What is recommended when applying Triclopyr to floating or emergent vegetation?

• A. Do not mix with any surfactant.
• B. Mix with water and a non-ionic surfactant.
• C. Mix with chlorine bleach.
• D. Apply as dry granules without water.

Answer: (B)

The main idea here is that surfactants help herbicides wet and stick to plant surfaces so the chemical can be absorbed effectively. Triclopyr is taken up by the leaves of broadleaf aquatic plants, and floating or emergent vegetation often has surfaces that are hard for a plain water solution to wet evenly. A non-ionic surfactant lowers the surface tension of the spray solution, allowing droplets to spread out and stay on the leaf rather than bead up and run off. This improves contact with the leaf tissue and enhances uptake, making the treatment more effective.

Mixing with water is essential because you’re applying the product as a liquid in the field, and proper dilution ensures even coverage. The non-ionic surfactant is commonly recommended because it works well with many aquatic herbicides and tends to be gentle on non-target species when used as directed.

Avoid mixing with chlorine bleach, which can react with the herbicide and create harmful byproducts or reduce effectiveness. Applying dry granules without water isn’t appropriate for aquatic use, since you need a liquid medium to distribute the product and wet the plant surfaces. Always follow the label instructions for mixing specifics, including the type and amount of surfactant.