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  For most trees, injections made at the flare or base of the tree are preferable. Here are several reasons why:

• Injecting greater volumes of chemical such as fungicides is done more easily.
• Allows for more even distribution throughout the trunk.
• If any sap bleeding, chemical seeping, or damage occurs, it is less visible at the base of the tree.
• For tough-barked trees, such as Hackberry and Hickory, the flare offers a more pliable area of injection.
• Injection holes seal more quickly.
• When controlling cambial feeding borers, it is crucial that injection occurs in the flare so the entire trunk is treated.

Among the easiest trees to inject are Elm, Ash, Oak, Cottonwood, Linden, and Birch. On trees with deep fissures (valleys) such as Cottonwoods, Hemlocks, and some Oaks, it may be necessary to use the long (1.5") Wedgle™ Tips. On thin-barked or small-diameter trees, you may find it necessary to reduce the amount of chemical per injection to .5 ml by changing the dose adjustment ring and double and the number of injection sites.

Timing of the application is very important. Spring through late summer is the ideal time for injection. The bark needs to be pliable and that depends on the weather in your location. Injections too early or too late in the season may cause the chemical to leak through or around the WedgeChek™. Although some leaking is normal, if excess leaking occurs in the spring, wait a few days and try it again. If this happens in the fall, you will either have to reduce the amount of chemical to be injected and add more injection sites, or wait until spring to inject the tree.

For service assistance, contact your distributor or call ArborSystems.