Chemical Control of Broadleaf Weeds in Turf

Currently, relatively few herbicides are used to control broadleaf weeds in turf. Years of observation allow us to accurately predict the activity of these chemicals. This section briefly summarizes herbicides and herbicide mixtures. Weed susceptibilities to these materials can be found in the table at the end of this section.

Herbicide rates Recommendations vary significantly depending on site (location and turf type) and targeted weed species. Therefore, they are not included in this section of the handbook. Please carefully consult the correct label.

Weed and Feed Products Over the years, there have been a variety of fertilizer products with herbicides included in their formulation. There are many products currently available for use by the turfgrass professional, as well as the average homeowner. The latest trend is to offer the fertilizer without any P and a weed control product contained on the fertilizer granule. For sites where there are many weeds and it is impossible to spray, the weed and feed gives the turfgrass manager a chance to reduce the weed population. The combinations of herbicide products can be confusing, so make sure to read the label closely. A few examples of products available are: 10-3-10 fertilizer with 0.2% Dimension: 18-0-6 Weed Free Zone Plus; 12-5-5 Premium Weed & Feed; 20-0-0 Ultra Turf Moss-Ex Lawn Granules; or 22-4-10 Fert with TGR Poa Annua Control. Pay close attention to how the herbicide that is on your fertilizer would be taken up by the weeds. You want to make sure to follow the appropriate methods to get maximum weed control.