Search resistant samples of quince to moniliose

Abstract

In recent years, the yield of quince is reduced due to the annual pressure stress biostress and often observed epiphytotics of harmful diseases. In the south, there is an acute issue of selection for resistance to the most harmful disease in the quince - moniliose. On this basis, the main focus in the southern region is to work on improving the quince assortment in the direction of searching and creating varieties resistant to moniliosis, increasing their adaptability, yield and fruit quality. The main goal of the research was to study the reaction of the collection and hybrid stock of quince to the changing environmental conditions in recent years and the selection of promising varieties with environmental plasticity and disease resistance to replenish the regional assortment of the region. Studies were carried out in 2011-2018 on the basis of OPK "Central", Krasnodar. The test plot was laid in spring 2007, the plants are placed with a feeding area of 5x2 m. The varieties and elite forms of quince are selected from various ecological-geographical groups. The article presents the results of a study on the reaction of quince varieties to changing climatic conditions and their manifestation of varying degrees of resistance to moniliosis. The defeat of varieties in epiphytotic years was noted from 2 to 5 points. As a result of the research, the quince varieties were selected: Sofia, Gift, Heiress and elite form 3-1-19 of breeding NCFSCHVW, as well as the introduced Taman variety with relative resistance of flowers to moniliosis, which are recommended for cultivation in the conditions of southern Russia.