A micro-infusion is?

• A. A feeding needle is used to inject the solution.
• B. A way to apply a pesticide solution directly onto the trunk of a tree.
• C. Often made using a drop or rotary spreader.
• D. Used to mix pesticides with soil.

Answer: (B)

Micro-infusion is a trunk-delivery method for pesticides, delivering a pesticide solution directly into the tree through a small injection point on the trunk so the chemical moves systemically inside the tree to reach target tissues. This approach minimizes off-target drift and environmental exposure compared with spraying or soil applications, and it’s commonly used for pests like borers. It differs from surface applications or soil mixes because the pesticide is distributed within the tree itself rather than applied to the bark or soil.