Which formulation is most likely to burn plant foliage?

• A. F or L
• B. D or DF
• C. W or WP
• D. E or EC

Answer: (D)

Emulsifiable concentrates use solvent-based carriers and surfactants to dissolve the active ingredient, which helps the product spread and mix with water. That solvent-rich film can break down the leaf surface and cause chemical injury, especially on sensitive or stressed plants when conditions are hot or sunny or when the product isn’t properly diluted. Because of this solvent-driven potential for foliar burn, emulsifiable concentrates are more likely to injure foliage than other formulations when used as directed. Dry formulations, wettable powders, or flowables don’t leave the same solvent film on leaves, so they’re generally less prone to causing leaf burn, though they must still be applied following the label instructions. Always test on a small area and follow label guidance to minimize phytotoxicity.