Aphids
leaves, stems, and flowers by piercing the plant tissue and sucking out the sap. This can result in stunted growth, curling or distortion of the leaves, yellowing [...] on the species, aphids can inflict various types of damage to a crop: Nymphs and adults extract nutrients from the plant and disturb the balance of growth [...] in order to get sufficient protein. As a consequence, the excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black