1. Yellowing of the entire network of veins in the leaf blade (vein clearing) is the characteristic symptom. In severe infections the younger leaves turn yellow, become reduced in size and the plant is highly stunted.
2. In a field, most of the plants may be diseased and the infection may start at any stage of plant growth
3. Infection restricts flowering and fruits are not formed, if formed, turn smaller, harder and rough. Loss in fruit yield ranges from 50-100% based on disease incidence

1. Tolerant varieties: Parbhani Kranti, Pusa savani, Janardhan, Haritha, Arka Anamika and Arka Abhay
2. Removal and destruction of infected volunteer plants and collateral hosts in the vicinity of the field
3. Erection of yellow sticky traps in the field to trap the whiteflies
4. Vector management for restricting spread by spraying systemic insecticides like Monocrotophos, 1.5 ml/l, Dimethoate or Methyl S Demetan 2 ml/l

1. C. malayensis causes brown, irregular spots and C. abelmoschi causes sooty black, angular spots on lower surface of leaves.
2.Both the leaf spots cause severe defoliation and are common during humid season

1.Field sanitation to the extent possible
2.Spray Mancozeb or Zineb 0.2% or Carbendazim 0.1% at fortnightly intervals based on disease incidence and severity

1.Grayish powdery growth occurs on the under as well as on the upper surface of the leaf
2.Affected leaves turn yellow and drop off leading to severe yield loss

1.Field sanitation to the extent possible
2.Dust finely ground sulphur at 30 kg/ha or spray Wettable sulphur 0.3% or Dinocap 0.2% ,three to four times at 15 days interval