HOT WATER THERAPY IN PHYTOSANITARY SELECTION OF GRAPEVINE
The possibility of incorporating hot water therapy (HWT) into the process of obtaining the initial healthy grapevine clones by phytosanitary selection was tested. The task of HWT is the maximum removal of infectious principles of phytoplasmic, bacterial and fungal diseases while maintaining the viability of the vine. As a result of the studies, it was found that processing grapevine cuttings at a temperature of 51оС for 45 minutes does not affect the viability of the vine: the percentage of sprouting of the eyes and rooting of the cuttings was 76-92%. The HWT of the graft and rootstock vines during the cultivation of grafted grape seedlings did not adversely affect the callus formation and survival rate of the grafting components. The percentage of receiving standard seedlings depended on the variety and conformed from 92,5 to 97,2 %. The inclusion of HWT in the process of phytosanitary selection and growing seedlings for uterine plantings of grapes will significantly increase the guarantee of planting industrial vineyards with biological material that will be free from phytoplasm, bacterial and fungal infections.