Herbicide labels now include a standardized system to inform users of the product’s mechanism of action (MOA). A box labeled ‘Herbicide Group’ is present near the top of the label. The number in the box represents MOA of the active ingredient, based on a system developed by the Weed Science Society of America. Premixes containing more than one mode of action will have multiple numbers listed. Following is an example of the new logo.
Iowa State University
Hartzler, Robert G., "New Information on Herbicide Labels" (2010). Integrated Crop Management News. 344.
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