EFFICACY OF NEEM PESTICIDES ON PROTECTION OF MUNG BEAN AGAINST MELOIDOGYNE-INCOGNITA

Experiments were conducted to elucidate the efficacy of three neem pes ticides, Nemark, Neemazal or Nimbicidine, at different application rat es and times of application on protection of mung bean 'T-44' against Meloidogyne incognita race-1. There were no significant differences be tween plants treated with neem pesticides alone, but not inoculated wi th nematodes and planes having neither nematodes nor pesticides. All t he pesticides at the highest (1000 mg/l) and next higher (100 mg/l) co ncentrations significantly reduced gall development and reproductive F actors and increased plant growth and nodule formation compared to mun g bean plants inoculated with nematodes alone. Greatest suppression in gall development and nematode reproductive factor and increase in pla nt growth and nodule formation occurred in pots treated with Nemark, i ntermediate with Neemazol and lease with Nimbicidine. Application of p esticides into soil 10 days before nematode inoculation provided great est protection to mung bean. This was followed by application of pesti cides at the time of nematode inoculation. The effect of these pestici des were lease when delivered into the soil 10 days after nematode ino culation.