Herbicide for Bermuda Grass

Keep bermuda grass where you want it.

Bermuda grass is a durable and resilient grass that is used in sporting fields, parks and golf courses. But, bermuda grass may be undesirable, either as a lawn grass or in flower beds. If this is the case, and if bermuda grass is already present in the area where it is not wanted, it can be difficult to remove, mainly because the variety is so resilient. Digging up a patch of bermuda grass can seem to work--the grass is not there anymore--but seeds have distributed during the weeding process, and the stolons develop a root system, which can stay in place after weeding. Because of these difficulties, many gardeners use herbicides.

Types

There are three main types of herbicides that can be used to remove bermuda grass: a herbicide that specifically kills grass only, and does not affect other plants; a general herbicide, that kills all plants on which it is applied; a suppressant, which will temporarily prevents the further growth of bermuda grass stems and leaves.

Active Ingredients

Herbicides that specifically affect grass commonly contain the active ingredient fluazifop, clethodim or sethoxydim. Fusilade, Ornamec, Grass-B-Gon, Envoy and Grass Getter are products representing this type of herbicide. Glyphosate, which is found in Roundup, is a common ingredient in general herbicides. Suppressants can contain pelargonic acid and glufosinate. A suppressant herbicide also contains sethoxydim, but, as in the product Poast, this ingredient comprises only 18 percent of the formula.

Application

For best results when using a grass-specific herbicide, University of California, Davis, recommends treating in early spring, when the grass is around 6 inches tall, for the first application. This herbicide can be reapplied, but no more than the package directions. On whatever plant a general herbicide is sprayed, the leaves, stems and root-system will be killed. University of California, Davis, advises to use this herbicide when the bermuda grass is in full growth, and has developed a large surface area. The larger the surface area, the greater the amount of herbicide absorbed by the plant. A suppressant can be applied when bermuda grass is at any size or age of growth. And the more times you apply a suppressant, the greater your chances of suppression.

Benefits

Bermuda grass, because it has a strong root system and is drought-resistant, can easily avoid eradication methods that do not target the entire plant. Herbicides and suppressants can travel through the entire plant, down into the root system, killing or suppressing the entire plant.

Considerations

A herbicide is not necessary if bermuda grass is found near flowers, or plants that are not surrounded by vegetation: mulch spread over the grass will prohibit growth, or you can dig up the grass. But if you want to use herbicide, use the grass-selective type if flowers, trees, or shrubs are within spray range. As a herbicide is a toxic chemical, follow package direction for proper use and safety precautions.

References

• Lawn and Garden Weed Control: Bermuda Grass Herbicides
• University of California, Davis, Pest Management Program: Bermuda Grass
• BASF: Poast
• University of Georgia, College of Agricultural and Environmental Sciences: Bermuda Grass Control
• American-Lawns.com: Bermuda Grass