Does your pin oak look like it’s breaking out in little bumps Those odd, round growths are called twig galls, and they’re ...

You could spot one or two, then dozens around the same tree. Oak galls are the result of gall wasps. Inside the galls are the insect's eggs and larvae. When the eggs are first laid, the galls will ...

Imagine how many wasps come out of a full-size laurel oak covered with galls! The eastern horned gall wasp has been around for a long time. We had a pretty severe epidemic in the mid-1990s ...

Seeing a pine pollen cone, oak catkin or sower gall once each year is enough to continue to marvel at their beauty, unique ...

They are called galls. Oak galls are caused by gall wasps, a small cynipid wasp. The female wasp lays her eggs on the tree. This irritation causes the abnormal plant growth we call a gall.

The photo I received (and is pictured here) is a woolly oak gall, stimulated by the wool sower gall wasp. This small wasp (1/8” long) is harmless to people, only lays eggs on white oak branches ...

You may be surprised by the answer! Have you ever found a woody ball like this under an oak tree? Credit: Nathalie Roy Once the little parasitic wasp reaches maturity, it burrows its way out of the ...

The galls protect the wasps from predators and provide a food source for developing larvae. There are several noticeable Callirhytis species affecting oak in the Northeast. The wool sower gall ...

Oak galls, particularly those induced by wasps such as Kokkocynips decidua and Kokkocynips rileyi, have an appendage dubbed ...