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