Effect of different nematlcides and neem oil cake in the control of Radopholus similis in yellow leaf disease affected arecanut palms

Investigations were carried out to studY the effect of three nematicides viz., fensulfothion @ 50 g a.i./palm, aldicarb @ 10 g a.i./palm, DBCP@ 10 ml a.i./palm and neem oil cake @ 1.5 kg/palm for the control of Radopholus similis in yellow leaf disease affected arecanut palms. All chemicals were effective in reducing the population of R. similis significantly compared to the control plants. Fensulfothion yielded maximum number of nuts (347.9) and total nut weight (7958 g) per palm, closely followed by aldicarb against untreated plants which yielded maximum number of 36.5 nuts with a total nut weight of 1066 g per palm.