A healthy turf grass is a great start for controlling weeds in your lawn. We strongly suggest that the home owner continue a pattern of applying pre-emergent spray that we started when the sod was still at the farm. This will help keep the yard weed-free, if a good program is continued. Every lawn has different soils, different turf, and different weed problems. All of these factors must be considered when attempting to control weeds. That is why our number one recommendation for controlling weeds is to hire a professional lawn care service. Whether you choose to do it yourself or hire a professional, the next few paragraphs will increase your knowledge of weed control.
Weed identification is the first step in a successful weed control program. If you are unable to identify the weed (or weeds); the local Extension office, lawn and garden center, or lawn care service can provide the necessary information. Once problem weeds have been identified, it is then important to select the correct herbicide.
The product label is the best source of information as to which grass can be treated with that particular product. Some products contain more than one herbicide. Read the product label carefully to ensure safety and that the product will work on your particular type of grass. Follow the directions exactly. Also, each label should recommend the best way to apply the product.
There are several terms that are used in weed control that should be defined:
Preemergence herbicide – A herbicide that is applied to a lawn grass surface before problem weeds germinate and emerge from the ground. These herbicides must be applied before a weed problem develops. Usually, preemergence herbicides are ineffective when applied to emerged weeds.
Postemergence herbicide – A herbicide that is applied after weeds have emerged, but while they are small and actively growing. This type of herbicide is applied to the leaf and stem tissue of the problem weeds. Generally, postemergence herbicides will not control weeds that germinate and emerge after the application.
Non-selective herbicide – A herbicide that kills all vegetation treated. Typically, these products are applied to the foliage of the weeds. This type herbicide will also severely injure or kill desirable plants. A popular non-selective herbicide is Roundup.
For more information and a list of herbicides, please go to the website;http://www.aces.edu/pubs/docs/A/ANR-0500-B/VOL2-2008/home_lawns_weed.pdf