Galls on oak leaves are harmless growths caused by specific insects. They have different shapes depending on the insect species causing the gall.

Cicadas have been around for weeks in Cincinnati and Southwest Ohio. So, their time is nearly up, right? Here's when they ...

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 ...

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 balls taking space on the trees are eggs of Gall Wasps. Gall wasps are a small breed of wasps that lay their eggs in Oak and Pecan trees. Their eggs grow into the tree, leaving a hard capsule ...

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 ...

The galls are the work of the two-horned oak gall wasp, Dryocosmus dubiosus, a tiny honey-brown wasp the size of a gnat. These tiny wasps are not dangerous to humans in any way, and they do not ...

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 ...

It can be unnerving to find that the leaves of an oak or hackberry tree are as bumpy as a rock-covered seashore in late summer. Other trees’ leaves may break out in acne-like red spots or sport ...

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.