Evaluation of Selected Insecticides for Control of Green Stink Bug, 2019

In this field trial, Asgrow 47X9 soybean was planted in a field located at the Cimarron Valley Research Station located in Perkins, Oklahoma, on 16 May 2019. The plots measured 10 ft × 30 ft with 10 ft alleys. Each plot consisted of four rows that were 30 inch wide. The plots were arranged in a randomized complete block design with four replications. The first stink bugs in the field were found in mid-Sept. of 2019. The pretreatment numbers of stink bugs were recorded on 27 Sep. The samples were collected by counting the number of live nymph and adult stink bugs collected in 25 sweeps within the plot. The average number of stink bugs (both nymphs and adults) was 16. Foliar applications were made on 1 Oct. using a tractor mounted sprayer equipped with a CO₂-pressurized-side delivery boom measuring 15 ft, calibrated to deliver 18 gpa at 40 psi. The nozzles on the boom were Tee Jet XR 8004 flat fan with a 20 in spacing. The tractor traveled at 4 mph to deliver the foliar applications. Weather conditions on the day of application included a temperature of 89°F and winds from the south at about 10 mph. The plots were sampled at 3, 7, and 14 days after treatment (25 sweeps per plot sample). Data were analyzed using ANOVA and the means were separated according to Fisher’s Protected LSD (P ≤ 0.05).

Percent control for all treatments was calculated based on the reduction of pest numbers compared with the mean of the untreated for a given DAT. It ranged 74–97%, 55–85%, and 40–67% at 3DAT, 7DAT, and 14DAT, respectively. The Stallion treatment consistently had significantly fewer stink bugs than the untreated plot and had a higher percent control than the other treatments as compared to the other treatments (Table 1).¹

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