2,4-Dichlorophenoxyacetic acid

2,4-Dichlorophenoxyacetic acid丨CAS 94-75-7 is a widely used systemic herbicide, known by its CAS number 94-75-7. It belongs to the phenoxy group of herbicides and mimics the natural plant hormone auxin, disrupting normal growth processes in susceptible plants. Since its development in the 1940s, 2,4-D has become a cornerstone in global weed control, particularly for broadleaf weeds in cereal crops, turf, pastures, and non-crop areas.

A. Agriculture

2,4-D is extensively used in the control of broadleaf weeds in grass crops, such as:

Wheat

Corn (maize)

Rice

Barley

Sugarcane

Sorghum

It is typically ineffective against grasses, allowing selective targeting of broadleaf species without harming the crop.

B. Turf and Lawn Care

Applied in lawns, golf courses, and sports fields, 2,4-D helps maintain grass by controlling invasive weeds like:

Dandelions

Clover

Plantains

Chickweed

Thistles

2,4-Dichlorophenoxyacetic acid丨CAS 94-75-7 is often blended with other herbicides like dicamba and mecoprop in "three-way" formulations for broader spectrum efficacy.

C. Pasture and Rangeland Management

Used to enhance forage quality and yield by eliminating undesirable weeds in:

Grazing pastures

Hayfields

Rangeland ecosystems

D. Industrial and Non-Crop Uses

2,4-D is used for vegetation control in utility rights-of-way, railways, fence lines, roadsides, and airfields, where broadleaf weed management is crucial for visibility and infrastructure protection.

A. Selective Herbicide

Targets broadleaf weeds without damaging grasses and cereals.

Ideal for crop-weed selectivity, reducing the need for mechanical weeding.

B. Cost-Effective and Versatile

Inexpensive compared to many newer herbicides.

Applicable to a wide range of crops and land types.

Available in various formulations: acid, amine salts, and esters.

C. Rapid and Reliable Performance

Visible effects on weeds within days.

Systemic action ensures thorough weed kill from leaf to root.

D. Integrated Weed Management Tool

Combines well with other herbicides and techniques to delay resistance and ensure broad-spectrum control.

2,4-Dichlorophenoxyacetic acid丨CAS 94-75-7 is one of the most important and widely used herbicides in modern agriculture. Its selective action against broadleaf weeds, low cost, and versatile application across crops and non-crop areas make it a mainstay in global weed management. Responsible use, including adherence to resistance management practices and environmental protection guidelines, will ensure 2,4-D remains an effective tool in sustainable agriculture for years to come.

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