Control of Rice Water Weevil with Fipronil as a Seed Treatment, 1994

Abstract

Abstract Three rates of fipronil (EXP80415A FS 500) as a seed treatment were compared with carbofuran (Furadan 3G) and an untreated check for control of RWW. Experimental design was a RCB with 4 replications. Plot size was 9 rows (7 inch row spacing) × 16 ft. Rice was drill-seeded in a Crowley silt loam at 110 lb/acre 6 May and emerged 13 May. Propanil and thiobencarb at 2 lb (AI)/acre each were applied 23 May. Permanent flood was applied on 13 Jun. Nitrogen was applied in a 3- way split of 120 lb/acre on 13 Jun and 30 lb/acre each on 11 and 21 Jul. Furadan 3G was applied broadcast with a hand shaker on 20 Jun. On 4 and 11 Jul five 4 × 4 inch (diam by depth) soil cores were removed from each plot. Soil was washed from plant roots into 40-mesh screens. Screens were immersed in salt water and RWW immatures were recovered and counted. The center 4 rows × 12 feet of plots were harvested on 27 Sep with a small plot combine. Reported yields were adjusted to 12% moisture.