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Broadleaf and grassy weeds in southern grasses like St. Augustine can be especially difficult to remove using mechanical or manual methods because they almost always come back. Also there is a risk in harming the desirable turf while trying to remove such invaders. However, with the help of a new selective herbicide known as thiencarbazone.

Solutions Pest & Lawn has a quality selection of herbicide products in stock which contain the active ingredient thiencarbazone and we highly recommend this product to our customers who want to control those pesky perennial weeds. On this page you can learn some fascinating facts about thiencarbazone, it’s mode of action and benefits. You can also access this page to shop our entire line of products which contain thiencarbazone.

What Is Thiencarbazone?

Thiencarbazone-methyl is a broad-spectrum sulfonyl-amino-carbonyl triazolinone herbicide. It controls grasses and broadleaf weeds in maize, displaying a good balance between foliar and residual action. Thiencarbazone was registered by and manufactured by Bayer Cropscience.

Thiencarbazone was originally used by the agricultural industry to protect corn from  Thiencarbazone-methyl is taken into the weeds through aerial portions of the plants and from the soil. Thiencarbazone-methyl therefore provides a strong residual component for weed control

How Does Thiencarbazone Work?

Thiencarbazone control weeds through its mode of action by inhibiting photosynthesis in plants. Thiencarbazone disrupts membranes and inhibits photosynthesis in plants by a inhibiting the ALS enzyme which is necessary for plant growth. Thiencarbazone is received in the plants through the roots of the plants. As the plants come out of the soil , they die after exposure to light. It also works on foliar contact causing rapid desiccation.

Browse our selection of thiencarbazone contained products below. For more information about thiencarbazone 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.

Featured Products Which Contain Thiencarbazone

Celsius WG Herbicide - Celsius™ controls weeds at high temperatures, allowing the turf to reach its optimal density during the most favorable time of year for growing warm-season grasses. There is no better weed control than dense and healthy turf.

Unlike some other post-emergent herbicides, LCOs can feel confident applying Celsius because it is safe to use year round at high temperatures on St. Augustine and centipede turf without risk, damage, or fear of significant phototoxicity. Celsius is a post-emergent herbicide. With some pre-emergent control, Celsius also allows turf to release into areas where weeds once lived. Newest generation post-emergent herbicide. Celsius features two new actives - iodosulfuronmethyl- sodium and thiencarbazone-methyl - and gives turf managers a new tool for managing resistance to some existing post-emergent herbicides.


Tribute Total Herbicide - Tribute Total provides broad-spectrum, post-emergent weed control in bermudagrass. After application, Tribute Total is readily absorbed by the foliage and carried to the site of action in the growing points of the susceptible plant.


Is Thiencarbazone Safe To Use?

The U.S. Environmental Protection Agency (EPA) classifies Thiencarbazone as category III (Low Toxicity) with a signal word of CAUTION because it causes moderate eye irritation and is harmful if inhaled, swallowed, or absorbed through the skin


Thiencarbazone has low toxicity if is eaten or gets on the skin, and very low toxicity if inhaled. In rabbits, Thiencarbazone caused eye irritation which resolved within 24 hours and did not irritate the skin. Thiencarbazone did not cause skin sensitization in guinea pigs.


It is recommended that when handling Thiencarbazone (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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