Quantification of Factors Influencing Potato Late Blight Suppression and Selection for Metalaxyl Resistance inPhytophthora infestans: A Simulation Approach

A computer simulation model was validated and used to evaluate strategies for management of potato late blight and resistance in Phytophthora infestans to the systemic fungicide metalaxyl. Subjects investigated included the frequency of metalaxyl applications (same total dosage per season), comparison of mixtures of metalaxyl and the protectant chlorothalonil versus alternations of the two fungicides, dosages of component fungicides in a mixture, timing for a limited number of metalaxyl applications, use of host resistance, and pathogen fitness (...)