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Ciência e Agrotecnologia

versão impressa ISSN 1413-7054versão On-line ISSN 1981-1829

Resumo

TAVARES, Giltembergue Macedo  e  SOUZA, Paulo Estevão de. Effects of fungicides on the in vitro control of Colletotrichum gloeosporioides, the anthracnosis etiologic agent of the Papaya tree (Carica papaya L.). Ciênc. agrotec. [online]. 2005, vol.29, n.1, pp.52-59. ISSN 1413-7054.  https://doi.org/10.1590/S1413-70542005000100006.

The efficiency of fungicides on Colletotrichum gloeosporioides was evaluated in vitro in the Laboratory of Epidemiology and Diseases Management of the Department of Phytopathology /UFLA. The fungicides were applied either in BDA medium or in glass slide chambers, the latter to assess the effects on conidial germination.  The fungicides tested were: azoxystrobin, chlorothalonil, sodium hypochloride, imazalil, copper oxychloride, prochloraz, propiconazol, tebuconazol, thiabendazol and thiophanate-methyl in the concentrations of  0, 1, 10, 100, 500 and 1.000 ppm to evaluate the inhibition of the mycelial  growth and in the concentrations of  0, 1, 10, 50 and 100 ppm to test inhibition of the conidial germination. The fungicides azoxystrobin, chlorotalonil, imazalil, prochloraz, propiconazol and tebuconazol presented high efficiency in the inhibition of the mycelial growth. The fungicides of the benzimidazol group (thiabendazol and thiophanate-methyl) showed low efficiency in the control of C. gloeosporioides. Sodium hypochloride showed low efficiency in the control of the mycelial growth of the fungus. For inhibition of the conidial germination, the fungicides oxychloride, chlorothalonil and sodium hypochloride showed high efficiency, even at low concentrations. C. gloeosporioides showed to be tolerant to the fungicides thiabendazole and thiophanate-methyl, as conidial germination and mycelial growth were not affected in the presence of these products.

Palavras-chave : Colletotrichum gloeosporioides; Carica papaya; chemical control; papaya tree.

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