Bruchophagus sophorae

Chalcid wasp Bruchophagus sophorae

Description

Bruchophagus sophorae is a phytophagous chalcid wasp that develops in the seeds of various Fabaceae species, primarily Styphnolobium japonicum, Sophora alopecuroides, and Cladrastis lutea. Originally described from China, it has since spread widely across Europe, with records from Serbia, Slovakia, Bulgaria, Hungary, Romania, Germany, Ukraine, Georgia, France, Turkey, and Kazakhstan.

The larvae feed inside seeds, causing significant damage to seed viability. In some regions, infestation rates can reach up to 97%, severely reducing natural regeneration of host plants. Affected trees may experience lower seed production over time, which can impact population sustainability. Although the damage is primarily economic and reproductive rather than aesthetic, repeated high infestations can contribute to reduced species abundance in certain habitats.

Symptom

Infested seeds show internal damage, often appearing hollow or deformed. The exit holes left by emerging adult wasps are visible on the seed surface. Severe infestations can result in poor seed germination and reduced reproductive success.

Tree Species: Yellowwood, Sophora

Part of a plant- attacked: Fruit / Seed

Pest significance: Harmful

Pest Category: Insects

Invasive Species: Yes

Present in EU: Yes