Field Diagnostic Symptoms

• Small, brown, water soaked, circular spots with yellow halo on leaves.
• Defoliation of older leaves.
• Small, water-soaked spots on green fruit .
• Centre of spots become irregular, light brown with sunken and scabby surface.

Symptoms on leaves

Causal organism

• Xanthomonas axonopodis pv. vesicatoria (ex Doidge) Vauterin

Survival and Mode of Spread

Survival :

• Infected debris

Primary spread:

• Infected plant debris and seed

Secondary spread:

• Rain splash

Favourable conditions :

• Moist weather and splattering rains
• High humidity or persistent dew.

Integrated Disease Management:

• Use of disease free seed
• Spray Streptocycline 40-100 ppm (20 g/ac)

Source of Information

Acknowledgement