Cadusafos Inhibits Hatching, Invasion, and Movement of the Potato Cyst Nematode Globodera pallida

The effect of the nematicide cadusafos on the hatching of the potato cyst nematode Globodera pallida in potato root diffusate, soil leachate, and distilled water was investigated. Cadusafos had a significant effect on the hatching, migration, movement, and root invasion by the second-stage juveniles. Hatching was completely inhibited at low concentrations of cadusafos (0.002-0.004 microg/ml), but hatching resumed a week after removing the nematicide. At concentrations of 0.05 microg/ml and higher of analytical-grade cadusafos, the inhibition of hatching was permanent.