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Almond - Peach Twig Borer

Direct copy from UC IPM website to word document Statewide IPM Program, Agriculture and Natural Resources, University of California All contents copyright © 2009 The Regents of the University of California. All rights reserved. Peach twig borer is a major pest in several tree crops. Adult moths have steel gray mottled forewings. Females lay eggs on twigs, fruit, and leaves. Eggs hatch in 4 to 18 days. Larvae are small, brown caterpillars with white intersegmental bands and a black head capsule. They go through four to five instars. Overwintering larvae are sheltered in tiny cells (hibernacula) that they bore under the bark of limb crotches on 1- to 4-year-old wood or in bark cracks on larger limbs and the trunk. Pupae are dark brown, without a cocoon and are found in tree crevices, between hull and shell, curled leaves, or in debris on the ground. There are four generations per year.

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