To save oak trees, UC Cooperative Extension is organizing a GSOB Blitz, a community-powered effort to detect and map goldspotted oak borer infestations, in June.

Noticing leaves on the ground under ash and maple trees causes us to look up into the trees where spots are seen on the ...

They're the tiny, fuzzy yellow or brown balls on oak leaves and branches. You could spot one or two, then dozens around the same tree. Oak galls are the result of gall wasps. Inside the galls are ...

Texas A&M Forest Service offers assistance to help Texas landowners stop oak wilt spread through the Texas Oak Wilt Suppression Program.

Leaf-feeding insects are a part of life in the Peninsula's rich horticultural landscape. The region's mild Mediterranean ...

This old oak tree has been growing here for hundreds of years. It stands here in all weathers getting bigger and bigger. Every autumn, the leaves drop off and oak trees become bare. This doesn't ...