The objective of this experiment was to evaluate the efficacy ofinsecticides on brown marmorated stink bug (BMSB) on edible soybean(edamame). Edamame was planted on 6 Jun at Virginia Tech KentlandFarm near Blacksburg, VA. Plots were arranged in an RCB designconsisting of two row plots that were 20 ft in length spaced 3-ft apart.The experiment had seven treatments, one of which was an untreatedcheck, with four replicates. BMSB was the predominant stink bug speciesobserved, and bugs were assessed on 9, 19, and 23 Sep by carefullyinspecting plants in each plot for 30 s and recording the numbers seenincluding those that flew away or dropped to the ground. Insecticideapplications were made on 5 and 15 Sep using a three-nozzle boombackpack sprayer equipped with D3 tips at 40 psi. Applications weremade at 10 GPA when the edamame pods were at the R4 to R5 growthstages. Immediately following the 15 Sep spray application, 5-gal paintstrainer mesh bags were placed over fruiting limbs containing at least 10pods and the bags sealed with twist ties after inserting five adult BMSBcollected from nearby untreated edamame. After 4 d in the field, bagswere excised from the plants and taken to the lab where insect mortalitywas assessed. Stink bug counts and proportion mortality data wereanalyzed using ANOVA. Means were separated using Fisher’s protectedleast significant difference test (P ≤ 0.05).
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