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Product Label SDS Sheet

Weedar 64 Contains 2,4-dichlorophenoxyacetic acid (2,4-D), one of the most widely used herbicides in the world today. 2,4-D stimulates different responses within a plant depending on a lower or higher level of concentration, much like a natural plant growth regulator. At low rates, 2,4-D acts as a plant growth regulator. At higher rates, it acts as a herbicide. 2,4-D, commonly referred to as a hormone herbicide, reacts with the plant's natural metabolism, causing distorting and twisting effects within the plant. In essence, the plant grows itself to death. The 2,4-D Amine weed killer to control susceptible broadleaf weeds in certain aquatic applications.

Product Highlights:

  • Selective control of many weeds and grasses
  • Superior performance
  • Acts as a growth regulator and herbicide
  • Controls broadleaf weeds
  • Up to 10 Acre+ coverage




2.5 Gallon Container

Online Purchase
Not Available






Water Use Restrictions

Active Ingredients: 2,4-Dichlorophenoxyacetic acid, dimethylamine salt
Weight % Active Ingredient: 46.8
EPA Reg.No.


Number of Days
Human Drinking 21 days or <0.1 ppm
Human Swimming 0
Human Fish Consumption 0
Animal Drinking 0
Turf Irrigation 21 days or <0.1 ppm
Forage Irrigation 21 days or <0.1 ppm
Food Crop Irrigation 21 days or <0.1 ppm

Not Just For Ponds

Weedar 64 is used in the agricultural industry as well to control susceptible broadleaf weeds in cereal grains, corn, sorghum, rice, sugarcane, soybeans (preplant only), turf, non-crop areas.

*Consult product label for exact dosage and application specifications

Read Entire Label Prior To Treatment

For Best Results

Heavy, out of control growth may require more than one application or physical removal to gain control. For best results, use under conditions of minimal water flow. Apply early on the morning of a calm, sunny day. Contact time should be at least 3 hours.


Treatment effectiveness depends on density of vegetation and time of year at which the herbicide was applied. In some cases multiple treatments may be required.

*All pesticides can be harmful to health and the environment if misused. Read the label and follow directions. Consult with your local regulatory agency before applying herbicides and algaecides to public waters. There are herbicides from other states that are either not licensed in Wisconsin or Illinois, or are not recommended by ABI.

A WI DNR Aquatic Plant Control Permit or DATCP Fish Farm License is required in WI in order to apply algaecides or herbicides. In addition ponds and lakes with overflows not contained on the property are required to obtain a WPDES permit. Illinois Residents are required to obtiain NPDES permits through the Illinois EPA.

In order to apply chemicals in liquid form within Wisconsin, the applicator must be licensed with the State.

Recommendations of pesticide or treatments for specific algae or aquatic plants are provided for general information purposes only - no warranties are expressed or implied.

* We do not ship EPA registered Algaecides or Herbicides to the following states:

Alaska - California - Connecticut - Delaware -  Hawaii - New Hampshire - New Jersey - New York - Maine - Maryland - Massachusetts  -Oregon - Rhode Island - Washington State - Vermont (for additional information about these restrictions please see shipping or terms and conditions).


Michigan Shipments

Aquathol K, Reward, Weedtrine D, & Sonar products can not be shipped without a permit on file.

This product ship via LTL Freight.