Packard The cleaned extracts were analysed on Hewlett 5890A GC equipped with capillary columns using 63Ni electron capture detector(ECD) and nitrogen- phosphorous detector(NPD). Operating conditions were as per details: For OC and SP insecticides: Detector ECD 63 SPB-5 of 5% diphenyl 95% dimethyl i), column: fused silica capillary column(30 mx0.32 mm ID, 0.25 um film thickness) with split system.