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If you are dealing with stubborn nutsedge on your landscapes, one of the best products you can use to alleviate the problem is an active ingredient by the name of halosulfuron. Halosulfuron is known to be effective against both yellow and purple nutsedge.


Solutions Pest & Lawn has a quality selection of herbicide products in stock which contain the active ingredient halosulfuron and we highly recommend this product to our customers who want to control aggressive sedge. On this page you can gain some background info about halosulfuron, it’s mode of action and benefits. You can also access this page to shop our entire line of products which contain halosulfuron.

What is Halosulfuron?

Halosulfuron (chemical name: Halosulfuron-methyl) is a chemical compound which belongs to the family of Alkyl Aryl Ethers. These are organic compounds containing the alkyl aryl ether functional group with formula R-O-R' , where R is an alkyl group and R' is an aryl group. Halosulfuron is commonly used as a herbicide on agricultural farms to provide control around maize, sugarcane and rice.


On landscapes it is known to provide post-emergent control of broad-leaf weeds and sedges. Products containing halosulfuron (such as SedgeHammer) can be used as a spot treatment for purple nutsedge near ornamental trees and shrubs.


Halosulfuron can be applied from the stage of 2-4 leaves up to the end of tillering, also in combination with special products for control of grass weeds. Halosulfuron-methyl shows excellent selectivity to both rice groups (indica and japonica varieties) as well as maize. On maize, it is applied in post-emergence conditions starting from the stage of 1-2 leaves.

How Does Halosulfuron Work?

Halosulfuron mode of action involves interfering with the acetolactate synthase enzyme in targeted plants, which quickly slows cell division, and growth at all points.


To elaborate how this occurs, we have to look at the chemistry behind the active ingredient. Halosulfuron-methyl is a member of the family of sulfonylurea herbicides. This class of herbicides acts through inhibition of acetolactate synthase, thereby blocking the biosynthesis of the branched-chain amino acids valine, leucine and isoleucine. This inhibition leads to the rapid cessation of plant cell division and growth. Crop selectivity results from rapid metabolic inactivation of the herbicide in the tolerant crop. Under growth-room conditions, metabolic half-lives in tolerant crop plants range from 1–5 h, while sensitive plant species metabolize these herbicides much more slowly, with half-lives > 20 h. Pathways by which sulfonylurea herbicides are inactivated among these plants include aryl and aliphatic hydroxylation followed by glucose conjugation, sulfonylurea bridge hydrolysis and sulfonamide bond cleavage, oxidative O-demethylation and direct conjugation with (homo)glutathione.


Products containing halosulfuron benefit from the use of an of a nonionic surfactant for best results. Nonionic surfactant is a soap-like liquid that helps herbicide to stick better when applied to cover the leaf tissue and helps to increase herbicide absorption to kill the weed. Expect to see injury to plants like nutsedge about two weeks after applying halosulfuron. There is a product called Sedgehammer which has halosulfuron as the main active ingredient and already contains a surfactant in the formula.


Browse our selection of halosulfuron contained products below. For more information about halosulfuron or other active ingredients in our herbicides, reach out to us with your questions at 800-479-6583 or email us at askapro@solutionsstores.com.


Why Buy These Products

Featured Products Which Contain Halosulfuron

Sedgehammer Herbicide is a selective herbicide used for post-emergent control of Nutsedge and other weeds in turfgrass and landscaped areas. Sedgehammer can be used in residential, commercial and industrial sites for post-emergent control of select weeds.

Is Halosulfuron Safe To Use?

Halosulfuron is a safe product and has been registered by the EPA has a product with low or moderate toxicity.

It is recommended that when handling Halosulfuron (or any of the other chemicals we carry) to use proper personal protective equipment (PPE) before handling or applying. Gloves, goggles, long sleeved clothing should be the minimum standard. Please refer to the label for proper safety instructions.

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