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Almond - Tree Borers

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. Prune limb borer and American plum borer are sporadic pests in young almond orchards. They occur from Tehama to Merced counties on all major almond cultivars, but mostly on Carmel, Sonora, and Price. They have gray forewings with brown and black marks and have a wingspan of about 0.75 inch. They overwinter in a cocoon within the tree. Adult moths emerge in April and May. The mature larva is about 1 inch long with a dull white or pinkish body. Females lay eggs near pruning wounds, in scaffold crotches of young trees, near graft unions or on crown galls.

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