THE DISSIPATION OF LAMBDA-CYHALOTHRIN FROM COTTON PRODUCTION SYSTEMS

The dissipation of the pyrethroid, lambda-cyhalothrin (2-chloro-3,3,3- trifluoroprop-1-enyl)-2,2-dimethyl cyclopropanecarboxylate] was studie d in sterile buffer solution at two different pH values. It was observ ed that during the four week period, lambda-cyhalothrin was degraded i n buffer solution at pH 9, with a half-life of 53 days, but not at pH 7. Isomerization of this compound was also observed at both pH values, but the rate was much greater at pH 9.