Abstract: An implant device for insertion into the opening of a tree to provide medication to the tree, comprising an elongated, hollow housing of a length adapted to fit within the tree opening, the housing having an enlarged, closed outer end portion of a size approximately the same as that of the tree opening, and a closed inner end portion. A pair of elongated wing portions are disposed on opposite sides of the housing and extend longitudinally from a point near the inner end portion to the outer end portion, the wing portions extending radially outwardly approximately the same distance as the outer end portions. A pair of outwardly and longitudinally extending flexible projections are disposed on opposite sides of the housing between the wing portions and define generally U-shaped openings in the housing on opposite sides thereof in communication with the interior thereof. A locking barb is disposed on each of the projections and extends radially outwardly approximately the same distance as the wing portions.