TUBER VEGETABLES :: MINOR PESTS :: LEAFHOPPERS

7.Aphids: Aphis gossypii, Myzus persicae, Lipaphis erysimi and Brevicoryne brassicae (Aphididae: Hemiptera)

Damage symptoms
Colonies of nymphs and adults are seen on ventral surface of leaves and shoots and suck sap there from. Infested leaves become yellowish, wrinkled and cupped, while, tender shoots turn yellowish and die away. They also excrete honeydew on which sooty mould develops covering affected parts with a thin superficial black coating that hinders photosynthetic activity of leaves resulting in stunted growth of plants. In addition, they also act as vectors, for transmitting several viral diseases.