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.
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.
Apparatus and methods for injecting a fluid into tissue of a plant are described. In one embodiment, the apparatus (1) comprises a spindle (2) which rotates within a fluid delivery manifold (3). The spindle can be driven by an electric drill and the spindle has a threaded portion (4) for insertion into the plant. In another embodiment, the apparatus includes a pump barrel which in conjunction with the spindle allows the apparatus to be used as a syringe. Methods of delivering fluid to plant tissue using apparatus according to the invention are also described.
A Japanese knotweed injector system for injecting a dose of weed-killing fluid into the stem of a Japanese knotweed, including a fluid dispenser system with a fluid passage, a collared needle with a fluid delivery aperture in communication with the fluid dispenser system, and an actuator connected to the fluid dispenser system for actuating the transmission of fluid from the fluid dispenser system to the fluid delivery aperture. A Japanese knotweed injector system for use with several different needle profiles using interchangeable connectors.
