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 ...200717784913
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 ...200818845007
epidemiology of soybean vein necrosis-associated virus.soybean vein necrosis-associated virus has been linked to an emerging soybean disease in the united states and canada. virus distribution and population structure in major growing areas were evaluated. data were employed to design and develop sensitive detection protocols, able to detect all virus isolates available in databases. the host range for the virus was assessed and several species were found to sustain virus replication, including ivyleaf morning glory, a common weed species in soybean ...201323550970
within-plant distribution and dynamics of thrips species (thysanoptera: thripidae) in cotton.a 2-yr study in cotton (gossypium hirsutum l.) was conducted to determine the abundance and species composition of thrips (thysanoptera: thripidae) on different plant parts throughout the season in alabama, georgia, north carolina, south carolina, and virginia. plant parts sampled included seedlings, terminals with two expanded leaves, leaves from the upper, middle, and lower sections of the canopy, white flowers, and medium-sized bolls. adult thrips were significantly more abundant on seedlings ...201728475718
impact of neonicotinoid seed treatments on thrips (thysanoptera: thripidae) and soybean yield in virginia and north carolina.currently there are several neonicotinoid insecticide seed treatments registered for use on soybean (glycine max l.), with disparity in adoption rates in the eastern united states. a complex of seedling insect pests is found in mid-south soybean, but thrips are the primary early season pest of soybean in virginia and north carolina. published knowledge regarding their impact on soybean yield is minimal, as is the impact of thrips on soybean yield; thrips species composition is also understudied. ...201222812126
effects of soybean vein necrosis virus on life history and host preference of its vector, neohydatothrips variabilis, and evaluation of vector status of frankliniella tritici and frankliniella fusca.soybean vein necrosis virus (svnv) is an emerging tospovirus that is now considered to be the most widespread soybean virus in the united states. svnv is transmitted from plant-to-plant by soybean thrips, neohydatothrips variabilis (beach). we hypothesized that a positive interaction between the host plant, svnv, and the vector may have resulted in the widespread distribution of the virus in a short span of time. our study found that svnv-infected n. variabilis females produced significantly mor ...201627417640
seasonal population dynamics of thrips (thysanoptera) in wisconsin and iowa soybean fields.with the discovery of neohydatothrips variabilis (beach) as a vector of soybean vein necrosis virus (family bunyaviridae genus tospovirus), a relatively new pathogen of soybean, a multiyear study was initiated in wisconsin (2013 and 2014) and iowa (2014 and 2015) to determine the phenology and species composition of thrips in soybean fields. yellow sticky card traps were used to sample thrips at regular intervals in five counties within each state's primary soybean-growing region. the assemblage ...201728011679
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 ...200818801262
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