deep) around the root flare. The con- centrated product is injected into the xylem or sapwood and distributed through the vascular system via the natural sap flow, delivering the chem- icals to branches, leaves and roots. Micro-injections are also defined by the amount of chemical administered: usu- ally just one to five mL per site. It was the scourge of the emerald ash borer (EAB) that really served as the turning point for micro-injections, said Kevin Brewer, northeast territory tech- nical manager for Arborjet Ecologel , a manufacturer of many of the chemicals used in the technique. “Tree injections became the gold stan- dard to successfully treat pests,” he said. “It really opened people’s eyes to the effectiveness of it, the ease of it, and the sustainability of it.” One of the most effective chemicals for EAB is emamectin benzoate, which can also provide multi-year control for two-
A PHC specialist performs a trunk injection of imidacloprid to treat an EAB infected tree.
In fact, a micro-injection has become the new delivery standard for many pesticides, micronutrients and fun- gicides, delivered by drilling a small, shallow hole (typically up to 3/8-inch
for a year, and then we’d do it again. Now, we use the micro-injection method much more oen. You can dial it into the size of the tree, so it’s literally down to a science. We’ve come a long way.”
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Multiple injection tips designed for all types of trees, conifers and palms )NSECTICIDES s &UNGICIDES s 0'2S s !NTIBIOTICS s -ICRO.UTRIENTS
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