Reação de Cultivares de Girassol (Helianthus annuus L.) a Meloidogyne incognita Raça 3 e Meloidogyne javanica

The sunflower crop is growing on the national scene, but there are many pathogens that can become limiting for the production, among them are the gall-forming nematodes, which are spread in almost all agricultural regions of the country. This work aimed to assess the reaction of sunflower cultivars to nematodes Meloidogyne incognita race 3 and M. javanica. At 88 days after inoculation, proceeded to the evaluation considering the average number of eggs per gram of the root (MNGR), the average total number of nematode eggs per treatment and J2 (MNNOT) and numbers of eggs per treatment (MNOT) thereby determining the multiplication in relation to the initial inoculation. The okra cv. Santa Cruz (Abelmoschus esculentus (L.) Moench) and Crotalaria breviflora were used as witness of susceptibility and resistance respectively. The four cultivars behaved as hosts because they showed higher values of nematodes. The Cultivar Agrobel 960 present (MNNOT) and (MNOT) of M. javanica less than to witness and in relation to other cultivars.