Monitoring of weather conditions in the autumn-winter period and their influence on the frost resistance of blackberry plants (Rubus Fruticosus L.)

Goal. To determine the resistance of blackberry varieties to low temperatures in field and laboratory conditions; select most resistant investigate influence weather conditions on state their overwintering. Methods. Laboratory, field, analytical. Results. Weather were monitored autumn–winter period 2019/20 2020/21. It was established that winter months these years differ significantly terms temperature, amount, type precipitation. noted Cacanska Bestrna variety (12.2 points) characterized by highest level frost conditions. The average fixed for Heaven Can Wait (17.0 points), Loch Tay (14.5 Triple Crown (19.2 varieties. results experiment freezing under artificial showed bud part stem section through vulnerable temperatures, middle shoot least vulnerable. buds experienced during to–25°C, which indicated potential more stable fruiting. Conclusions. Coming from winter, 2020/21 a good conducting research varieties, significant temperature changes (minimum January –20°C, February — –18°C) sharp thaws (up +4.5°C). determined did not negatively affect plants However, we assume autumn 2019 contributed longer growth shoots, caused decrease temperatures. researched of–25 and–30°C established.