Disease

Symptoms

Fungicide

Method of application/ Control Measures

Name:-

Late Blight (Phytophthora infestans)

Source: - Aerial spread of spores.

Favoring Conditions High free moisture or humidity and warm 70-85^o. Constant high humidity is the key to serious infections. Spreads very rapidly. Critical Crop Time Emergence to immediate pre- harvest.

Overall Plant: - Gray to brown to black leaf scorch. Burnt appearance. Also can be seen on stems and fruit.

Leaf: - Tips to mid leaf with milky gray to brown collapse. Active infections have gray spores on underside.

Stem: -. Stem sections milky brown to black, not in contact with soil. Confused with P. capsici which attacks stems near the soil.

Root and fruit: - brown, wrinkled leathery lesions. Disease Source In California, aerial spread of spores.

Ridomil, Maneb or Mancozeb (@ 0.2%)

Foliar spray Full plant coverage essential.

Removal of infected plant materials, crop rotation, use of healthy seeds are important for checking the disease.