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 ...

Q.: I have six 90-foot tall oaks in my yard. As the leaves fell, I see that many are covered with tiny button-shaped things. It seems worse with the white oak rather than the red oak. Earlier in the ...

DEAR JOAN: There has been much discussion on Nextdoor about oak galls lately, mostly about how the galls are harmless to the tree and that they’re quite prevalent this year on oak trees around ...

Q: My red oak is about 10 years old. Some of the leaves are starting to look distressed, so I looked closely. I noticed small red ants climbing up and down the trunk, almost as if they are harvesting ...

It is the height of irony: mighty oaks being killed by tiny wasps. Oak trees in Southern Illinois -- specifically trees in the red oak family -- are being killed by galls. The galls are the result of ...

I have two red oak trees in my front yard that are about 10 years old. One of the trees started to look unhealthy last year. The lower leaves are curled, and it doesn't seem to be growing as much as ...

Plenty of animals build their homes in oak trees. But some very teeny, tricky insects make the tree do all the work. “What nerve!” you might say. What … gall! And you’d be right. Oak galls are caused ...

Q: What are these red fluffy balls that are ALL OVER my oak trees and raining down on my house and patio? Are they doing to hurt my trees? A: They are insects, but they are no harm to you or your oak ...

Q: I noticed little fuzzy balls attached to some fallen oak leaves. Also, I keep picking up brown marble-size balls in the yard. They are not acorns. Do you know what they are? A: Odds are what's ...

Q: The oaks in our neighborhood have some type of gall or insect egg case under each leaf. It is about the size of a pencil eraser and is fuzzy tan. Should we be concerned? - B.S., Houston A: It ...

Earlier this month my colleague, LyAnn Graff, brought in an interesting looking fuzz ball surrounding a thin leafy branch of a burr oak tree. It was about the size of a golf ball, but with red-tipped ...

One foolproof hiking strategy to keep young spirits up and prevent the “are we there yet?” syndrome is to turn your walk into a treasure hunt. And few treasures are so perfectly huntable in Sonoma ...