Estimation of winter hardiness and resistance to fungal diseases of the subgenus Typocerasus Focke in the conditions of the Tula region

Abstract

Aim. Identify the forms of the cherry subgenus Typocerasus Focke , combining high winter hardiness and disease resistance. Methods. Winter hardiness (resistance to sharp and gradual change of thaws by frost) was studied under controlled conditions for the 3rd and 4th components. Resistance to fungal diseases Monilia cinerea Bonord and Coccomyces hiemalis Higg. studied in field conditions in epiphytotic years. Results. The results of the study of winter hardiness and resistance to fungal diseases of 36 species and hybrids of wild-growing cherry of the subgenus Typocerasus Focke in the conditions of the Tula region are presented. As a result of the study, 4 forms of East Asian cherries were selected, combining a high level of winter hardiness of vegetative buds, bark, wood, medium winter hardiness of flower buds and high resistance, non-resistance to moniliosis and coccomycosis; 18 forms combining high winter-resistance of flower buds, average winter-resistance of vegetative buds, tissues and high resistance, intractability to moniliasis and coccomycosis were selected. Main conclusion. Identified species and hybrids of cherry are of interest for creating winter-hardy cultivars of cherries with a fundamentally new, high resistance to fungal diseases.