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 ... Over the past few years, we've seen quite an increase in the number of oak trees affected by oak gall.

Understanding the Context

These galls are roundish, very hard growths that surround the twig of several types of oaks ... 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 ... Have you seen those beige, 3-inch balls growing on oak trees?

Key Insights

Have you seen those red beads or pods growing on manzanita leaves? They are called galls. Oak galls are caused by gall wasps, a small ... abc13: What are oak galls, and why could there be more in Houston this fall? HOUSTON, Texas (KTRK) -- Oak galls are popping up everywhere this fall!

Final Thoughts

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 ... What are oak galls, and why could there be more in Houston this fall? 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 ...

Detroit News: Unusual growths on oak leaves are harmless galls caused by insects While walking around our property this week, I came across two interesting things going on with our pin oak trees. The first thing that caught my eye was what looked like a white grape growing from an ... Arkansas Democrat-Gazette: IN THE GARDEN: Remove galls on trees to avoid potential dieback Each year in late spring and early summer, homeowners begin noticing strange growths on the leaves or stems and are concerned for the health of their trees. Several different types of galls are common ...