3) The Huge Loss of Yield in Crops due to Diseases and pests 1840-1845: Potato late blight in ireland 1970: E pidemic of maize leaf blight in USA 1950: Wheat yellow rust in China Whole World: 28-36billion USD in total 23-30 billion USD in Disease loss Leistinger, 1998, Loss per year in rice: 40mil Tons by fungal diseases; 26mil Tons by insects; 10mil. Tons by vIruses In China: 10-20% of the total yield of production(3) The Huge Loss of Yield in Crops Due to Diseases and Pests • 1840-1845: Potato late blight in Ireland • 1970: Epidemic of maize leaf blight in USA • 1950: Wheat yellow rust in China • Whole World: 28-36billion USD in total 23-30 billion USD in Disease loss • Leistinger, 1998, Loss per year in rice: 40mil. Tons by fungal diseases; 26mil. Tons by insects; 10mil. Tons by viruses) • In China: 10-20% of the total yield of production