Macroinfusion is best described as

• A. A way to apply a pesticide solution directly into the trunk of a tree.
• B. A foliar spray on leaves.
• C. A soil injection method.
• D. A granular application method.

Answer: (A)

Macroinfusion is the trunk-based infusion method that introduces a pesticide solution directly into the tree’s vascular system through trunk injection. Once inside, the chemical is carried systemically through the tree, providing protection to foliage and other tissues rather than just where it’s applied on the surface. This stands in contrast to foliar sprays on leaves, soil injection into the root zone, or granular applications to the soil. The approach offers rapid, system-wide protection and reduces drift, but it requires careful dosing and technique to avoid stressing or injuring the tree.