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Rustic Sphinx Caterpillar Parasitized by Braconid Wasps: Biological Control in Action

The white cocoons on the caterpillar are braconid wasp pupae. Wasps lay eggs on the caterpillar; larvae consume it internally, then spin cocoons. They overwinter and emerge in spring to parasitize more caterpillars. This natural control benefits your garden—leave them alone.

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