Assessment of the productive potential and quality of pear fruits of different ripening periods, grown in the south of Russia

The results of a long-term research on the variety study 70 pear varieties from genetic collection State Scientific Institution NCFSCHVW summer, autumn and winter ripening periods, grown in south Russia, are presented. Winter-hardy, late-flowering have been identified, which make it possible to reduce crop losses frosts late spring frosts. Highlighted pears with high yield, valuable for commercial qualities fruit, as well those distinguished by content sugars, acids, vitamins, determine nutritional value medicinal properties fruit.