Tree injection involves what method of pesticide application?

Tree injection is a targeted method of pesticide application where the pesticide is directly injected under the bark of a tree. This technique allows for precise placement of the pesticide into the vascular system of the tree, enabling efficient transport throughout the plant. This method is particularly useful for controlling specific pests or diseases that affect trees, as it minimizes exposure to non-target organisms and the environment by limiting the pesticide's dispersion.

Injecting the pesticide directly into the tree helps ensure that it reaches the intended area where pests may reside, thereby increasing the effectiveness of the treatment. Additionally, because the pesticide bypasses the external environment, it reduces potential negative impacts on surrounding flora and fauna.

Other methods of application, such as spraying on foliage, incorporating into soil, or ground-level spraying, generally involve broader application techniques that may not offer the same precision in targeting tree-specific issues as tree injection does.