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Summa Phytopathologica

versão impressa ISSN 0100-5405versão On-line ISSN 1980-5454

Resumo

MOREIRA, Francisco José Carvalho et al. Reaction of genotypes of pigeon pea (Cajanus cajan(L .) Millspaugh) to the root-knot nematode (Meloidogyne enterolobii). Summa phytopathol. [online]. 2018, vol.44, n.4, pp.380-385. ISSN 0100-5405.  https://doi.org/10.1590/0100-5405/170978.

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.

Palavras-chave : Phytopathogen; Semiarid; Forage Legume.

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