Post-inoculation soil treatments of pesticides on the development and reproduction of Meloidogyne incognita in tomato

The relative efficacies of nine pesticides on the development and reproduction of Meloidogyne incognita in tomato roots have been evaluated under pot culture conditions by applying to soil at the rates of 2,4 and 8 kg ai/ha, 10 days after infestation with 3000 larvae per pot. Phenamiphos, oxamyl, fensulfothion, carbofuran, phorate and aldicarb reduced the total endoparasitic population. The development of nematodes was inhibited by phenamiphos, oxamyl, fensulfothion and carbofuran for 40 days of larval inoculations. Egg-mass production was suppressed for 30 days by phenamiphos and oxamyl at 2 kg ai/ha, fensulfothion and carbofuran at 4 kg ai/ha and 8 kg ai/ha of phorate and aldicarb. Quinalphos, chlorpyriphos and mephospholan did not affect normal development and reproduction of the nematodes though quinalphos had initially reduced the total number of nematodes in tomato roots.