Gonipterus scutellatus

Eucalyptus snout beetle

Description

Gonipterus scutellatus, commonly known as the eucalyptus snout beetle, is an invasive pest (beetle) species (Curculionidae) originally from Australia. It has spread to various regions around the world, including Europe. In Europe, Gonipterus scutellatus has become a significant pest in countries such as Portugal, Spain, France, Italy, and Greece. Gonipterus scutellatus was first recorded in Europe in Italy in 1976, and subsequently in France in 1978 and Spain in 1991 etc. Its presence has expanded due to the importation of eucalyptus trees and the lack of natural enemies in these new environments. The eucalyptus snout beetle is a serious pest of eucalyptus trees. Both adult beetles and their larvae feed on eucalyptus foliage. Heavy infestations can lead to severe defoliation, which significantly weakens the trees and can cause stunted growth or even tree death. In severe cases, it can lead to the death of entire stands of eucalyptus, impacting both the environment and the economy where eucalyptus is grown for timber or paper production. Efforts to manage Gonipterus scutellatus include monitoring and control programs, such as the use of biological control agents and integrated pest management strategies.

Symptom

The most noticeable symptom is the loss of leaves. Beetles and larvae consume the foliage, leaving trees with sparse or completely bare branches. Adults have a characteristic snout and feed by chewing on the leaves, causing irregular holes and notches. Larvae also feed on the leaves, creating additional damage. Prolonged defoliation can lead to stunted growth and weakened trees, making them more susceptible to other stresses and diseases.

Tree Species: Eucalyptus

Part of a plant- attacked: Leaf / Needle

Pest significance: Very harmful

Pest Category: Insects

Invasive Species: Yes

Present in EU: Yes