Gall Wasp

Gall Wasp

Gall Wasp Information


There are many different species of Gall Wasps, estimations of more than 600 of them.  Generally, they are an insect that appears to have a hunchback shape, and most of the Gall Wasps are about ¼” in length.  Their abdomens are usually oval in shape, and appear to be shiny and dark.  They also have segmented bodies.

Gall Wasp

Location and Behavior Patterns: 

Gall Wasps are attracted to many different types of plants and trees.  The majority of them are attracted to oak trees, but they can also be seen on roses, willow trees, and aster trees, among others.  They are sometimes referred to as Gallflies. 

The Gall Wasp will induce galls onto plants, in order to have a place for larvae development.  The galls will vary in size, depending on the type of host plant, as well as on the type of Gall Wasp that is involved.  Many Gall wasps can affect the same plant or tree.


Insecticides are effective for treating Gall Wasps , Mites etc.  Additional things that can be done to limit the number of Gall Wasps around, is to prune the parts of the plant or tree that has been affected, as well as limiting the amount of fertilizer that is applied to any given plant or tree.

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