The effect of Rhizoctonia solani, Sclerotium rolfsii, and Verticillium dahliae on the resistance of tomato to Meloidogyne incognita

Abstract

The effect of Rhizoctonia solani, Sclerotium rolfsii and Verticillium dahliae on expression of resistance to root-knot nematode, Meloidogyne incognita in tomato cultivars F-24-C8 (immune), Heinz-1409 (resistant) and T-4 (moderately resistant) was studied under greenhouse conditions. V. dahliae reduced the resistance of all theree cultivars, R. solani reduced the resistance only of T-4 and S. rolfsii only of Heinz-1409. Egg production was highest in each treatment when nematodes were added two weeks before fungal inoculation, compared with one week before or simultaneously.