Impact of Bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) on Soybean Yield and Quality Under Field Conditions.

Bemisia tabaci MEAM1 (Hemiptera: Aleyrodidae) is a key insect pest in soybean fields in Brazil but data are lacking on the relationship between pest abundance and crop yield and quality. Controlled infestation studies were conducted on caged soybean plants in the field over a two year period at two sites in Brazil. Differences in temperature in the two years affected population growth of B.

Correlation-Based Network Analysis of the Influence of Feeding on Photosynthesis and Foliar Sugar and Starch Composition in Soybean.

(MEAM1) represents a species of economic importance in soybean. One of the obstacles to the management of is the quantification of damage by the pest because damage is indirectly inferred through losses in productivity. The objective of this study was to characterize the influence of feeding on soybean by assessing effects on photosynthetic parameters and the sugar and starch content of soybean leaves.

Sublethal Effects of Diamide Insecticides on Development and Flight Performance of (Lepidoptera: Noctuidae): Implications for Bt Soybean Refuge Area Management.

High-dose and refuge are the most important strategies for delaying resistance evolution in Bt crops. Insecticide sprays in refuge areas could be necessary and may limit refuge effectiveness. Here, we evaluated the sublethal effects of two diamide insecticides (chlorantraniliprole and flubendiamide) on life history traits and flight performance.

Evaluation of sampling methods and development of sample plans for estimating predator densities in cotton.

The cost-reliability of five sampling methods (visual search, drop cloth, beat bucket, shake bucket, and sweep net) was determined for four groups of predatory arthropods on cotton plants in Texas. The beat bucket sample method was the most cost-reliable sampling method for Orius adults, and the beat bucket and drop cloth were the most cost-reliable methods for Orius nymphs. The drop cloth and beat bucket were the most cost-reliable methods for sampling spiders.

Flight behavior of methyl-parathion-resistant and -susceptible western corn rootworm (Coleoptera: Chrysomelidae) populations from Nebraska.

Relative flight behavior of methyl-parathion-resistant and -susceptible western corn rootworm, Diabrotica virgifera virgifera LeConte populations, was studied as part of a larger effort to characterize the potential impact of insecticide resistance on adult life history traits and to understand the evolution and spread of resistance. A computer interfaced actograph was used to compare flight of resistant and susceptible individuals, and flight of resistant individuals with and without prior exposure to methyl-parathion. In each case, mean trivial and sustained flight durations were compared among treatments.