Abstract Grape powdery mildew caused by Erysiphe ne ca tor is a limiting factor in grape production. In order to develop effective management strategies, the factors influencing survival of fungus need be identified and characterized accordingly. For this purpose, we focused on effect weather conditions during overwintering viability ascospores. spring 2017 2018, leaf litter bark samples were c...

Powdery mildew ( Erysiphe necator ) is one of the most common and economically significant diseases grapes. Currently, main method controlling disease pesticide treatment. Breeding resistant varieties necessary to reduce chemical treatments. a number grape resistance genes powdery DNA markers for identification allelic status these are known. In study determine presence loci Ren3 Ren9 , 25 geno...