Field Diagnostic Symptoms

• Irregular, bright yellow blotches with yellow halo appear on leaves.
• Abundant white sporulation in the infected area of leaves

Symptoms on leaves

Causal agent

• –Leveillula taurica (Oidiopsis sicula) Oidiopsis type

Pathogen characters :

• Hyaline and septate, endophytic

Sexual spores :

• Ascospores in ascocarp (Chasmothecium)

Survival and Mode of Spread

Survival :

• Obligate parasite

Primary spread:

• Infected debris

Secondary spread:

• Wind

Favourable conditions

• Warm and dry weatherC

Integrated Disease Management

• Field sanitation
• Spray Propiconazole 25% EC @200 ml/ac
• Seed treatment with Bacillus subtilis @ 10 g/kg seeds

Source of Information

• https:www.apsnet.org
• Crop production guide – Horticulture 2020.

Acknowledgement