Bean diseases in the northern region of the state of minas gerais brazil

Goulart, A.C.P.

Fitopatologia Brasileira 13(3): 230-232


ISSN/ISBN: 0100-4158
Accession: 007051152

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A disease survey of common bean (Phaseolus vulgaris L.) was carried out in the northern region of Minas Gerais in 1985 and 1986. Occurrence, severity and prevatence of diseases were observed in 68 fields, 30 in the first year and 38 in the second. Rust (Uromyces phaseoli var. typica) and powdery mildew (Erysiphe polygoni) were the most frequent pathogens, having been found in all fields sampled. In the 1985 crop season bacterial blight (Xanthomonas campestris pv. phaseoli) and damping-off (Rhizoctonia solani) were observed in 36.5 and 32.0% of the fields, respectively. Other diseases such as anthracnose (Colletotrichum lindemuthianum), angular leaf spot (Isariopsis griseola), ashy stem blight (Macrophomina phaseolina), southern blight (Sclerotium rolfsii) and Alternaria leaf spot (Alternaria sp.) occurred less frequently. In 1986 the presence of dry root rot (Fusarium solani f. phaseoli), bacteria blight, damping-off and Fusarium yellows (Fusarium oxysporum f. phaseoli) was detected in 62.4, 42.0, 35.4 and 27.2% of the fields, respectively. Anthracnose, angular spot and Alternaria leaf spot were found in a smaller number of fields. In all fields surveyed at least one of these diseases was found.