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© 1995, The Board of Regents of the University of Nebraska on behalf of the University of Nebraska–Lincoln Extension. All rights reserved.


A method for forecasting environmental conditions favorable to the development of late blight is described. How is weather data obtained from hygrothermographs and weather stations? How are the data used to calculate severity values? How is late blight forecasted and fungicide applications scheduling recommended? These questions will be answered here. The intended audience is potato growers; tomato growers would also benefit.