We have had numerous calls and samples about funny looking "bumps" on the leaves of oak trees. These growths are known as galls, and alarming as they may seem, they do not injure the plant. Galls are ...

Galls cause worry for tree owners each year, but in truth, most of these odd-shaped growths are more of a curiosity than a concern. This is the time of year people frequently begin to notice galls on ...

As mentioned in the previous garden update, galls that form on tree leaves rarely cause much in the way of tree stress. But there are also galls that form on other parts of trees. In most cases, gall ...

CUTLINES - Q: My pin oak tree has lumpy growth on the limbs that someone said were galls. What should I do about this? I don't want to lose my tree. C. B. TulsaA: Oak tree galls come in many forms, ...

Fuzzy orange galls like this are common on oak leaves. They are caused by the leaf's reaction to a tiny wasp egg. Credit: Courtesy of Terri Umble This story was originally published in September 2020.

DEAR GARDEN COACH: Help! I recently discovered these crazy looking things on the leaves of my valley oak tree. I am wondering what is wrong, and what can I do to get rid of them? I know the tree is ...

ST. LOUIS – A giant force of nature is vulnerable to a minuscule wasp, capable of destroying it. This is the conflict between the oak tree and the oak gall. An oak gall wasp lays its eggs on the oak ...

The relationships that have evolved between plants and animals over many millennia of time spent coexisting are often as interesting as they are vast and varied. From the production of nectar and ...

Those valley oak trees (Quercus lobata) in California's Central Valley have a lot of gall. Scientists Ian Pearse, Maxwell Joseph and Melanie Gentles of the UC Davis Department of Entomology knew that ...

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Something I've had a lot of questions about lately is wasps. Specifically, wasps that are flying around trees in large numbers. One of the things that I wonder when somebody asks me about wasps is, ...

Galls cause worry for tree owners each year, but in truth, most of these odd-shaped growths are more of a curiosity than concern. Galls have long been a part of tree life in Missouri and elsewhere in ...