Foresters are using parasitoids to reduce the spread of the emerald ash borer beetle, following the lead of many states to ...

Learn about the wasps that have a gruesome but fascinating way of surviving.

When most people think of scientists discovering a new species, they think of long treks and exotic jungles, not a suburban ...

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 ...

Nearly invisible to the naked eye at just 0.2 millimeters long, oak leaf itch mites commonly feed on larvae of oak gall midge flies that live on pin oak leaves.

Cicada season may be over, but another pest emerges right after. Here's how to prevent possible bites and rashes from oak leaf itch mites.

Wool sower galls are created by a wasp, Callirhytis seminator. When they first develop, they are fuzzy, white to whitish-pink, round galls that resemble cotton balls.

Galls form when certain wasps, including species like Kokkocynips decidua and Kokkocynips rileyi, lay their eggs in oak tissues. These growths become shelters where wasp larvae develop.

The galls are filled with fibers and small seed-like capsules, which is why they are also known as oak seed galls. Each of these “seeds” contains a single wasp larva.

Wool sower galls are created by a wasp, Callirhytis seminator. When they first develop, they are fuzzy, white to whitish-pink, round galls that resemble cotton balls. The galls are filled with fibers ...