Efficacy of Selected Insecticides for Control of Redbanded Stink Bug 1, 2017 Open Access

A trial was conducted on a grower field in Jefferson County, Arkansas to evaluate the efficacy of selected insecticides to control redbanded stink bug (RBSB) in soybean. Plot size was four rows by 50-ft long planted on 38-inch rows, arranged in an RCB design with four replications. Soybean was planted on 25 May. Insecticides were applied with a Mud-Master sprayer equipped with a multiboom delivering 10 gpa at 40 psi through 80-02 dual flat fan nozzles with 19.5-inch spacing. Insecticide application occurred on 27 Sep and was applied again to the same plots on 6 Oct. RBSB densities were determined by taking 25 sweeps per plot with a 15-inch diameter net. Samples were taken on 27 Sep and 2 Oct, 6 and 11 days after the first application (6 DAT1 and 11 DAT1) and on 10 and 16 Oct, 4 and 10 days after the second application (4 DAT2 and 10 DAT2), respectively. Data were analyzed with ANOVA and means were separated using a Duncan’s New MRT (P < 0.10).

RBSB densities ranged from 41 to 124/25 sweeps in the UTC throughout the duration of the trial, well above the current economic threshold (ET) of 4 RBSB/25 sweeps (Table 1). All treatments reduced RBSB densities compared with the UTC but none reduced RBSB densities below the ET after the first application. After the second application, Leverage 360 was the only treatment to provide enough control to reduce RBSB densites below the ET, but was not different from any other treatment except Bifenthrin 6 oz/acre. In general, treatments with multiple modes of action performed better than those containing a single mode of action.

This research was supported by industry gifts of products and research funding.