Rainbow Treecare Scientific Advancements is the only plant health care (PHC) manufacturer in the industry that is not tied to one type of treatment method, so you can trust our recommendations are founded in the best option for you and your clients’ trees. Strictly speaking, there are three separate chemical application methods for PHC managers: spray application, soil application, and vascular injection. Soil application can include soil injection or basal drench. Vascular injection can include macro-infusion and micro-infusion. Each has advantages and drawbacks so it is important not to get tunnel vision about one method over others. For more information, visit www.treecarescience.com.