Symptoms of chestnut gall wasp

The adult is 2.5 to 3 mm long. The body is black and the legs and the base of the antennae are yellow.

The cypher induces galls, mainly on the leaves, causing their deformation (called galls) (Figure 1), but also a decrease of the leaf surface and defoliation (Figure 2).

The galls are formed by the secretion of toxins by the cypher larvae.

They cause deformation of the infected leaves, decrease of the leaf surface and disturb flowering and fruiting, which can lead to up to 80% yield loss.