Poster: Late and Moved Abstracts

Abs # 1013: PHYTOPHTOROSIS AGENT Phytophthora infestans POPULATIONS RESEARCH AND ESTIMATION OF THEIR INFUENCE ON TOMATO PLANTS IN AGRICULTURE OF UKRAINE

Presenter:	Kyziurova, Olga P, kyziurova@ukr.net
Authors	Kyziurova, Olga P (A)
Affiliations:	(A): Scientific Research Institute of Vegetable Growing

Till the beginning of 80th of XX it has been considered that agent of tomato and potato plants phytophtorosis Phytophthora infestans appears at first on potato plants, reconstructing from infected tubers after wintering, and than migrates to tomato plants. But subsequently it was received the data of another source of pathogen renovation existence except potato tubers. It is considered that oospores, sexual spores of fungus, may be such a source. It has been recorded homothalious and self-fertile cultures presence in number of researches. In the research the fungus ability of spores’ cultivation on tomato crop in field condition was revealed. The determination of sexual structure of Phytophthora infestans in Ukrainian conditions is one of the purposes of this research. Determination of sorts and hybrids of tomato plants stable to phytophtorosis on the territory of Ukraine for further using in selective work is the other aim of the research. Modified methods of N.A.Dorozhkin have been used under researches of Phytophthora infestans ability to form oospores on tomato plants. It has been established that quantity of oospores on leaves surface of studied tomato plants vary from 4 to 18 mm2. Only on the Dolya sort tomatoes oospores were not discovered. It hasn’t been established in the above research correlation dependence between oospores quantity and sort stability. The oospores quantity on researched sorts depended on affection intensity of every single leaf. The research on determination of sorts and hybrids of tomato stable to phytophtorosis has been held in Research Agricultural Enterprise “Boyarskloye” of the Boyarka Scientific Research Institute of Vegetable Growing.