Corn
Diseases in Ohio
Yellow Leaf Blight
- Symptoms
- leaf spots are oval
to elongate, tan and 1/4 x 1/4 to 3/4 in. buff to tan colored, often with
darker border
- dark specks (pycnidia)
can be detected in the lesion center with a hand lens
- Environment
- favored by cool,
wet weather
- disease is more
common in no-till fields with continuous corn
- Survival
- fungus survives
on corn residues and some grassy weeds
- spore are spread
by wind or splashing rain
- Management
- resistant hybrids
- clean plowdown of
corn residues
- crop rotation
- good weed control
