Diseases of fruit plantation medicinal and aromatic crops (2+1)

Powdery wildew of peach

Powdery mildew of peach

Causal organism:Sphaerotheca pannosa var. persicae.
Symptoms


• Whitish powdery growth of fungus appear on leaves, young shoots and fruits.
• The young leaves are coated with a thick layer of mycelium and as a result they become narrow and curled.
• Terminal portion of the shoot is covered by white powdery mass.
• White powdery growth later turns in to pinkish and finally dark brown in colour.
• Epicarp of fruit becomes leathery and hard.

Source of inoculum


• Primary source of inoculum: Dormant mycelia
• Secondary source of inoculum: Air borne conidia.

Management


• Use of resistance varieties like .
• Cut and burn the affected plant parts.
• Spraying with sulphur compounds like