Potato aphid
yield. Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The [...] these days distributed throughout the world. It is a highly polyphagous species with a preference for Solanaceae (particularly potato), but has also been [...] growth hormones. As a result, the plant’s growth is retarded giving rise to deformed leaves or, if the infestation occurs early enough in the season, the death