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Resumo: A avaliacao de genotipos de feijao guandu como antagonico, resistente ou tolerante ao nematoide das galhas (Meloidogyne enterolobii), pode elevar o potencial multiuso dessa leguminosa e verificar a reacao de genotipos a esse fitopatogeno, considerado um dos mais agressivos do genero, se faz necessario devido a sua ampla disseminacao e escassez de controle no territorio nacional. Assim este trabalho teve por objetivo avaliar a reacao de seis genotipos de feijao guandu (Cajanus cajan) ao patogeno M. enterolobii. A avaliacao final das plantas ocorreu 80 dias apos a inoculacao dos fitopatogenos, na qual foram mensuradas variaveis de desenvolvimento das plantas: altura da planta, numero de hastes, peso da materia fresca da raiz e peso da materia seca. Assim como tambem variaveis de desenvolvimento do nematoide M. enterolobii: numero de galhas, indice de massas de ovos, fator de reproducao e reducao do fator de reproducao. A hospedabilidade dos genotipos de feijao guandu foi avaliada por meio de cinco criterios classificatorios de distintos ajuizamentos. Para a producao de forragem, tres genotipos foram moderadamente resistentes a M. enterolobii, FGSob/14-09, FGg59-95/14-37 e FG CAM/14-49. No entanto, os genotipos de feijao guandu nao se enquadraram como plantas antagonistas, apresentando suscetibilidade ao fitopatogeno. [ Reaction of genotypes of pigeon pea (Cajanus cajan (L.) Millspaugh) to the root-knot nematode (Meloidogyne enterolobii). Abstract: The eEvaluation of genotypes of pigeon pea genotypes as antagonistic, resistant or tolerant to the root-knot nematodes (Meloidogyne enterolobii), may increase the multipurpose potential of this legume, and verifying the reaction of genotypes reaction to this phytopathogen, considered one of the most aggressive pathogens of the genus, isf necessary due to its wide dissemination and scarcity of control in the national territory. Thus, the objective aim of this studywork was to evaluate the reaction of six genotypes of pigeon pea (Cajanus cajan) to the pathogen M. enterolobii. The final evaluation of the plants occurred 80 days after the inoculation of plant phytopathogens, and the following in which plant development variables were measured: plant height, stem number of stems, weight of root fresh root matter weight and weight of dry matter weight. As well as dDevelopmental variables of the nematode M. enterolobii were also evaluated: gall number of galls, egg mass index, reproduction factor and reproduction factor reduction. The host suitability genotypes of pigeon pea genotypes wasere evaluated based ony means of five classification criteria from different trials. For fodder the production of fodder, three genotypes were moderately resistant to M. enterolobii, FG Sob/14-09, FGg59-95/14-37 and FGCAM/14-49. However, the genotypes of pigeon pea did not fit as antagonistic plants, presenting susceptibility to the phytopathogen.

Reação de genótipos de feijão guandu (Cajanus cajan (L.) Millspaugh) ao nematoide das galhas (Meloidogyne enterolobii)