The first defense against borers is to maintain healthy, vigorous growth on peach trees. Do a good job of pruning, keep trees watered as needed, and control peach leaf curl (see http://hnr.k-state.edu/extension/info-center/common-pestproblems/common-pest-problem-new/Peach%20Leaf%20 Curl%20and%20Plum%20Pocket.pdf ). Young trees are more likely to be attacked than older ones if the older trees are healthy.
Pesticide applications can be made to provide a protective layer that will kill newly emerged larvae as they try to bore into the tree. Therefore, these applications must be applied before the larvae hatch. These applications are most critical with young trees up to 5 years old. Spray should be heavy enough to run down the trunk and into the soil at the base of the tree. Pesticides labelled for peach tree borer include permethrin (Hi-Yield Lawn, Garden Pet and Livestock Insect Control; Eight Vegetable, Fruit & Flower Concentrate) and carbaryl (Sevin). Apply two applications at 3 week intervals starting in early July. (Ward Upham)
Pesticide applications can be made to provide a protective layer that will kill newly emerged larvae as they try to bore into the tree. Therefore, these applications must be applied before the larvae hatch. These applications are most critical with young trees up to 5 years old. Spray should be heavy enough to run down the trunk and into the soil at the base of the tree. Pesticides labelled for peach tree borer include permethrin (Hi-Yield Lawn, Garden Pet and Livestock Insect Control; Eight Vegetable, Fruit & Flower Concentrate) and carbaryl (Sevin). Apply two applications at 3 week intervals starting in early July. (Ward Upham)
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