Powdery Mildew on Silk

Powdery mildew is a fungal disease that affects a wide variety of plants, including mulberry leaves—the primary food source for silkworms. This disease can significantly impact silk production by reducing leaf quality and availability.

Causes

• Fungal spores from species like *Phyllactinia* or *Uncinula*
• High humidity and moderate temperatures
• Poor air circulation around plants

Symptoms

• White or grayish powdery spots on the surface of leaves
• Yellowing or browning of affected areas
• Leaf curling or drying in severe cases

Impact on Silk Production

Mulberry leaves infected with powdery mildew lose their nutritional value, which directly affects silkworm health and cocoon quality. In severe cases, it can reduce silk yield significantly.

Prevention & Control

• Ensure good spacing and air circulation between plants
• Remove and destroy infected leaves promptly
• Use resistant mulberry varieties if available
• Apply organic or chemical fungicides as needed (e.g., sulfur-based sprays)

Regular monitoring and early detection are key to managing powdery mildew in sericulture.