Bean Powdery Mildew:Erysiphe polygonii
Symptom:
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Leaves are covered with patches of a whitish to greyish powdery growth. This disease is caused by the fungusErysiphe polygonii.
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New growth appears contorted, curled or dwarfed and may turn yellow and drop. Pods are dwarfed and distorted.
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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 the same cropping for 3 to 3 years in the same area.
- When the disease is first noticed, sprays or dusts sulphur. Do not use sulphur on young plants.
Source-
- TamilNadu Agritech Portal
