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When applying systemic pesticides to trees, make an application to soil whenever possible as directed on product labels instead of injecting or implanting trees with pesticides. Injecting or implanting trunks injures trees and creates wounds that can provide entry sites for pests.

Adapted from S. H. Dreistadt and M. L. Flint. 2004. Pests of Landscape Trees and Shrubs. 2nd edition. Oakland: Univ. Calif. Agric. Nat. Res. Publ. 3359.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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