General guideline for the control of potato late blight (Phytophthora infestans) in Switzerland
1997
Cao Keqiang (Hebei Agricultural Univ., Baoding (China). Dept. of Plant Protection)
Historical weather data of recent seven years from 22 weather stations in Switzerland were analysed according to crucial weahter conditions for the epidemic of potato late blight (Phytophthora infestans). Close relationship was found between disease incidence and the crucial weather conditions by treatment intervals of 6, 9 and 12 days, the treatment times for each potato growing region were achieved. June has been proved to be the most important month for both disease development and chemical treatment. Although because of the great variation of the weather, such suggestions are rather general. It is beneficial for people to understand the ecological difference among different regions and to get a perfect disease management
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