Aphids Aphids Aphids or lice as they are commonly called feed on tobacco by sucking the sap from the leaves. They are generally found on the lower surface of the leaves where they multiply extremely fast under favorable conditions. Mostly they have their young alive but at times may lay eggs. At times winged forms may appear and fly or drift in air currents. This probably explains their sometimes rapid spread from field to field.
Aphids secrete a sticky material called honeydew as they feed.
This damage makes the tobacco leaf practically worthless. Many generations are produced each year.