Bean diseases in Zona de Mata, State of Minas Gerais

Vieira, C.

Rev Ceres 11(62): 73-91


Accession: 024223772

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Among the chief causes of low bean yield in Zona da Mata (600-700 kg/ha) is the incidence of various diseases. Anthracnose (Colletotrichum lindemuthianum) and rust (Uromyces phaseoli var. typica). are the 2 most important. Of 54 bean varieties studied in Vicosa, 9 proved resistant to anthracnose and 9 to rust; 6 of which only 2 are commercial types, showed resistance to both diseases. This study was made under field conditions and only in Vicosa, with the race or races (?) of the fungi which exist there. In order of importance, after anthracnose and rust, are root rot (Sclerotium rolfsii) and mosaic. The following are of minor importance: angular leaf spot (Isariopsis griseola), powdery mildew (Erysiphe polygoni) and root knot (Meloidogyne sp.). Symptoms of these diseases are described and the means of dissemination and control discussed. The following fungi also have been found as parasites on bean, but are of very little importance: Alteraria brassicae phaseolus, Cercospora canescens, Phyllosticta phaseolina, Rhizoctonia microsclerotia and Ovularia phaseoli.