Posts Tagged ‘girdler’

A Pruner, a Girdler and a ?

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We have a dawn redwood tree in our backyard

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that my mother gave us years ago. These pictures were taken the end of November.

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I found several twigs on the ground under the tree.

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What “cut” the twigs from the tree, and how did they do it to make the end look like that?

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There are tree pruner insects. A full-grown twig pruner chews through the wood from the inside out. This leaves a smooth cut on the inside of the twig. The ragged edge results from the twig breaking.

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This broken twig resulted from a female tree girdler chewing a v-shaped groove around the twig. The small larva overwintered in the fallen twig.

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The ones off the redwood tree don’t look like the work of a girdler or a pruner.

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It will probably remain a mystery … unless I find another clue in the future.