MOVEMENT AND CONVERSION OF ETHOPROPHOS IN SOIL IN WINTER

Publisher Website
Google Scholar
Abstract
After mixing the nematocide ethoprophos [O-ethyl S,S-dipropyl phosphorodithioate] with the top 9 cm of soil columns, the columns were set up in the field. The percolation water was collected, and, at regular intervals, parts of the columns were separated into layers, which were analyzed for ethoprophos by GLC. In winter, there was distinct movement of ethoprophos in the 2 loamy soils, although the nematocide was retained in the top 30 cm. In a humous loamy sand soil, mobility was comparatively low. Ethoprophos could not be measured in the percolation water. At the end of April, only about 10-20% of the dose was left in the 2 loamy soils, whereas about 75% remained in the humous loamy sand soil. In incubation studies in the laboratory, substantial conversion of ethoprophos occurred in loamy soils at temperatures down to 2.degree. C.

This publication has 1 reference indexed in Scilit: