DISSIPATION OF ENDOSULFAN ON CAULIFLOWER (BRASSICA-OLERACEA VAR BOTRYTIS-SUBVAR-CAULIFLORA)

An experiment was conducted during winter season 1989-90 to study diss ipation of endosulfan residues on cauliflower (Brassica oleracea L. va r botrytis L subvar cauliflora DC.), following iu application @ 500 an d 1 000 g ai/ba. The residues of endosulfan were estimated in the head and leaf samples collected at various intervals by gas-liquid chromat ograph. The maximum deposits on heads and leaves were 4.76 and 3.46 mg /kg at 500 g ai/ha and 8.65 and 6.38 mg/kg at 1 000 g ai/ha. At 500 g ai/ha its residues decrease below the maximum residue limit of 2 mg/kg in 3 days. Hence endosulfan @ 500 g ai/ha may safely be used after ob serving this waiting period.