Persistence of cadusafos (S'S-di-sec-butyl-O-ethyl phosphorodithioate) in soil applied @ 1.0 kg a.i. ha−1 along with NPK (25, 50 and 25 and 50, 100, 50 kg ha−1) and FYM (10.0 and 20.0 tons ha−1) was evaluated in field experiments conducted in two winters. In one season (1998) Pusa Ruby and in another (1999) Azad-T2 tomatoes, Lycopersicon esculentum (Mill) were grown as the ensuing crops. Gas chromatographic analysis revealed that cadusafos persisted in soil beyond 120 days. The dissipation of cadusafos followed first order kinetics. At higher rates, FYM (20 tons ha−1) enhanced and NPK (50, 100 and 50 kg ha−1) decreased the persistence of cadusafos in soil and influenced its half-life (21–23 d in 1998 winter and as high as 34–43 d in 1999 winter).
Persistence, cadusafos, NPK, FYM
