Tobacco aphid
The tobacco aphid tends to form denser colonies, closer to the top of the plant, than the peach potato aphid . It is not known to what extent tobacco aphids [...] extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or [...] sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess sugar is secreted in the