In the battle against crop diseases, the game is always changing, providing fresh challenges for farmers and plant pathologists.Plant diseases such as red crown rot in soybeans are moving into more parts of the Midwest, and last year, Extension personnel in Missouri and Oklahoma identified corn leafhopper and corn stunt disease in their states for the first time, pushed up from the South.The corn leafhopper is a tiny insect that carries pathogens that causes corn stunt disease, which can reduce