Content tagged with "branch flagging"

Branch Flagging

Branch flagging on chinquapin oak
Branch flagging on chinquapin oak. More

Branch Flagging Slide Show

Photo of tree-branch flagging
This tree displays branch flagging, which can have many causes. In this case, female periodical cicadas cut the tree's twigs with their ovipositors in the process of laying their eggs. The small cuts weakened the twigs, which turned brown, then broke during strong winds. More

Broken Twig Syndrome?

Photo of tree-branch flagging
Have you found yourself picking up broken tree branch tips from your lawn recently, only to find your lawn cluttered with them again the next day? More
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Brown patches in trees may be result of cicadas, scale insects

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Branch flagging on chinquapin oak
Egg-laying and feeding behavior of these insects damages individual tree branches. More

Fallen Flagged Branch

Photo of fallen brown tree branch
Weakened by female periodical cicadas depositing their eggs, these brown branches fell during high winds. More

Female Cicadas Cause Branch Flagging

Photo shows female periodical cicada cutting slits along a tree branch
Female periodical cicadas make small cuts along twigs and deposit their eggs in the slits, which look like a kind of “zipper line” on the twig. Winds break the weakened twigs, and litter yards with small branches. On mature, vigorous trees, the cicada-caused wounds will heal, and branches will continue growing. More

Kermes Scales on Oak

Kermes scales are not your typical-looking insects. They are tan to reddish brown spheres up to 1/4-inch diameter and attach to twigs in the oak family, especially post oaks. More

Tree-Branch Flagging

Photo of tree-branch flagging
Insects, diseases or weather-related injury can cause branches to break and droop. Learn how to identify the causes and what you can do to treat it. More

Twig Girdler Cuts

These twigs show evidence of twig girdlers. To deposit her eggs, the adult female first chews a V-shaped groove around a twig, girdling it, and then inserts eggs in the bark toward the end of the branch. Winds eventually break twigs at the cut. More

Twig Pruners Damage

Photo shows twig cut by twig pruner larvae
Among twig pruners, it is the larvae that make the most damaging cut. Twig pruner female adults deposit eggs near a twig tip, and larvae tunnel inside the branch toward its base. When larvae are full-grown, they cut through all the wood at one place inside the twig, leaving only the outer bark intact. The branch eventually breaks at that point. More