A PECULIARITIES OF PRINCIPAL DISEASES MANIFESTATION ON STRAWBERRY

Abstract

Data on the resistance of the strawberry varieties to the above diseases are presented in the article. Many modern strawberry varieties having a high level of commercial characters are susceptible to diseases. White and brown leaf spots are the most harmful diseases in the conditions of Orelregion. With mass infection of strawberry plants, pathogens can affect up to 90% of the leaf mass. The aim of the studies was to evaluate the strawberry varieties for resistance to white and brown leaf spots and identify the most promising varieties for the further breeding. 41 domestic and foreign strawberry varieties have been studied. Currently, the main preventive measures against diseases are the selection of resistant varieties, the use of healthy planting material, as well as the control of leaf infections with fungicides before and after harvest. As a result of the studies, the most resistant varieties to white and brown leaf spots have been identified: Bogema, Bereginya, Rosinka and Krymskaya Rannia which are mostly promising for cultivation in the Central Chernozem region. The strawberry varieties Jonsok, NF 311, Sara, Marmolada, Sonata, Civ 64, Rubin and Frida were susceptible to white and brown leaf spots during three years with the degree of damage 3 points.