What are parasitoid wasps? Learn about these 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 ...

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

The wasps come out of a “microhabitat” of “tumorlike growths” made by a gall wasp species that lives on oak leaves on the campus, according to the news release.

The citrus gall wasp is an Australian native insect originally from northern NSW and Queensland but is now established in most Perth suburbs after spreading across the country.

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 around it, which the larvae inside will eventually eat.

Adult gall wasps will inject a chemical into the leaf buds as they're forming, and these little green balls form in that spot, providing us with these funky-looking mini-apples.

The two-horned oak gall wasp is just one of dozens of species of gall wasps that incubate their eggs in oak leaves.

The acorn pip gall wasp, like other gall wasps, is tiny (2 to 3mm) and has a complex life cycle which takes two years to complete and comprises two alternating generations.

Rose gall wasps are significantly smaller than your standard paper wasp. It overwinters as a larva in a gall made by an adult parent in the previous spring/summer.

A second biological control agent is moving closer to entering the battle against the erythrina gall wasp to enhance survival of endemic wiliwili trees across Hawaii. Releasing the parasitoid will ...