Residues on Coastal Bermudagrass, Trash, and Soil Treated with Granular Endosulfan12

Abstract

Two applications of endosulfan granules each of 1 lb./ acre of actual toxicant gave inefficient control of nymphs of a spittlebug, Prosapia bicincta, immediately after treatment but good control after 75 days. The endosulfan was applied to Coastal bermuda grass in May 1963, and residue samples were taken in August, 96 days after the second application. Analysis by gas-liquid chromatography showed that samples of grass, trash, and soil from treated areas had average residues of 0.0024, 0.0040, and 0.2246 lb./acre, respectively. Residues consisted of A and B isomers, with B in higher amounts than A, and no detectable amounts of endosulfan degradation products.