Aphis craccivora

Black legume aphid

Description

Aphis craccivora, known as the black legume aphid, is very polyphagous aphid species with a preference for plants in the Fabaceae family, including Robinia pseudoacacia (black locust). This species is widely distributed across Europe and other temperate and tropical regions, where it has adapted to a variety of climates. In temperate zones, it overwinters as eggs. The aphids cluster on young shoots, leaves, and flowers, where they feed by sucking plant sap, leading to reduced growth, leaf deformation, and general weakening of the host. The production of honeydew facilitates the growth of sooty mold, further reducing photosynthesis and diminishing the aesthetic value of trees and shrubs. Additionally, Aphis craccivora is a known vector of several plant viruses, which can significantly impact crop health.

Symptom

On infested trees and shrubs, young shoots and leaves are curled, stunted, or deformed. Colonies of small, dark aphids are visible, often attended by ants. Honeydew accumulates on leaves and branches, leading to the growth of dark fungal layers (sooty mold).

Tree Species: Black Locust, Peach, Cherry, Redbud, Caragana , Plum

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes