Is there a system that does not require a hole to be drilled into the tree before inserting the delivery system like a hypodermic needle and syringe? And is the needle strong enough to just be pushed into the tree without too much force? Answer: ArborSystems’ Wedgle Direct-Inject Tree Injection System is highlighted in the Integrated Pest Management (IPM) of Midwest Landscapes manual as the only injection application method using a liquid injection that did not require a drilled hole. Our system uses a needle-like injection tip that is pushed through the bark. For more information our complete line of Quick-Connect Injection Tips for hardwoods, conifers and palms, click here.