
Soybean
Diseases in Ohio
Bacterial
Pustules
- Symptoms
- pale green spots
on leaves with elevated centers which vary from specks to large mottled
areas, turn necrotic with age
- leaves become ragged
- Environment
- wet or rainy conditions
and warm temperatures (86-92°F)
- Survival
- overwinters in seeds,
surface crop residue, wheat roots and some weeds
- spreads by splashing
water or wind blown rain
- spreads during cultivation
when foliage is wet
- Management
- resistant varieties
- plant healthy, pathogen
free seed
- rotate soybeans
with other non-host crops
- plow down crop residue
when disease incidence is high
- for organic crop
production, do not cultivate when foliage is wet
