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Disease Note.

Root Disease of Centrosema pascuorum Caused by the Javanese Root-Knot Nematode in the Cerrado Region of Brazil. R. D. Sharma, EMBRAPA/Centro de Pesquisa Agropecuária dos Cerrados, Caixa Postal 70.0023 Planaltina-DF, Brasil. B. Grof, EMBRAPA/Centro de Pesquisa Agropecuária dos Cerrados, Caixa Postal 70.0023 Planaltina-DF, Brasil. Plant Dis. 72:546. Accepted for publication 2 March 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0546B.

Centrosema pascuorum Benth. is a native tropical American annual herbaceous, twining plant mainly grown experimentally as a pasture legume in Central and South America. Twelve accessions of this legume were sown at the beginning of the rainy season in November 1986 on a dark red latosol in the Cerrado region of Brazil. All the accessions germinated well and remained green until the end of February 1987, after which the plants showed symptoms of unthrifty growth. The leaves of affected plants turned yellow, dried, and eventually withered. None of the accessions flowered and all senesced prematurely. Root systems of diseased plants were severely galled, and examination revealed different stages of root-knot nematode. Microscopic examinations of the perineal pattern of adult females showed that each accession was infected with the Javanese root-knot nematode, Meloidogyne javanica (Treub) Chitwood. This legume is a hitherto unrecorded host of Javanese root-knot nematode (1).

Reference: (1) R. J. Clements et al. Trap. Grassl. 20:59, 1986.