New in 2017 is a lawn product name that may sound familiar. But the new Roundup for Lawns is a stark contrast from the traditional Roundup herbicide. The two products have completely different ingredients and are NOT interchangeable.
Consumers in-store or online must carefully read product labels to determine the main ingredient and use for all pesticides, but especially with the Roundup products.
Roundup Weed and Grass Killer is a brand name of an herbicide that contains glyphosate. This active ingredient nonselectively kills most plants, including both broadleaf and grasses. Homeowners may use this product to kill anything growing in cracks, between patio pavers, even entire lawns, for example. Agricultural producers also use glyphosate in their fields to kill unwanted foliage. While there may be exceptions, expect that all plants sprayed with Roundup Weed and Grass Killer will die.
Roundup for Lawns on the other hand, is the brand name of a new herbicide that does not contain glyphosate; rather it contains the active ingredients MCPA, quinclorac, dicamba and sulfentrazone. Each is a selective herbicide that controls various weeds without harming Kentucky bluegrass, perennial ryegrass or tall fescue lawns. Research trials do, however, show that some of the active ingredients in Roundup for Lawns (MCPA and dicamba) could cause short-lived injury to buffalograss lawns.
Other manufacturers have mixtures that contain similar ingredients as Roundup for Lawns and target the same weeds. Labels describe the ingredients.
Other Roundup products are also available for home use. Roundup for Lawns for use on Southern Grasses contains an ingredient that may injure some cool-season lawns. Roundup Extended Control and Roundup Max Control 365 both contain imazapic, a soil-residual herbicide that kills cool-season grass seedlings for weeks after application. Avoid using these extended control products in renovations where seeding will take place soon after application.
Roundup products may be displayed together in stores, so consumers must ensure they are making the correct herbicide selection. Furthermore, pricing differs among Roundup products; consumers should not automatically select the least expensive product, which is likely “traditional” Roundup.
Always read the label for the active ingredients and follow safety directions. When handling and applying pesticides, at minimum wear a long-sleeved shirt, long pants, shoes, socks and chemical-resistant gloves.
Always read the entire product label before using an herbicide.
The table below identifies uses for the active ingredients in various formulations of Roundup, and will help determine which formulation best suits your needs.
|Active Ingredients||Roundup Weed and Grass Killer||Roundup Extended Control||Roundup Max Control 365||Roundup for Lawns (1, 2 or 3)*||Roundup for Lawns (4, 5 or 6)**||Typical Weeds Controlled|
|Imazapic||x||x||Summer annual grasses; not safe in cool-season turf; soil residual kills new seedlings|
|MCPA||x||Broadleaf weeds, especially dandelion|
|Quinclorac||x||Crabgrass, sandbur, and some broadleaf weeds|
|Dicamba||x||x||Broadleaf weeds, especially white clover|
|Sulfentrazone||x||x||Yellow nutsedge; typically only suppression as part of premixed products (less active ingredient)|
|Penoxsulam||x||Broadleaf weeds; may injure perennial ryegrass or tall fescue lawns|
|2, 4-D||x||Broadleaf weeds, especially dandelion|
*Roundup for Lawns is sold as a ready-to-use product with an included wand (1), as concentrated herbicide (2), or for use as a hose-end sprayer (3).**Roundup for Lawns: For Use on Southern Grasses is sold as a ready-to-use product with an included wand (4), as concentrated herbicide (5), or for use as a hose-end sprayer (6).
For more articles on lawn and turf care see http://turf.unl.edu/turf-info.