The formation of embryonic inflorescences and realization of productivity potential of commercial grape varieties in the temperate continental climate of southern Russia

In the Russian Federation, the main production of grapes is concentrated in the southern regions, in unstable weather conditions of a temperate continental climate. When the weather conditions deviate from the optimal values for the grape plants, they experience stress. Embryonic inflorescences are thr most sensitive to abnormal air temperatures in winter, during forced rest of plants. After wintering, the plant loses part of the inflorescence, and the expected harvest of grapes decreases. A degree of realization of the potential of economic productivity is on the average 60%. In these conditions, the problem of preserving embryonic inflorescences during the wintering of plants, increasing the degree of realization of the potential for economic productivity in varieties of V. vinifera grapes is topical in the Russian viticulture. The aim of this work is to reveal the degree of setting and preservation of embryonic inflorescences during winteringand the level of realization of the productivity potential in grape varieties of different eco-geographical origin...