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ClopyralidImage result for Clopyralid

Clopyralid is a popular active ingredient used in herbicides which eliminate selective weeds like clover, thistles, dandelion, and other hard to kill broadleaf weeds. Clopyralid belongs to the pyridine family of chemicals. It has a high persistence and stays in compost or dead plants, even up to 14 months.

Solutions Pest & Lawn is proud to have in our inventory quality herbicides which contain clopyralid. On this page you can learn some interesting facts about clopyralid, it’s mode of action and benefits. You can also access this page to shop our entire line of products that are clopyralid-based.

What is Clopyralid?

Clopyralid (chemical name 3,6-dichloro-2-pyridinecarboxylic acid) is an auxin-mimic type herbicide. It is more selective (kills a more limited range of plants) than some other auxin-mimic herbicides like picloram, triclopyr, or 2,4-D.  Clopyralid was first registered as a herbicide in the US in 1987 and has been manufactured by Dow AgroSciences under the trade names under the trade names Transline®, Stinger®, Reclaim®, and Curtail®. 

Formulations labelled for non-cropland use include Transline® (clopyralid amine salt formulation) and Curtail® for the control broadleaf weeds on lawns and turf, range, pastures and rights-of ways. Over 890,000 lbs of clopyralid is utilized per year in the USA on agricultural crops

It is a selective and systemic herbicide that can be absorbed through the leaves and roots of the targeted weed. These products are formulated as red-to-brown colored liquid concentrates.

How Chlorsulfuron works

The mode of action of clopyralid is that it operates like a plant growth regulator by imitating natural plant hormones called auxins. Auxins, which are found in all members of the plant kingdom, are responsible for regulating the amount, type and direction of plant growth, and are mostly found at the tips of plant roots and shoots. Clopyralid enters plants that have been treated through the leaves and roots, and replaces natural auxins at binding sites, causing abnormal growth patterns and disrupting the growth processes of the plant. 

The chemical builds up in the growing points of the plant, leading to rapid overgrowth, and eventual plant death. Death can usually arrive from as little as a few days to a couple of weeks. Commercial products containing clopyralid contain either the acid form, or one of its three salts; triethylamine, triisopropylamine, or monoethanolamine salts.4 It is also compatible, and often formulated, with other synthetic growth regulators such as 2,4-D, triclopyr and MCPA4 for a broader range of post-emergent control. Clopyralid is similar to the herbicide picloram, which also acts as a growth regulator but has now given developed a resistance among grasses.

View our selection of clopyralid-based products below. For more information about clopyralid or other active ingredients in our herbicides and insecticides, please don’t hesitate to 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 Clopyralid

Clopyralid 3 (Transline/Reclaim Herbicide) - also known as Transline Herbicide or Reclaim Herbicide is manufactured by Alligare for control of broadleaf weeds and woody brush in non-crop areas, forestry sites, storage areas, rangelands, and pastures. When using Clopyralid 3 Herbicide there are no grazing or haying restrictions.


Curtail Herbicide (Cody Clopyralid) - Curtail Herbicide with clopyralid and 24d from Alligare is a selective herbicide used as a horsetail weed killer but it also controls many other invasive weeds in pastures. It has an alternative name of Cody Broadleaf Herbicide. Curtail Herbicide is typically sold only to agricultural applicators but it is the best weed killer money can buy.


How Safe Is Chlorsulfuron?


The US EPA has placed clopyralid in the acute toxicity III category which is on the lower side of the severity scale. Laboratory studies have shown that clopyralid is a severe eye irritant. Skin irritation has also been noted, which can lead to skin sensitization for prolonged skin exposures.


Clopyralid is non-toxic to fish but is slightly toxic to birds and is toxic to some beneficial insects like the ladybug and lacewings. Clopyralid is persistent in soil, with recorded half-life of 2-14 months.


While it is a relatively safe chemical to use, it is still highly recommend to use protective equipment (PPE) before applying Clopyralid. Gloves, protective glasses and long sleeve clothing should be a the minimum level of protection when handling this chemical. Please refer to the product label for specific safety instructions.

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