Abstract: A tree injection closed system functions to dispense treatment fluid such as tree growth regulators (TGR) or retardants into the cambium layer of a tree to slow the growth thereof. Other treatment fluid include nutriments and fungicides, for example. The system comprises an injector having a tubular body section for holding a charge of treatment fluid, and an injector tip in fluid communication with the tubular body section functions to dispense the fluid into the cambium layer of the tree being treated. A manual pump in fluid communication with a supply of treatment fluid may be used to charge the injector with the fluid. Alternatively, the treatment fluid supply may be pressurized and the fluid directly charged into the injector. Another alternative comprises a syringe which functions to fill the injector with a pre-packaged dose of treatment fluid.

Abstract: The apparatus of this invention is an element that has at one end the means for attaching to that end a pressurized vessel containing the material which is to be used in treating a tree and at the other end outlets for the said material which outlets are correlated to be positioned right at certain prepared exposed areas of the tree into which the material is to be directed. In between the two ends there is a valve means that is in conduit relationship with the passageway between the two said ends.