Mediterranean oak borers were first identified in the city of Sacramento last July. They target oaks native to Sacramento, ...

Oak leaf pocket gall shows up on the underside of a leaf as long, raised areas that follow the leaf veins and distort the leaves. Right now, the galls are soft and green but will eventually harden ...

Leaf tatters most often appear in white oaks, which also include bur and swamp white, and others of Iowa’s 13 oak species. Hackberry trees can also be affected.

Douglas Tallamy, in his book “Bringing Nature Home,” claims that an oak tree supports over 4,000 different species of insects and animals, more than any other tree.

Oak leaf itch mites — tiny eight-legged creatures that feed on insects in the tree canopy — drop from oak leaves in late summer and fall. The mites have been known to bite humans when they ...

Other insect populations also are declining at that time. The mites have less food in the oak tree. Some pregnant females will stay in oak leaves to spend the winter.

There are over 200 insects that cause oak galls including midges, mites, aphids, flies, and wasps. The undisputed champs of oak galls are a big family of little wasps called Cynipids.

QUESTION: What are the fluffy beige balls attached to the oak leaves that are falling this year?-- Bob. ANSWER: It is an insect infestation called wooly oak gall. The tiny insects infest some of ...

Like last year, we are seeing a high number of vein pocket gall on pin oak leaves, which causes abnormal swelling of the leaf near the veins. And, unfortunately, there are no easy fixes.

When holes appear in tree leaves, insects are often the first to be blamed. But don’t be in too big of a hurry to reach for an insecticide spray. There are other causes that need to be checked ...

Purdue Landscape Report: Each spring the PPDL receives several samples of oak trees showing curled, twisted, stunted and/or generally ratty looking leaves.When there are holes in the leaves or leaf ...