Nematotoxicity of some phosphonates and phosphorothiolates against root-knot nematode Meloidogyne incognita¹

The result of four aryl phosphonates and two phosphorothiolates assayed against possible control of Meloidogyne incognita has been reported. Dichloromethyl 0, 0-di(2,4,5-trichlorophenyl) phosphonate was found to be the most effective chemical in vitro studies. The plant growth characters were not adversely affected by the use of these chemicals However all the test chemicals have significantly controlled the gall index with maximum reduction in the case of S-methyl 0,0-di (1, 4, 5-trichlorophenyl) phosphorothiolate.