Volatility Volatility is the tendency of a liquid to undergo a phase change from a liquid to a gas. All herbicides are volatile to some degree, but they differ greatly in this property. Sonalan and Treflan comprise another group of volatile herbicides that must be incorporated. Lower volatilization losses occur from dry, cool soil surfaces. Volatile herbicides should be applied only when the soil is dry enough for good soil mixing.
Soil mixing instructions appear on the label of herbicides and vary with the product.
Incorporation of other herbicides can be delayed, up to 24 hours with Treflan. Command must be soil incorporated in Iowa and Minnesota and many other eastern states. In Nebraska, Command may be soil incorporated or used in a preemergence surface application. Air temperatures in Nebraska are usually moderate when soybeans are being planted, which minimizes the vaporization potential of Command. Off-site movement of spray drift or vapors of Command can cause foliar whitening or yellowing of plants.