Stewart's Wilt and Leaf Blight

Pantoea stewartii

Corn seedling affected by Stewart's wilt
Corn seedling affected by Stewart's wilt. Photo courtesy of Mary Ann Hansen. Licensed under CC BY 3.0.
Stewart's wilt is a bacterial disease which affects corn. It overwinters inside the gut of corn flea beetles so its severity is linked to their survival and presence. Stewart's wilt causes damage at both the seedling and later stages and can cause significant yield losses.
Plants are stunted and leaves may wither and die depending on susceptibility.
Leaves have white lessions that are long and irregularly shaped.
There are no effective curative treatments for Stewart's wilt. Control efforts should instead be focused on the corn flea beetle which is the primary vector for this disease. Always read and follow all label instructions.