The pathogen overwintered as sporangium on infected leaves. The control effects of 1% Bordeaux mixture,50% Topsin and 50% Carbendazim were 66.2%,45.9% and 33.8% respectively.

• 在病原侵染初期分别用 1%25波尔多液、5 0%25托布津和5 0%25多菌灵做防治试验 ,防治效果分别为 6 6 2%25、4 5 9%25和 33 8%25。