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 ...

Understanding the Context

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. These galls are roundish, very hard growths that surround the twig of several types of oaks ...

Key Insights

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 ... St. Louis Post-Dispatch: Leaf galls on oaks are not a concern to the tree 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? Marin Independent Journal: Oak leaves turning brown? Could be the two-horned oak gall wasp 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 ...

Gardening season is underway, and you may have questions. To ask one, simply go to the OSU Extension website, type it in and include the county where you live. A photo is very helpful. Q: Our oak tree ...