Abstract:Studies on the pathogens of stalk rot of corn in China and USAwere carried out in 1986.In China,139 samples were isolated.Ofthem,68.3% were Pythium,35.3% were Fusarium,4.3% were Rhi-zoctonia,2.2% were Bacteria,4.3% were Helminthosporium.In Amer-ican,60 sa