DESTROYER PATHOGEN OF POTATO (SOLANUM TUBEROSUM) IN GEORGIA.

Phytophthora infestans (Oomycota) remains a problem to production agriculture. Historically there have been many controversies concerning its biology and pathogenicity, some of which remain today. Composition pathogenic fungi potato (Solanum tuberosum) is discussed in this article. 50 species of microbiota fully identified. Also, 11 species of fungi involved in the formation of the consortium on tuber potato plants were identified. Long-term (1985-2015) monitoring showed that the destructive pathogen potato late blight is what causes the most damage and economic losses. favorable and unfavorable weather conditions and the development of its distribution was found. Experiments have shown that widespread rot of potato is significantly different from other types of fungi in the aggressiveness and severity. He can completely destroy all the varieties of potato plants in some localities within 5-6 days. The highest disease severity was on the Nevsky and Picaso variety, the highest resistance to diseases manifested in 3 years German variety – Kardena,Russian – Sante, Finland – Katu and Holland variety - Desire.