Abstract: The present invention provides methods for applying active ingredients including pesticides, plant growth regulators and plant nutrients to plants by applying formulations comprising the active ingredients and a solvent to the soil around a plant.

Abstract: The present invention provides methods for applying active ingredients including pesticides, plant growth regulators and plant nutrients to plants by applying formulations comprising the active ingredients and a solvent to the soil around a plant.

Abstract: A system and method for injecting liquids into trees is provided with an injection device having a liquid container and a removable needle. The system positions the needle into the sapwood of the tree. Liquid is injected into the tree through ejector holes in the needle. The ejector holes may be sized to prevent the liquid from reentering the needle once the ejector holes engage tree material. A check valve may be associated with the needle to substantially prevent the liquid from exiting the tree through the needle. The needle may be permanently left in place or removed after the liquid disburses into the tree.

Abstract: A system and method for injecting liquids into trees is provided with an injection device having a liquid container and a removable needle. The system is engaged with a tree so that the needle is disposed into the sapwood of the tree. The liquid is injected into the tree out ejector holes in the needle that are sized to permit the passage of the liquid but to self-seal when engaged by tree fiber. Once the liquid is injected, the injection device may be disengaged from the tree and the needle. The needle may be permanently left in place or removed after a short time.

Abstract: An injection retention plug is insertable into a hole in the outer bark layer of a tree so that upon injection of fluid through the plug to an area between the xylem and inner bark layers, the plug will fill the hole to block leakage of the injected fluid outwardly through the outer bark. The plug is of a size and shape to fill the cross-sectional area of the preformed hole in the outer bark. It includes a core of resilient material which is expandable upon withdrawal of the fluid injection device to fill the hole. A method for injecting fluids into a tree includes forming a hole in the outer bark, inserting the plug into the hole, injecting fluid through the plug for retention between the xylem and inner bark layers and allowing the plug to block leakage of fluid outwardly through the injection hole.

Abstract: An apparatus and method for injecting liquids directly into the stem or trunk of a plant. The apparatus includes a container for holding liquid, an injection device and a conduit extending between and connected to the container and the injection device. Mounted on the injection device is a tapered, wedged-shaped needle having an outer surface, a liquid-conducting needle conduit and at least one ejector hole extending between the outer surface of the needle and the needle conduit whereby liquid may be transferred from the needle conduit to the outer surface of the needle. Liquid may thus be transferred from the container through the conduit to the injection device, through the needle and out of an ejector hole onto the outer surface of the needle for injection into the stem or trunk of a plant.