IMPACT OF WEATHER AND CLIMATIC FACTORS OF THE SOUTHERN COAST OF CRIMEA ON GRAY MOULD INFECTION RATE OF GARDEN ROSES COLLECTION IN NIKITSKY BOTANICAL GARDEN

The paper studied an impact of weather and climatic factors of the southern Coast of Crimea on the development of gray mould (Botrytis cinerea Pers.) on garden roses collected in Nikitsky Botanical Garden. The parameters of relative humidity, temperature and precipitation were specified during the disease rise. Garden groups and cultivars most affected by gray mould were identified: cluster-flowered: ‘Detstvo’, ‘Bella Rosа’, ‘Champagner’, ‘Hannah Gordon’, ‘Rosemary Rose’; ‘Kazakhstanskaya Yubileinaya’, ‘Auguste Renoire’, ‘Honore de Balzac’, ‘Flamingo’, ‘Pink Ocean’, ‘Polarsten’, ‘Big Purple’, ‘Prestige de Lion’, ‘Folкlore’, ‘Canary’, ‘Narzisse’; semi-climbing garden group ‘Dzhim’, ‘Winchester Cahedral’.