
Corn
Diseases in Ohio
Stewart's
bacterial wilt and leaf blight
- Symptoms
- leaf lesions are
long, irregular in shape with wavy margins that have parallel veins and
are yellow to pale brown in color
- streaks may extend
length of leaf
- Environment
- severe disease can
be expected when the mean temperature for December, January and February
is above 30 to 38°F
- cold winters (mean
<32F) reduce flea beetle populations
- Transmission
- corn flea beetle
feeding on leaves
- bacterium overwinters
in the beetle
- Management
- resistant hybrids
- seed applied insecticide
to control flea beetle may be helpful
- Scouting


