• They suck the plant sap from the stem, leaves and pods which cause reduction in yield.
• The infested leaves are wilted or curled.
• Plant stunting, reduced pod and seed counts, puckering and yellowing of leaves.

Identification of the pest

• Winged adults: Have a black head and thorax.
• Aphids: Excrete honeydew on surface of lower leaves.

Management

• Dusting of cow dung ash and spraying of clay suspension as asphyxiants (in small area and low incidence of sucking insects)
• Spray 0.05 % quinalphos 25 EC, oxydemeton methyl 25 EC, at the crop age of 35-40 days and repeat after 15 days if needed