The pesticides chlorpyriphos-methyl, pirimiphos-methyl and permethrin were
applied to wheat and stored for 52 weeks at 25, 30, 35 and 40 degreesC, and
at 10 and 13% m.c. Rates of loss were calculated from the residue analyses
of pesticides in treated wheat at monthly intervals during the storage per
iod. Calculated half-lives and pseudo first-order rate constants of these p
esticides are discussed with reference to temperature and moisture. (C) 200
0 Published by Elsevier Science Ltd.