Factsheet Potato Late Blight, Negative prognosis

Author: M. van Werven
Country: All
Posted on: January 16, 2023
Document type: Publications
Potato late blight, caused by Phytophthora infestans causes severe damage to the foliage and can infect the tubers at harvest. The model uses weather data to estimate the 'epidemic free' period ('negative prognosis') by calculating the accumulated blight risk from the date of crop emergence. The model guides the first spray timing at the end of the 'epidemic free' period.