Walnut husk fly

Biological control treatment for walnut husk fly

The walnut husk fly, also known as the walnut fly (Rhagoletis completa), is a pest insect that affects walnut trees. Native to North America, this fly has also been introduced to Europe. The female lays her eggs on still-green walnuts, and the larvae develop inside the fruit by feeding on the flesh. This can lead to deformities, galls, and deterioration of the walnuts. The walnut husk fly is a problem for walnut producers, and various methods, including biological approaches and the use of traps, are used to control this infestation.