Product Overview

Fast results on a broad range of underwater weeds

Ideal for controlling nuisance aquatic weeds. Tank mix with Cutrine® Plus Algaecide for tough-to-kill weeds

Weedtrine® D Aquatic Herbicide controls submersed, floating and emergent weeds including duckweed. Ideal for a broad range of weeds commonly found in ponds.

  • Quickly dilutes in water
  • Easy-spray application
  • Non-volatile herbicide
  • A surfactant is necessary when using this product with any weed on or above the water surface


Make sure the Applied Biochemist (AB) brand of products in your inventory are currently approved and registered for use in your state.

The Applied Biochemist brand products purchased by SePRO have been in transition from a regulatory process since the acquisition. All are federally registered and all existing AB factory manufactured (non-SePRO manufactured) inventory remains registered. Please visit to check for registered states.

Some of the new SePRO facility produced brand of AB products are still waiting for state registration approval. Although federally approved for many months, state registrations are still required and in process. State registrations are being updated daily. Please visit for the most up to date information. To check the current state registration status for a SePRO brand AB product, choose a product and click “REGISTERED STATES”.

Product Information Sheet

Labels and SDS

Specimen Label

Safety Data Sheet

Registered States


Dosing rates:

  • Submersed weeds: rates vary by species between 5 and 10 gallons per surface acre of vegetation
  • Floating weeds: rates vary by season between 2.5 and 3.75 gallons per surface acre of vegetation
  • Marginal weeds: 5 gallons per surface acre of vegetation
  • Duckweed: 5 gallons per acre of vegetation

Dilute and spray with a small hand-held sprayer.

Use with AB™ Brand Adjuvant on any weed on or above the water surface. Weedtrine® D Aquatic Herbicide is ideal for small ponds. For weed control in larger ponds or lakes, try our more concentrated formula, Harvester® Aquatic Herbicide.

For use in treatment of residential ponds and control of submerged weeds.


Water use is restricted for irrigation, drinking (animal or human) and swimming. See product label for details.

Before & After


"My pond had an over abundant growth of curly pond weed. After two treatments with Weedtrine D, the pond is clear!"

- Eric S. , Customer Review /

"I have used this product for years. It keeps my pond weeds under control and if used properly does not harm fish or wildlife."

- Maire A. , Customer Review /

"Pond was totally covered with Duckweed. After one application, duckweed that was treated was gone after about 2 weeks."

- Brian G. , Customer Review /

Experts in Aquatic Solutions

SePRO’s Technical Specialists are trained to assist you with your toughest issues, from aquatic weeds that keep coming back to nusiance or toxic algae that are plaguing a water body. See how we can help.