Cut surface (frill) application involves which process and immediate treatment?

Cut surface (frill) application involves which process and immediate treatment?

• A. Hack or frill the trunk around the trunk, cut through the bark but leave chips connected, and treat the section with concentrated amine herbicide immediately after complete
• B. Drill holes and inject herbicide into the trunk
• C. Spray the leaves with a contact herbicide
• D. Apply a soil fumigant at the base

Answer: (A)

Cut surface (frill) application works by creating an exposed area of cambial tissue on the trunk and then delivering herbicide directly to that freshly cut surface. You hack around the trunk, cut through the bark but leave the chips connected, and immediately apply a concentrated amine herbicide to the exposed surface. The immediate contact with the exposed cambial region allows the herbicide to enter the tree quickly and move systemically to suppress or kill it, which is the goal of this method. Other approaches—injecting herbicide through drilled holes, spraying leaves, or applying a soil fumigant at the base—do not provide the same direct, rapid uptake through the cut surface, so they aren’t correct for this technique.

Cut surface (frill) application works by creating an exposed area of cambial tissue on the trunk and then delivering herbicide directly to that freshly cut surface. You hack around the trunk, cut through the bark but leave the chips connected, and immediately apply a concentrated amine herbicide to the exposed surface. The immediate contact with the exposed cambial region allows the herbicide to enter the tree quickly and move systemically to suppress or kill it, which is the goal of this method. Other approaches—injecting herbicide through drilled holes, spraying leaves, or applying a soil fumigant at the base—do not provide the same direct, rapid uptake through the cut surface, so they aren’t correct for this technique.