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Navegação Bragantia por autor "Costa, A. S."

Navegação Bragantia por autor "Costa, A. S."

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  • Clorose das folhas do cafeeiro excelsa
    Costa, A. S.; Mendes, J. E. Teixeira (Instituto Agronômico (IAC), 1951-07)
    A type of leaf chlorosis is shown by plants of excelsa coffee growing in nursery beds in a lath house at the Instituto Agronômico, Campinas. Tests made with various elements showed that this type of chlorosis is due to ...
  • Estudos sobre a mancha aureolada do cafeeiro
    Costa, A. S.; Silva, Darcy Martins da (Instituto Agronômico (IAC), 1960-04)
    The widespread halo blight onslaught on young coffee plantings in 1955 and 1956 was not repeated in the following two years except in one or two instances. Plantings that had been severely affected in those years recovered ...
  • Evidência electrono-microscópica de multiplicação dos vírus do mosaico do fumo e de vira-cabeça, em tecido foliar de cafeeiro
    Kitajima, E. W.; Costa, A. S. (Instituto Agronômico (IAC), 1970-08)
    Coffea plants (Coffea arabica L.) may be infected with vira-cabeça (Brazilian tomato spotted wilt) or tobacco mosaic (TMV) viruses, by mechanical means. Vira-cabeça virus (VCV) induces on leaves of ino- culated plants, ...
  • Infecção de cafeeiros com vírus de vira-cabeça
    Costa, A. S.; Silva, B. N.; Carvalho, Ana Maria B. (Instituto Agronômico (IAC), 1960-03)
    Coffee plants inoculated by rubbing with the tomato spotted wilt virus were highly resistant. Plants that were preconditioned in the dark for 4-8 days and inoculated in a similar manner developed concentric local lesions ...

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