Abstract:

Different varieties A5、A6、A8、A9、A10、7-1、20of the Russia 、Fugui (china)and naiyun2000 of the Japanese tomato were used as materials for the indentification of Tomato Phytophthora infestans(Mont.) De Bary in detched sage sequent and varieties selection. The results showed that:(1)The optimum spore concentration for inoculation was 1×103spores /mL; (2)The disease index of young seedlings was lower than that of the detached leaves;(3)The disease-resistance of Russia tomato variety naiyun 2000 is the best ,the disease-resistance of A9、20、7-1、A5 and A8 have the medium resistance,Fuigui and A6 have the lowest resistance.Therefor, varieties naiyun 2000 of the Japanese tomato and A9 of the Russia tomato may be used as the varieties of resistant Phytophthora infestans or parents of resistant Phytophthora infestans.