What can one borer do to a 4-inch tree?

What can one borer do to a 4-inch tree?

• A. Completely girdle and kill it
• B. Stunt growth only
• C. Cause cosmetic damage
• D. Damage only the bark, not the cambium

Answer: (A)

A single borer can completely girdle and kill a four-inch tree because it can tunnel around the trunk and sever the phloem and cambium, which are essential for nutrient transport and new tissue growth. In a small tree, a continuous ring around the trunk stops water and sugars from moving between the roots and the crown. Once that vascular connection is cut, the part above the girdle can no longer receive what it needs, and the tree will die. Cosmetic bark injury or mere growth stunting would not necessarily kill the tree, and bark-only damage that doesn’t reach the cambium wouldn’t disrupt the critical nutrient flow. So the most accurate outcome for a single borer is girdling and death of the tree.

A single borer can completely girdle and kill a four-inch tree because it can tunnel around the trunk and sever the phloem and cambium, which are essential for nutrient transport and new tissue growth. In a small tree, a continuous ring around the trunk stops water and sugars from moving between the roots and the crown. Once that vascular connection is cut, the part above the girdle can no longer receive what it needs, and the tree will die. Cosmetic bark injury or mere growth stunting would not necessarily kill the tree, and bark-only damage that doesn’t reach the cambium wouldn’t disrupt the critical nutrient flow. So the most accurate outcome for a single borer is girdling and death of the tree.