Powdery mildew is a fungal disease that affects pea plants, especially in dry seasons. The disease first appears as a white powdery growth on old leaves that later spreads to other plant parts like tendrils and pods. Symptoms include white powdery spots that increase transpiration and decrease photosynthesis, resulting in smaller, shrunken grains and yield loss. The causal organism is the fungus Erysiphe polygoni, which can survive in seeds and soil. Disease management strategies include selecting mildew-resistant varieties, removing plant debris, early sowing, seed treatment, and fungicide sprays.

1. POWDERY MILDEW OF PEA
DR. RAJBIR SINGH
Assistant Professor
Department of Plant Pathology
Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India
Affiliated to Ch. Charan Singh University, Meerut (UP), India
Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com
Cell No. 91-9456613374

2. Powdery Mildew of Pea
• All states in India where pea is grown
Symptoms
• Symptoms appear in dry season
• Firstly on old leaves and then others parts
• Formation of powder on both surface of leaves
• Later formation of powdery spots on tendrils, pod etc.
• White powder on plant surface
• Increase respiration and transpiration
• Decrease photosynthesis
• Spots on pod surface – grain small & shrinked - loss in yield

6. Casual Organism – Erysiphe polygoni
• Pathogen survive in seed as mycelium
• Soil borne – Clestothecium
• Clestothecium - germinate & form conidia
• Superficial and ectophytic
• Second spread by air

7. Disease Management
• Selection of seed
• Removal of plant debrish
• Early sowing
• Seed treatment – Captan - @ 2.0 gm/ kg seed or Contaf @ 0. 1%
• Spray- (i) . Sulfex @ 2.5 gm/litre
(ii). Calaxin @ 1gm/litre
(iii). Kerathane 48 EC @ 225 ml/ha
• Disease resistant varieties- Pusa Panna, Arka Ajeet, Hans,
Azad pea 4