Target Crops: Onions.
Damage
Spots on the leaves are at first small with white centres, but expand rapidly into oval, brown to purple blotches. If the blotches grow around the leaves, or merge, the parts above the blotch wilt, collapse and die.
Prevention
- Rotate out of onions for at least three years.
- Field sanitation is important; remove or plow under plant debris, and cull volunteer plants.
- Infected plant material should be buried deeply.
- Harvest in dry weather and avoid injury to the necks.
Pest & Diseases Solution
