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Sep 25, If the oak branches that are falling have green leaves on them, you are most likely seeing the result of squirrel nest building activity.

The symptoms consist of white, powdery growth on both leaf surfaces.

Normally this is more common in early summer and/or early winter. That it might be occurring now is a bit unexpected. They are dropping clumps of leaves like crazy. I’d love to get back to gardening instead of picking leaves out of shrubs and flowers! A: It’s nothing to worry about.

The same thing happens to crapemyrtles.

Scales are not easily controlled with chemical insecticides once the adults are protected by their waxy covering.

Simply put, the oak is discarding weakly attached twigs at the ends of branches. The good news is that this reduces the acorn crop, so you won’t be as much occupied with grubbing them and their. Jul 08, I live in Aurora, CO The three large oak trees in my front yard (approximately 30 years old) are losing green leaves in clumps this summer.

In the last week the trees are producing and dropping lots of sap. Neither of these activities have happened in the last 6 years we have lived in the house. I have raked 2 large bags of leaves three times in the last month. Jul 11, The twig pruner cuts through the twig from the inside, but leaves the bark intact. For a short time the injured branch remains on the tree, but eventually succumbs to the wind, breaks off and falls from the tree. A small oval shaped hole in the end of the branch is a tell-tale sign of the twig stumpmulching.barted Reading Time: 3 mins.

Oak leaf blister Taphrina caerulescens. Heavy infestation will cause leaf to curl after the blisters have merged together; Raised blister-like leaf spots; appear sunken from the underside of the leaf; Leaf blisters are initially pale green to orange, but turn brown with age; Blister areas range from 1/16 to 1/2 inch in length; Leaves do not dropImages.