Field assessment of resistance in potato to Phytophthora infestans

Late blight, caused by the oomycete Phytophthora infestans (Mont.) de Bary, is the main biotic constraint to potato production worldwide. The present guide is designed to assist professionals and technicians in charge of evaluation trials designed to screen selected potato genotypes for resistance to this disease. The evaluation of breeding families, which is carried out under greenhouse or field conditions, can use the same methodology. The guide can help to organize trials, improve data collection and analysis and introduces new criteria for resistance measurement based on epidemiological principles. The International Potato Center (CIP) staff can share their late blight trial data through to the Global Trial Data Management System.

Update: How to Control Potato Late Blight by Using Fungicides Correctly | Using a new tool, small-scale farmers can now know what kind of fungicide to use and when and how often to apply it. More at https://bit.ly/2ErG4UQ

Forbes, G.; Pérez, W.; Andrade Piedra, J. 2014. Field assessment of resistance in potato to Phytophthora infestans. Lima (Peru). International Potato Center (CIP). 35 p. © 2014. International Potato Center

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