Many coast live oak (Quercus agrifolia) trees are showing unusual browning in their canopies in the last month or two. If you look carefully, you may see small, crescent-shaped galls forming on the ...

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 ...

DEAR JOAN: There has been much discussion on Nextdoor about oak galls lately, mostly about how the galls are harmless to the tree and that they’re quite prevalent this year on oak trees around ...