What is a branch collar?

The correct answer is the area where a limb joins the trunk. The branch collar is a specialized area located at the base of a limb or branch where it connects to the main trunk of the tree. This area is important for the tree's health because it contains tissues that help prevent the entry of pathogens and supports the healing process if the branch is damaged.

The branch collar plays a crucial role in the tree's natural growth and defense mechanisms. When a branch is cut, the tree will typically respond by activating the branch collar to compartmentalize and seal off the wound to reduce the risk of decay or disease.

Understanding the function and significance of the branch collar is essential for proper pruning techniques, as damaging this area can lead to increased vulnerability for the tree.