PROSPECTS FOR THE USE OF INTRODUCED POTATO VARIETIES IN THE CONDITIONS OF KARELIA

Abstract

The results of studying the yield and infectability of potato planting material by a complex of diseases (rhizoctoniosis, scab, scab silver) of seven introduced varieties of medium-early (Innovator, Sylvia, Mozart, Courage) and medium-late (Sifra, Saturn, Asterix) ripeness groups compared with the zoned (respectively Nevsky and Lugovskaya). To identify the main variables and determine the uniformity of varieties according to the studied parameters, the principal component analysis (PCA) method was used. It was found that in the mid–early maturity group, according to a set of indicators, the best results were obtained in the Sylvia variety (average yield of 32.3 t/ha due to the prevalence of tubers of a large fraction, the degree of development of rhizoctoniosis and scab up to 16.1%) and mid-late Asterix (yield of 26.4 t/ha with the dominance of medium and small fractions and the lowest incidence of rhizoctoniosis 9.7%). The yield of the zoned varieties, not exceeding 32.5 t/ha for Nevsky variety, 23.0 t/ha for Lugovskaya, was combined with a weak susceptibility of tubers to silver scab 27.1%. The potential of the studied introduced varieties indicates the possibility of their successful cultivation in northern conditions.