Aspectos epidemiológicos da queima das folhas da cenoura (daucus ca:rota l.) causada por aternaria dauci (Kühn) Graves & Skolko - parte II - efeito da concentração de inóculo e determinação do período de geração de alternaria dauci (Kühn) Graves & Skolko
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1976-04
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Antônio Lopes da Silva
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The effect of the concentration of conidial inoculwn of Alternaria dauci (Kuhn) Graves & Skolko in rela tion to the degree of severity of occurrence of leaf blight on carrot (Daucus carota L.) cultivar Nantes Half Long at 67 - 70 days of age, was studied,
The plants were cultivated under green-house conditions innoculated by atomizing with spore suspension, ad after,,:ards,maintened for 72 hours in an incubation cha ber with temperature controlled at 18 - 24QC and relative humidity of 100% (foggy}. The spore concentrations testes were O, 10 , 10 , 5 x 10 and 2 x 10 spores/rnl. There were significant differences in the treatments at the 5% level in relation to severity of the leaf blight, the total wei ght of the plants, and the weight of the roots.
The generation period of the fungus was 6-7, 5, 6 and 6 days, respectively, at 16, 20, 249C and roam tem perature. Detached leaflets were innoculated individually, by using a small brush to spread the spores. After innocul,!! tion, the leaflets were maintained in a moisture chamber. The vitality of the inoculum, seems to be a highly impo tant factor in the deterrnination of the geieration time of the fungus.
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CARVALHO, Yvo de; CHAVES, Geraldo Martins. Aspectos epidemiológicos da queima das folhas da
cenoura (daucus ca:rota l.) causada por aternaria dauci (Kühn) Graves & Skolko - parte II - efeito da concentração de inóculo e determinação do período de geração de alternaria dauci (Kühn) Graves & Skolko. Anais da Escola de Agronomia e Veterinária, Goiânia, v. 6, n. 1, p. 80-96, jan./dez. 1976. Disponível em: <https://www.revistas.ufg.br/pat/article/view/2239/2192>.