Bronze birch borer larvae feed:

Bronze birch borer larvae feed:

• A. Under the bark
• B. In the canopy
• C. In the roots
• D. In the fruit

Answer: (A)

Larvae feed beneath the bark, in the phloem and cambial tissue just under the outer layer. As they tunnel and feed in this zone, they disrupt the tree’s nutrient transport and can girdle branches or even the entire tree, leading to decline and dieback. You’d typically see stress symptoms like thinning canopy and bark changes once feeding has progressed. They do not feed in the canopy, roots, or fruit, which is why those locations aren’t correct.

Larvae feed beneath the bark, in the phloem and cambial tissue just under the outer layer. As they tunnel and feed in this zone, they disrupt the tree’s nutrient transport and can girdle branches or even the entire tree, leading to decline and dieback. You’d typically see stress symptoms like thinning canopy and bark changes once feeding has progressed. They do not feed in the canopy, roots, or fruit, which is why those locations aren’t correct.