Which plant is NOT among those more sensitive to vapor drift?

• A. Corn
• B. Ornamentals
• C. Grapes
• D. Tomatoes

Answer: (A)

Vapor drift injury happens when pesticide vapors move from the treated area onto nearby plants. Different crops react differently because of their leaf structure, surface characteristics, growth stage, and overall tolerance to chemical exposure. Delicate or high-value crops—such as ornamentals and soft fruits like grapes and tomatoes—tend to be more easily damaged by even small amounts of drift. They often show visible symptoms like leaf burn, distortion, or reduced growth from off-target vapors.

Corn, on the other hand, is a robust field crop with a different leaf anatomy and physiology that generally makes it less susceptible to injury from vapor drift compared with ornamentals and fruit crops. So corn is not considered among the crops that are especially sensitive to vapor drift.