There is proposed an apparatus for introducing a chemical into a plant tissue of a target plant, including a body being graspable by a user, and an applicator portion attachable to or forming a part of the body, the applicator portion including a reservoir chamber for holding the chemical, and one or more elongate porous piercing elements, in fluid communication with the reservoir chamber, being configured to pierce the plant tissue, wherein the chemical within the reservoir chamber is drawn or moves into the one or more elongate porous piercing elements, such that as the one or more elongate porous piercing elements penetrate into or through the plant tissue the chemical is applied to an edge of a resultant incision therein.