Plant parts affected

Leaves, stems, terminal buds

Initial diagnosis:

Pea aphids suck the sap on the upper leaves, stems and terminal buds of their host plants.

Symptoms:

The tops of infested plants have small leaves and spindly stems. Secretion of honeydew can cause secondary fungal growth.

Damage type:

Heavy infestations can result in deformed leaves, wilting and yellowing, stunted plant growth, leaf curling and leaf drop, and reduced dry matter production.