Free Herbicide Site of Action Chart

Mark VanGessel, Extension Weed Specialist;

Using herbicides with different sites of action is important to deal with herbicide resistant weeds, but knowing sites of action can be challenging. A colorful reference chart on herbicide site of action is available free of charge at the Delaware Cooperative Extension offices. This chart is specific for common herbicides used in the Mid-Atlantic States for agronomic and vegetable crops.

The Mid-Atlantic chart was customized from one developed for the Mid-West States and designed it collaboration with the Delaware Soybean Board and the US Soybean Board. It is part of the US Soybean Board’s “Take Action: herbicide-resistance management” campaign.