Which device is used to precisely put pesticide into the trunks of larger brush or trees?

• A. Aerosol sprayers
• B. Duster sprayers
• C. Tree injectors
• D. Hand sprayers

Answer: (C)

The main idea is delivering pesticide directly into the tree’s vascular system. Tree injectors are designed to pierce the trunk and place the chemical inside, allowing the pesticide to move systemically through the tree. This is ideal for larger brush or trees because it provides precise, targeted delivery and minimizes drift and surface exposure, which helps protect non-target plants and the environment. Other devices are intended for spraying onto foliage or surfaces, or dispersing dry formulations, and they don’t reliably introduce chemicals into the trunk for systemic uptake. So, for precise trunk delivery, a tree injector is the right tool.