Risk and Management of Goss’s Wilt of Corn

University of Minnesota/Dean Malvick

Although corn producers in Minnesota have historically had few significant problems with
leaf diseases, this has changed recently with the emergence of Goss’s leaf blight and wilt. Goss’s wilt is now known to be widespread in corn fields across the state and, thus, more inoculum is available than ever to increase the risk of this disease, which can greatly reduce yields.

Management of Goss’s wilt is based on genetic resistance, although crop rotation and tillage may also be important. However, these practices have not prevented yield loss in all elds, and there is a paucity of information available upon which to improve and tailor management practices for Minnesota for the short and long term.

This research will look to determine if there is pathogenic variability in the populations of the Goss’s wilt pathogen that threatens durability of resistant hybrids. It will also endeavor to determine which factors influence survival and spread of the Goss’s wilt pathogen in a field and area.