Symptoms

• Yellowing of the entire network of veins in the leaf blade is the characteristic symptom.
• In severe infections the younger leaves turn yellow, become reduced in size and the plant is highly stunted.
• The veins of the leaves will be cleared by the virus and intervenal area becomes completely yellow or white.
• In a field, most of the plants may be diseased and the infection may start at any stage of plant growth.
• Infection restricts flowering and fruits, if formed, may be smaller and harder.
• The affected plants produce fruits with yellow or white colour and they are not fit for marketing.
• The virus is spread by whitefly.

Management

• Spray azadirachtin 0.03 WSP @ 5 g/10l or methyl demeton 25 EC @ 1.6 ml/l or thiamethoxam 25 WG @ 2 g/lit to kill the insect vector, whitefly.
• By selecting varieties resistant to yellow vein mosaic like Parbhani Kranti, Arka Abhay, Arka Anamika, and Varsha Uphar, the incidence of the disease can be minimised.
• The virus is transmitted by the whitely (Bemisia tabaci,.
• Parbhani Kranti, Janardhan, Haritha, Arka Anamika and Arka Abhay can tolerate yellow vein mosaic.
• For sowing during the summer season, when the whitefly activity is high, the susceptible varieties should be avoided.
• Synthetic pyrethroids should not be used because it will aggravate the situation.
• It can be controlled by application of Chlorpyriphos 2.5 ml + neem oil 2 ml lit of water.