Movement of cadusafos in soil and invasion of Meloidogyne incognita juveniles in eggplant roots

Movement of cadusafos, an organophosphatic nematicide-insecticide, was studied in sandy loam soil by applying it @ 0.0, 1.0, 2.0 and 3.0 kg a.i./ha in 15 cm x 6.25 cm plastic cylinders and estimating its concentration in soil profile (0–5 cm, 5–10 cm and 10–15 cm) with a gas chromatograph. Thirty-day old seedlings of eggplant (Solanum melongena L.) cultivar Pusa Purple Long were transplanted in these soils and inoculated with juveniles of Meloidogyne incognita (5 juveniles/g soil). Invasion of juveniles in roots was studied after 10 days. Cadusafos adversely affected the juvenile invasion in roots. Reduction in invasion of juveniles in roots and residue concentration of cadusafos in soil was significantly correlated and this criterion may have a potential use as indicator of movement of cadusafos in alluvial soils.