Symptoms
| Powdery Mildew: Erysiphe polygonii Symptoms Leaves are covered with patches of a whitish to grayish powdery growth. This disease is caused by the fungus Erysiphe polygonii . New growth appears contorted, curled or dwarfed and may turn yellow and drop. Pods are dwarfed and distorted. This is mostly a problem on fall beans. Powdery mildew is spread by wind and rain. Management Avoid closer spacing by providing proper spacing between the crops. Remove and destroy all the debris after harvesting Avoid same cropping for 3 to 3 years in same area. When the disease is first noticed, sprays or dusts sulfur. Do not use sulfur on young plants. |
- Leaves are covered with patches of a whitish to grayish powdery growth. This disease is caused by the fungus Erysiphe polygonii .
- New growth appears contorted, curled or dwarfed and may turn yellow and drop. Pods are dwarfed and distorted.
- This is mostly a problem on fall beans. Powdery mildew is spread by wind and rain.
Management
- Avoid closer spacing by providing proper spacing between the crops.
- Remove and destroy all the debris after harvesting
- Avoid same cropping for 3 to 3 years in same area.
- When the disease is first noticed, sprays or dusts sulfur. Do not use sulfur on young plants.