Control of Rice Water Weevil with Karate, 1994

Abstract

Abstract The experiment was conducted at the TAMU Agricultural Research and Extension Center at Beaumont and was designed as a RCB with 7 treatments and 4 replications. Each plot was 15 ft × 12 rows (7 inches between rows) and was surrounded by a metal barrier to prevent movement of insecticide. Plots were drill planted 26 Mar at 100 lb seed/acre. Rice emerged 11 Apr. Rice was fertilized with urea near planting (29 Mar) at 122 lb/acre, 1 d before the application of the permanent flood (29 Apr) at 122 lb/acre, and at panicle differentiation (9 Jun) at 122 lb/acre for a total of 170 lb nitrogen/acre. The permanent flood was applied 30 Apr. From planting to the application of the permanent flood, rice was flush irrigated as needed. Facet and Basagran were mixed with crop oil and applied on 22 Apr at 0.75 lb (AI)/acre for each herbicide. Karate 1EC was applied at the rate and times shown in the table with a 4 nozzle (tip size 800067, 50 mesh screens), handheld, CO, pressurized spray rig. Final spray volume was 32 gal/acre. Furadan 3G was applied at the rate and time shown in the table with a hand-held shaker. From 25 to 26 May (25-26 d after application of the permanent flood), 5, 4 inch diam × 4 inch deep soil cores (each core contained at least 1 rice plant) were removed from each plot. Rice plants in cores were washed and immature RWW recovered from the roots. Plots were harvested at maturity (27 Jul) with a small combine. Yields were adjusted to 12% moisture. Insect counts were transformed using Vx + 0.5. All data were analyzed by ANOVA.