Wpływ niektórych czynników agrotechnicznych na porażenie naci i bulw wybranych odmian ziemniaka przez Phytophthora infestans (Mont.) de bary

polonais. Praca dotyczy wpływu trzech terminów sadzenia /III dekada kwietnia, I i lI dekada maja/ wybranych odmian ziemniaka /Bogna, Ceze, Fala i Fauna/ oraz trzech gęstości sadzenia /20, 30, 40 cm w rzędzie/ na porażenie naci i bulw przez Ph. infestans.

anglais. The aim of this study was to determine the effect of three terms of planting /third decade of April, first and second decades of May / the selected cultivars of potatoes /Bogna, Ceza, Fala, Fauna/ and three spacing systems /20, 30, 40 cm/ on the infection of leaves and bulbs by potatoe late blight. Field studies were conducted in the Agr. Exp. Station Prusy near Kraków in the years 1987-1988 using a method of randomized sub-blocks. Based on the results obtained it was assertained that the date of planting the studied cultivars had no significant effect on the infection of turbers by late blight. Of the tested potatoe cultivars only Ceza proved to be less susceptible to infection of the leaves and tubers by Phytophthora infestans.

polonais. czynniki agrotechniczne, ziemniak, nać, bulwy, Phytophthora infestans

anglais. agrotechnical factors, potato, leaves, tubers, Phytophthora infestans

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