Chestnut Gall Wasp vs Forest Barklouse

Side-by-side species comparison

Attribute Chestnut Gall Wasp Forest Barklouse
Scientific Name Dryocosmus kuriphilus Caecilius fuscopterus
Order Hymenoptera Psocoptera
Family Cynipidae Caeciliusidae
Size 2.5–3 mm 2-3 mm
Habitat Orchards Woodlands
Diet Herbivores Herbivores
Regions East Asia, Europe, North America Europe
Conservation Not Evaluated Least Concern

Chestnut Gall Wasp

An invasive gall wasp from China that is the most damaging pest of chestnut trees worldwide. It induces galls on buds and leaves, reducing nut yields.

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Did You Know?

It reproduces entirely through parthenogenesis; no males have ever been found in any population.

Forest Barklouse

A common bark louse found on the bark and foliage of trees across Europe. It has distinctive dark-bordered wings.

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Did You Know?

It is frequently found on evergreen trees and shrubs in gardens.