What is a tree implant used for?

A tree implant, specifically designed for the purpose of enhancing tree health, primarily serves to treat trees for insect infestations. These implants are often formulated with insecticides or other therapeutic agents that can be directly delivered into the tree's vascular system, providing a targeted approach to managing pests that threaten the tree's survival. This method allows for a more effective control of insect populations, as it minimizes the need for surface sprays that may affect beneficial insects or the surrounding ecosystem.

While the other options may seem plausible in various contexts regarding tree care, they do not accurately reflect the primary purpose of a tree implant. For instance, promoting seed growth in trees, enhancing root growth, and protecting trees from diseases involve different strategies and products, such as fertilizers, root stimulators, or fungicides, rather than the specific application method that an implant provides. The targeted nature and methodology of tree implants make them particularly useful in directly combating insect issues while maintaining the overall health of the tree.