Roller and rope-wick applicators are used to

• A. Apply pesticides at a set height, usually targeting weeds taller than the desired vegetation
• B. Inject into tree trunks
• C. Mist foliage uniformly
• D. Treat soil only

Answer: (A)

Roller and rope-wick applicators deliver pesticide by direct contact with the foliage at a chosen height. As you move the device, the roller or wick picks up solution and wipes or transfers it onto the leaves that touch it. By setting the height so it reaches only the taller weeds that extend above the desired vegetation, you target those plants while leaving shorter, desirable vegetation unharmed. This approach reduces drift and off-target impact compared to spraying the whole area. They aren’t used for injecting into tree trunks, misting foliage uniformly, or treating soil only.