ТЕМПЕРАТУРНАЯ ЗАВИСИМОСТЬ ПАТОГЕНА VERTICILLIUM DAHLIAE KLEB. НА КУЛЬТУРУ КЛУБНИКИ СОРТА «ELSANTA»

Abstract

In the most common strawberry cv. «Elsanta», Verticillium infection can led to rapid and strong wilt up to death of plants. It is known, that a death plant can be stand as a direct neighbour to complete vital ones, wilt symptoms can differ per year. 432 genotypes of Verticillium dahliae Kleb. from wilted and vital plants were isolated from 8 fields and typed by PCR-fingerprints. Under sterile conditions in a climate chamber plants were inoculated by a single genotype, using 2 7 genotypes out of the 432. Plant reactions were different in relation to the genotype with very low deviation per genotype. Wilt symptoms of these genotypes can be classified as apathogenic, mild and strong pathogenic. Under enhanced temperature of a second climate chamber, symptoms are useable to classify genotypes further as pathogenic under cold or warm conditions. A mixture of different climate-depended pathogenic genotypes was tested in a plot experiment resulting in vital plants with enhanced growth. From these data we conclude that the actual population in the plant is the main factor for wilt symptoms, the mixture of genotypes is the key for interpreting different symptom classes. Mixture of different genotypes can be used to control wilt symptoms for different climate regions (WO 2007/051654).