Most Effective Products

Alligare Diquat Herbicide
Emulsifiable Concentrate (EC)
As low as $29.04
Weedtrine D Aquatic Herbicide
Suspended Concentrate
As low as $78.21
Keith's Pro Tips

"Diquat works best on water bodies where the water is clear. That means if your pond or lake is muddy it won't be as effective in treating the weeds. This is because Diquat is attracted to silt and sediment so it won't do much damage."


Diquat is a fast-acting aquatic & landscape herbicide that kills both weeds and grasses. It is used frequently in the agricultural industry, for pond management and also has a number of outdoor residential weed control applications.

Solutions Pest & Lawn has a number of products in our herbicide inventory which contain Diquat and we highly recommend this active ingredient to our customers who own ponds or manage bodies of water. On this page you can learn some interesting facts about dicamba, it’s mode of action and benefits. You can also access this page to shop our recommended products which contain Diquat.

What is Diquat?

Diquat (chemical name: 6,7-Dihydrodipyrido[1,2-a:2',1'-c]pyrazinediium dibromide) is a non-volatile herbicidal active ingredient used as a general herbicide to control weeds in commercial greenhouses and nurseries, ornamental seed crops, landscape, industrial, recreational, commercial, residential, and public areas; turf renovation (all turf areas except commercial sod farms); dormant established turfgrass (such as bermudagrass and zoysiagrass); and aquatic areas.

Diquat's original form is a colorless to yellow crystal that is red when mixed as a solution. It is odorless. It is highly soluble in water and has a high affinity for soil. Formulations meant for aquatic weed management are usually liquid.

How Does Diquat Work?

Mode of Action

Diquats mode of action involves disrupting cell membranes and interfering with photosynthesis. It is a non-selective herbicide and will kill a wide variety of plants on contact. Diquat is referred to as a desiccant because it causes a leaf or an entire plant to dry out quickly. 

It is used to desiccate potato vines and seed crops for agricultural farmers, to control the flowering of sugarcane plants, and for industrial and aquatic weed control.

Benefits of Diquat

Diquat acts quickly and kills on contact, causing injury only to the parts of the plant to which it is applied.

Diquat is best used to control aquatic weeds that are interfering with recreation and aesthetics in ponds, lakes and other managed water bodies. It is non-selective so you should also use it when you don't mind all plants dyings.

Drawbacks of Diquat

Diquat is not systemic, meaning it does not move throughout the target plant; it will only kill parts of the plants that it contacts.  It is not residual, so it does not leave any trace of herbicide on or in plants, soil, or water which helps to continue killing any other emerging plants.

Do not use Diquat in large amounts on a water body, especially if you have fish and lots of aquatic life in the water.

Is Diquat Safe?

Diquat is safe to use when applied according to the label directions. Diquat dibromide binds strongly with soil and has low mobility in the environment. To minimize toxicity to fish and aquatic life, follow the label and treat ponds in sections rather than all at once. 

Make sure to wear personal protective equipment prior to mixing or handling Diquat products (wear gloves, long-sleeved clothing, protective eyewear and a safety mask)

What To Expect

Aquatic weed spraying with Diquat

Following Diquat treatment, the product works immediately upon contact to the target weeds. Plants will die within a week. When applying on water bodies, it is best to treat in sections rather than all at once. Wait 10 to 14 days before making sectional treatments.

Featured Products

Diquat Dibromide Aquatic Herbicide - Diquat is an industrial weed killer to control pond weeds, pond algae, and other aquatic weeds. We carry Alligare Diquat which is a generic of Reward Herbicide and much more cost-effective. Diquat is a weed killer concentrate that needs to be mixed with water before application. You will not find a safer aquatic herbicide to kill pond weeds and algae.

Weedtrine D Aquatic Herbicide - Weedtrine D Aquatic Herbicide is a broad-spectrum liquid aquatic herbicide for use in and around still lakes, ponds, lagoons, ditches, non-crop, or non-planted areas controlling a broad range of filamentous algae and submerged and floating aquatic weeds.

Questions and Answers
  1. Q:I want to use Duquat in 3' deep water, can I mix it 50/50 with water and use a compressed lawn sprayer with the nozzle under water? The weeds are mainly submersed. Or is there a better way?
  1. Size:
    Alligare Diquat Herbicide
    $29.04 - $161.09
  2. Size:
    Weedtrine D Aquatic Herbicide
    $78.21 - $78.21
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