The two-horned oak gall wasp is just one of dozens of species of gall wasps that incubate their eggs in oak leaves. Skip to content. All Sections. Subscribe Now. 70°F. Sunday, June 8th 2025 ...

I’ll be on the lookout for more oak galls and hope to find additional varieties created by the fascinating oak gall wasp. The wool sower oak gall she found is now on my back porch. I put it in a cup ...

Q • My oak trees have more large galls than I’ve ever seen on them, and I’m worried about their health. What can I do about ...

Hugo’s father, Andrew Deans, a professor of entomology at Penn State, identified the objects as oak galls – abnormal plant ...

I said the wasp produces the galls, but in reality, it’s the oak that produces them. Here’s what happens: One of these very small wasps bores a tiny hole in the tree bark or, more commonly, in ...

Oak gall wasps are barely visible at 2 millimeters in length, which is about the thickness of a half-dollar coin. The wasp’s petite size notwithstanding it is responsible for individual galls ...

There are over 200 insects that cause oak galls including midges, mites, aphids, flies, and wasps. The undisputed champs of oak galls are a big family of little wasps called Cynipids.

The oak apple wasp is responsible for the spherical, spongy-filled galls on red oaks. Galls are generally harmless, and treatment is not really necessary. But affected foliage may drop early.

Jumping Jehoshaphat! The ground is alive! Or so it seems when hundreds of tiny round spheres the size of a pin head are hopping around on the sidewalk. This spring there are plenty of these ...

Galls are abnormal, tumor-like growths on oak trees created by gall wasps as a shelter for their larvae. Once the gall wasp larvae become adults, they eat their way out of the gall and fly away.

Over the past year, oak crypt gall wasps have slowly killed vast swaths of black oaks from Providence to Provincetown, and University of Massachusetts Amherst entomology professor Joe Elkinton has ...

The eastern horned gall wasp has been around for a long time. We had a pretty severe epidemic in the mid-1990s, and local residents told me back then that another one occurred in 1984 in south ...