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 ...

The horned oak gall forms on twigs of Quercus palustris Muench. and is initiated when the wasp Callirhytis cornigera O.S. oviposits into the periderm or cortex of the twigs. Injury to phellogen as a ...

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 ...

Many years ago, someone famously asked Calvin Coolidge, “Mr. President, do you think it will ever stop raining?” Coolidge replied, “Well, it always has.” I hope Silent Cal was right. Several folks ...

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 ...

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 ...

Galls are structures made up of plant tissue, forming in response to the saliva of mites or small insects as they feed. The number and variety of galls found on trees in our landscapes are closely ...

Steve Nix is a member of the Society of American Foresters and a former forest resources analyst for the state of Alabama. Trees are among the earth's most useful and beautiful products of nature.

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, ...

You’re admiring the stalwart limbs and sculpted leaves of your handsome oak tree, and suddenly you see them: warty bulges clustered along the branches like bunches of freaky grapes. There’s no need to ...

‘I have some weird, seemingly hollow, green, round balls falling from my oak tree. What in the world are these things?” — S.Y. You are describing an interesting growth that can occur on a variety of ...

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 ...