Control of Rice Stink Bug with Selected Insecticides, 1997

Abstract

Abstract The experiment was conducted at the TAMU Agricultural Research and Extension Center at Beaumont and was designed as a RCB with 6 treatments and 4 replications. Plot size was 25 ft X 6.5 ft of heading (milk stage) rice. On 4 Aug, selected plots were treated with EXP 61096A 100 EC, Sevin XLR Plus, Fury, and Karate at the rates shown in the table. Insecticides were applied with a 4 nozzle (800067 tip size, 50 mesh screens), hand-held spray rig pressurized with CO2. Final spray volume was 12 gpa. Immediately after application and 24 h, 72 h, and 7 d after application, 4 panicles were randomly removed from each plot. Immediately after removal, severed panicles were transported to a greenhouse maintained at 31° C, 70% relative humidity, and 12 h light: 12 h dark. Each set of 4 panicles was caged in a transparent plastic cylinder ventilated with screen windows and a screen top. The severed ends of the panicles were inserted in moist sand contained in a styrofoam cup. The bottom of the cage was secured in the moist sand. Once panicles and cages were in place, each cage was infested with 10 adult RSB collected by sweep net from untreated rice. Forty-eight h after infestation, cages were inspected for live and dead insects. Data was expressed as % mortality which was transformed using arcsine. Transformed data were then analyzed by 2-way ANOVA and means separated by DMRT.