Incidência de doenças em ensaios de variedades de feijoeiro na cultura das águas no Estado de São Paulo

Bean disease survey in São Paulo

NOTA

Incidência de doenças em ensaios de variedades de feijoeiro na cultura das águas no Estado de São Paulo¹

Bean disease survey in São Paulo

Hiroshi Kimati²; H. A. A. Mascarenhas

SUMMARY

A survey was made on the occurrence of dry bean (Phaseolus vulgaris L.) diseases in variety trials carried out during the raing season planting at eleven localities in the State of São Paulo.

The diseases identified were, as follows; common blight (Xanthomonas phaseoli (EFS) Dows.), anthracnosis (Colletotrichum lindemuthianum (Sacc. et Magn.) Scrib.), rust (Uromyces phaseoli (Reben) Wint., var. phaseoli), mosaic (virus), and root rot (Fusarium sp., Rhizoctonia solaniKühn, and Sclerotium rolfsii Sacc). Data on common blight, anthracnosis, rust, and virus diseases were tabulated (tables I-IV). They indicate that there was a great variation in the incidence of diseases and severity of symptoms between localities and varieties. These variations are attributed to differences in environmental conditions, varietal resistance or tolerance to the diseases, and the use of disease-free or infected seed.

The varieties Pintado, Creme, Feijão 60 Dias, and Preto G-1 showed tolerance to bacterial blight; Preto G-1, Feijão 60 Dias, Manteiga, and Pintado were tolerant to rust. The Rosinha group and Preto showed great susceptibility to anthracnosis. Preto G-1 was highly susceptible to virus diseases.

Since bacterial blight, anthracnosis, and common bean mosaic are seed borne, the use of disease-free seed is recommended. Production of these can be achieved in localities where occurrence of these diseases is minimal and by using adequate techniques.

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Recebido para publicação em 22 de março de 1967.

1

Trabalho realizado com auxílio da Agência Norte-Americana para o Desenvolvimento Internacional (USAID) e da Fundação de Amparo à Pesquisa do Estado de São Paulo. Apresentado na Reunião da Sociedade de Olericultura do Brasil, em Campinas, entre 17 a 23 de julho de 1966.

2

Cadeira de Fitopatologia e Microbiologia Agrícola ESALQ.

Datas de Publicação

• Publicação nesta coleção
  24 Mar 2009
• Data do Fascículo
  Jan 1967