Corn
Diseases in Ohio
Anthracnose
- Symptoms
- leaf spots are oval
to elongate, tan and 1/4 to 3/4 in. long
- may have brown or
orangish borders
- on resistant hybrids,
lesions are smaller and yellow to brown in color
- spore bodies with
black spines can be seen with hand lens.
- Environment
- favored by normal
to above rainfall and moderate to warm temperatures (80 to 85F)
- Survival
- fungus survives
on corn residues and spores are spread by splashing rain
- Management
- resistant hybrids.
- crop rotation.
- clean plowdown of
corn residues
- balanced soil fertility.
- Scouting
