How to Manage Pests
UC Pest Management Guidelines
Take a fruit damage sample in mid-July to assess the effectiveness of the current year's IPM program and to determine the needs of next year's program. Fruit damaged by peach twig borer drops from the tree before harvest and would be missed in a later sample.
Randomly examine 1000 fresh fruit (40 fruit on 25 trees) for damage. These fruit could be picked from the tree or examined on the tree. Be sure to look high in the tree, especially on the south side. It takes about 15 minutes to examine 1000 fruit.
Examine fruit for damage from:
Record on a monitoring form the number of fruit infested by larvae, type of larvae present or, if there are no larvae present, whether damage is surface feeding only or if the larvae penetrated the fruit. Record the number of fruit with live San Jose scale or parasitized San Jose scale as well as those with signs of brown rot.
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UC IPM Pest Management Guidelines: Prune