
| forecasting seasonal population growth of aphis glycines (hemiptera: aphididae) in soybean in illinois. | from 2001 to 2004, 252 fifty-plant samples were collected from commercial soybean, glycine max l., fields in three townships (93-km2 area) in illinois. townships were sampled every 3 wk from late june or early july when aphids (aphis glycines matsumura) first invaded the townships to early august. we used linear regression of 18 mean township field densities to calibrate several simple models to predict the change in aphid population density in a township from one sampling date to the next. the ... | 2005 | 16156566 |
| methyl salicylate, a soybean aphid-induced plant volatile attractive to the predator coccinella septempunctata. | induced volatiles provide a signal to foraging predatory insects about the location of their prey. in iowa, early in the growing season of soybean, glycine max, many predacious seven-spotted lady beetles, coccinella septempunctata, were observed on plants with heavy infestations of soybean aphid, aphis glycines. we studied whether the attraction of this beetle is caused by the release of specific volatile compounds of soybean plants infested by aphids. volatile compounds emitted by soybean plant ... | 2005 | 16222805 |
| changes in delta 13c stable isotopes in multiple tissues of insect predators fed isotopically distinct prey. | traditionally, researchers have used measurements of carbon stable isotopes to infer the composition of consumers' diets. however, since consumer's tissues may process carbon isotopes differently, particularly following a diet shift, it is possible to use measurements of carbon isotopes in multiple tissues to determine not only the composition of an individual's diet, but also the temporal dynamics thereof. this study examined how stable isotopes of carbon (13c/12c, expressed as delta 13c) chang ... | 2006 | 16341886 |
| determining the optimal timing of foliar insecticide applications for control of soybean aphid (hemiptera: aphididae) on soybean. | field experiments were performed over 3 yr to examine the impact of insecticide application timing to control soybean aphid, aphis glycines matsumura (hemiptera: aphididae), populations and to prevent soybean yield losses. experiments were conducted in early and late-planted soybean, glycine max (l.) merr. insecticide applications were made based on soybean growth stages. in 2001, applications were made at v1, v3, r2, and r3 growth stages; in 2002 and 2003, applications were made at r2, r3, and ... | 2005 | 16539126 |
| soybean plant stage and population growth of soybean aphid. | the soybean aphid, aphis glycines matsumura, is a newly invasive species of aphid in north america. previous studies disagree as to whether soybean, glycine max (l.) merr., plant stage has an impact on aphid intrinsic rate of increase. therefore, the growth rate of soybean aphids on soybean plants of different stages was examined at two different scales in the field. a planting date experiment was used to measure the population growth of soybean aphids on plants of different stages. clip-cages w ... | 2006 | 16573324 |
| toxicity of indoxacarb and spinosad to the multicolored asian lady beetle, harmonia axyridis (coleoptera: coccinellidae), via three routes of exposure. | the use of selective insecticides may improve conservation of natural enemies and therefore contribute to the success of integrated pest management (ipm) programs. in this study, the toxicity of two commonly used selective insecticides, indoxacarb and spinosad, to the multicolored asian lady beetle, harmonia axyridis (pallas), was evaluated. third instars and adults of h. axyridis were exposed to indoxacarb at 50 and 100% of the field rate (fr), to spinosad at 100% fr and to water (untreated che ... | 2006 | 16794989 |
| predators exert top-down control of soybean aphid across a gradient of agricultural management systems. | the discovery of soybean aphid, aphis glycines matusumura, in north america in 2000 provided the opportunity to investigate the relative strength of top-down and bottom-up forces in regulating populations of this new invasive herbivore. at the kellogg biological station long term ecological research site in agroecology, we contrasted a. glycines establishment and population growth under three agricultural production systems that differed markedly in disturbance and fertility regimes. agricultura ... | 2006 | 16937822 |
| characterization of antibiosis and antixenosis to the soybean aphid (hemiptera: aphididae) in several soybean genotypes. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is an introduced pest of soybean, glycine max (l.) merr., in north america, and it can reduce yields by 50%. since 2000, when a. glycines was first detected in the united states, studies of this insect and possible control methods have been initiated. plant resistance to this aphid species is one important component of integrated control. reproduction of a. glycines was compared on 240 soybean entries in a pesticide-free greenho ... | 2006 | 17066826 |
| soil potassium deficiency affects soybean phloem nitrogen and soybean aphid populations. | the soybean aphid is an invasive pest in the midwest united states, with frequent population outbreaks. previous work has shown that aphid population densities are higher on potassium-deficient soybean than on healthy soybean. the experiments reported here test the hypotheses that the potassium nutrition of the host plant affects the forms of phloem nitrogen available to soybean aphids, and subsequently, their abundance. in field surveys and an exclusion cage study when aphid populations were hi ... | 2007 | 17349112 |
| alfalfa living mulch advances biological control of soybean aphid. | despite evidence for biological control in north america, outbreaks of the invasive soybean aphid, aphis glycines matsumura (hemiptera: aphididae), continue to occur on soybean (glycine max l. merr.). our objectives were to determine whether natural enemies delay aphid establishment and limit subsequent population growth and whether biological control can be improved by altering the within-field habitat. we hypothesized that a living mulch would increase the abundance of the aphidophagous commun ... | 2007 | 17445377 |
| suppression of soybean aphid by generalist predators results in a trophic cascade in soybeans. | top-down regulation of herbivores in terrestrial ecosystems is pervasive and can lead to trophic cascades that release plants from herbivory. due to their relatively simplified food webs, agroecosystems may be particularly prone to trophic cascades, a rationale that underlies biological control. however, theoretical and empirical studies show that, within multiple enemy assemblages, intraguild predation (igp) may lead to a disruption of top-down control by predators. we conducted a factorial fie ... | 2007 | 17489251 |
| decline of soybean aphid (homoptera: aphididae) egg populations from autumn to spring on the primary host, rhamnus cathartica. | soybean aphid, aphis glycines matsumura (homoptera: aphididae), is a severe pest of soybeans in north america. soybean aphid populations cycle between a secondary summer host, where populations reproduce parthenogenetically and a primary host, where populations overwinter as eggs. in north america, the secondary host is soybean, and the primary hosts are rhamnus cathartica l. (rhamnaceae) and r. alnifolia l'her. a location with abundant populations of soybean aphid on r. cathartica was identifie ... | 2007 | 17540062 |
| feeding behavior by the soybean aphid (hemiptera: aphididae) on resistant and susceptible soybean genotypes. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is a major pest of soybean, glycine max (l.) merr. since 2000, when a. glycines was detected in the united states, several studies on this insect have been done in different areas, but there is no report of any studies of stylet penetration behavior by a. glycines on resistant and susceptible soybean. assessment of feeding behavior of this aphid species was compared on four resistant entries (k1639, pioneer 95b97, dowling, and j ... | 2007 | 17598565 |
| molecular phylogenetics and reproductive incompatibility in a complex of cryptic species of aphid parasitoids. | we infer the phylogeny of a complex of cryptic species and populations of parasitic wasps and examine how reproductive incompatibility maps onto the molecular phylogeny. we used four nuclear (28s-d2, its1, its2, argk) and two mitochondrial (coi, coii) gene regions to analyze relationships among populations in the aphelinus varipes species complex (hymenoptera: aphelinidae) from throughout eurasia (france, georgia, israel, china, korea and japan) and from three aphid hosts (aphis glycines, diurap ... | 2007 | 17702609 |
| population dynamics of aphis glycines (homoptera: aphididae) and impact of natural enemies in northern china. | field surveys of soybean aphid, aphis glycines matsumura, and its natural enemies, as well as natural enemy exclosure experiments, were conducted during 2003 and 2004 in soybean fields near langfang, china. in 2003, aphid density increased six-fold during 12 d in july from 66+/-12 per 10 plants to a seasonal peak of 401+/-79 per 10 plants. aphid density remained high for another 10 d and declined during late july and early august. in 2004, aphid density increased 29-fold during 13 d in july from ... | 2007 | 17716474 |
| antagonistic effects of soybean viruses on soybean aphid performance. | although there is long-standing recognition that pest complexes require different management approaches than individual pests, relatively little research has explored how pests interact. in particular, little is known of how herbivorous insects and plant pathogens interact when sharing the same host plant. the soybean aphid, aphis glycines mastumura, a recently introduced pest of soybean in the upper midwestern united states, and a complex of plant viruses vectored to soybean by insects have bec ... | 2007 | 17716484 |
| tracking the role of alternative prey in soybean aphid predation by orius insidiosus: a molecular approach. | the soybean aphid, aphis glycines (hemiptera: aphididae), is a pest of soybeans in asia, and in recent years has caused extensive damage to soybeans in north america. within these agroecosystems, generalist predators form an important component of the assemblage of natural enemies, and can exert significant pressure on prey populations. these food webs are complex and molecular gut-content analyses offer nondisruptive approaches for examining trophic linkages in the field. we describe the develo ... | 2007 | 17784913 |
| economic threshold for soybean aphid (hemiptera: aphididae). | soybean aphid, aphis glycines matsumura (hemiptera: aphididae), reached damaging levels in 2003 and 2005 in soybean, glycine max (l.) merrill, in most northern u.s. states and canadian provinces, and it has become one of the most important pests of soybean throughout the north central region. a common experimental protocol was adopted by participants in six states who provided data from 19 yield-loss experiments conducted over a 3-yr period. population doubling times for field populations of soy ... | 2007 | 17849878 |
| population dynamics of soybean aphid and biotic mortality at the edge of its range. | the soybean aphid, aphis glycines matsumura, was introduced to north central north america from asia in 2000, and it has become a major pest of soybean, glycine max (l.) merr. understanding how natural enemies impact aphid populations in the field is an important component in developing a comprehensive management plan. we examined the impact of naturally occurring predators in the field by using exclusion cages during july-august 2004 and 2005. field cages of different mesh diameters were used t ... | 2007 | 17849879 |
| resistance to aphis glycines (hemiptera: aphididae) in various soybean lines under controlled laboratory conditions. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), a pest of soybean, glycine max (l.) merr., native to asia, has recently become a principal pest of this crop in many areas of north america. insecticides are currently used to manage a. glycines, but host plant resistance is a potential alternative management tool. tests were conducted to determine resistance to a. glycines among soybean lines. 'cobb,' 'tie-feng 8,' and 'jackson' were resistant to population growth of a. glycine ... | 2007 | 17849903 |
| chlorophyll loss caused by soybean aphid (hemiptera: aphididae) feeding on soybean. | the soybean aphid, aphis glycines matsumura (hemiptera: aphididae), is a worldwide pest of soybean, glycine max (l.) merr. studies to find control methods were initiated in 2000 when it was first detected in north america. a. glycines can reduce yields by as much as 50%, and it is the vector of several viral diseases. a. glycines removes phloem sap, which can result in a reduction of chlorophyll content. quantification of chlorophyll loss caused by a. glycines feeding on soybean is of vital impo ... | 2007 | 17972645 |
| ssr marker diversity of soybean aphid resistance sources in north america. | the soybean aphid (aphis glycines matsumura) has become a major pest of soybean in north america since 2000. seven aphid resistance sources, pi 71506, dowling, jackson, pi 567541b, pi 567598b, pi 567543c, and pi 567597c, have been identified. knowledge of genetic relationships among these sources and their ancestral parents will help breeders develop new cultivars with different resistance genes. the objective of this research was to examine the genetic relationships among these resistance sourc ... | 2007 | 18059538 |
| sugar feeding by the aphid parasitoid binodoxys communis: how does honeydew compare with other sugar sources? | parasitoids commonly forage in agricultural settings where the predominant sugar source is homopteran honeydew. the aphidiine braconid, binodoxys communis, is an asian parasitoid currently being released against the soybean aphid, aphis glycines, in north american soybean fields. we conducted a number of laboratory experiments evaluating the quality of a. glycines honeydew as a sugar source for this parasitoid. wasps readily fed on droplets of a. glycines honeydew, honey and 50% sucrose solution ... | 2008 | 18190926 |
| insect growth regulator effects of azadirachtin and neem oil on survivorship, development and fecundity of aphis glycines (homoptera: aphididae) and its predator, harmonia axyridis (coleoptera: coccinellidae). | aphis glycines matsumura, an invasive insect pest in north american soybeans, is fed upon by a key biological control agent, harmonia axyridis pallas. although biological control is preferentially relied upon to suppress insect pests in organic agriculture, approved insecticides, such as neem, are periodically utilized to reduce damaging pest populations. the authors evaluated direct spray treatments of two neem formulations, azadirachtin and neem seed oil, under controlled conditions for effect ... | 2008 | 18247318 |
| development of soybean aphid (homoptera: aphididae) on its primary overwintering host, rhamnus cathartica. | thermally dependent development of soybean aphid (aphis glycines matsumura) and common buckthorn (rhamnus cathartica l.) were examined in growth chambers in spring 2005. models based on ambient air temperatures for all development events were developed. adjusted models were developed to account for heat units acquired because of solar radiation. these models were tested at field sites in guelph and ridgetown, ontario, canada. it was found that egg hatch of aphids and bud swell of buckthorn coinc ... | 2007 | 18284720 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |