Hundreds of species of small wasps called gall wasps live in the forests of North America. Hundreds more species of them are spread worldwide. In Southeast Missouri oak trees are a favorite host plant ...

While walking to the mailbox one sunny morning I saw odd-looking spheres hanging from one of the young white oaks. About the size of golf balls, they were white with a few brown spots and fuzzy.

Persisting in the winter months as ball-shaped shells on oak trees, galls, which are considered an eyesore by landscapers in the summer months, appear as a sort of curiosity in winter. What are these ...

Eucalyptus gall wasps, particularly the invasive Leptocybe invasa, present a serious threat to forestry and ecosystem health worldwide. These wasps induce the formation of specialised galls on ...

Q. My oak tree has these marble-sized growths on some of the limbs which I am told are galls. What can I do about them? A. Nature creates many amazing things, and plant galls are among the most unique ...