Plant lice are small, soft-bodied, sucking insects found on a large number of vegetable crops. The aphids, by sucking the sap, cause leaves and shoots to become distorted, curled, and weakened.
Generations are numerous, and the rate of increase is tremendous. Young are often born rather than hatched from eggs. Plant lice injure vegetables more during cooler periods; in warm weather they are usually checked by natural enemies.
