Aquatic Weed Control

Restore Your Waters: Eco-Friendly & Approved Solutions for New Zealand Waterways

Is a suffocating mat of duckweed taking over your farm pond? Are submerged weeds choking your industrial retention pond or waterway? ENACo offers fully EPA-approved and ACVM-registered aquatic weed solutions tailored for New Zealand's unique ecosystem.

Explore Solutions Contact Our Expert Team
The Ultimate Bundle

The Ultimate Aquatic Weed Control Bundle

Pair our EPA-approved herbicide with a premium aquatic surfactant for maximum efficacy and environmental compliance across New Zealand waterways.

Pond with aquatic vegetation and weeds

NZ-Approved Non-Ionic Surfactant

Maximize the efficacy of your Diquat 200SL by pairing it with our premium aquatic-approved non-ionic surfactant. Breaks surface tension, improves rainfastness, and ensures thorough wetting of waxy or floating weed leaves - all while being safe for the environment.

Clear calm lake with mountain reflection

Diquat 200SL X - ACVM Approved

A highly effective, non-selective contact herbicide - the premier choice for controlling both submerged and floating weeds in New Zealand lakes, farm ponds, drains, and retention systems. Fast-acting with eco-friendly microbial breakdown.

Products

Approved Products for New Zealand Waters

Aquatic-Approved Non-Ionic Surfactant

Formulated to enhance weed-killing power without harming water quality. Approved for addition to products registered for use in aquatic situations.

  • Breaks surface tension for thorough leaf wetting
  • Improves rainfastness and reduces wash-off risk
  • Safe formulation for freshwater environments
  • Compatible with glyphosate and diquat aquatic products

Diquat 200SL X Aquatic Herbicide

Fast-acting contact herbicide for submerged and floating weeds. Degrades rapidly in natural waters by microbial breakdown, leaving no toxic residues.

  • ACVM Reg No. P8006
  • HSNO No. HSR000446
  • Approved for freshwater environments
  • Targets green foliage and floating vegetation on contact
Target Weeds

Which Weeds Does This Target?

Our aquatic control package is the perfect solution for New Zealand's most common nuisance weeds.

Duckweed

Lemna minor

Azolla

Azolla pinnata

Salvinia

Free-floating

Broadleaf Weeds

Emergent / marginal

Hornwort

Submerged

Egeria

Egeria densa

Lagarosiphon

Lagarosiphon major

Application Process

How to Apply (New Zealand Guidelines)

For maximum safety and environmental compliance, always follow these best practices for application in NZ waters.

1

Calculate Your Volume

For floating mats, a foliar spray approach is generally used. For submerged weed control in ponds, application is carefully measured per hectare.

2

Mix Correctly

Partly fill your spray tank with clean water, add the Diquat 200SL, then gently add your non-ionic surfactant at label rates, topping up with water.

3

Apply Evenly

Ensure complete, even coverage of actively growing floating weeds for optimal contact herbicide performance.

Aerial view of a waterway

Safety & Restrictions

  • DO NOT use water for drinking, swimming, or fishing for 24 hours post-application.
  • Always check with your local Regional Council to ensure compliance with the Resource Management Act (RMA) or regional pest management rules before discharging chemicals into open water bodies.
  • Follow all label instructions for the herbicide and surfactant products being used.
FAQ

Frequently Asked Questions

Need advice on dosing or application methods for your specific pond or drain? Our expert team is ready to help.

Ask Our Team

Partly fill your spray tank with clean water first, then add the Diquat 200SL herbicide, followed by the non-ionic surfactant at label rates. Top up with water and mix thoroughly. Adding surfactant during filling may cause foaming.

Do not use treated water for drinking, swimming, or fishing for 24 hours post-application. Always refer to the product label for specific withholding periods and restrictions.

Yes - always check with your local Regional Council to ensure compliance with the Resource Management Act (RMA) and any regional pest management rules before discharging chemicals into open water bodies.

An aquatic-approved non-ionic surfactant breaks surface tension, ensuring the herbicide thoroughly wets and adheres to waxy or floating weed leaves. This improves coverage, absorption, and rainfastness - delivering significantly better results than herbicide alone.

Diquat 200SL X degrades rapidly in natural waters by microbial breakdown, leaving no toxic residues. Both products are approved for use in freshwater environments when applied according to label directions. Follow all withholding periods and environmental precautions.

Need Advice on Dosing or Application?

Contact our expert team today to get the right advice for your pond, drain, or waterway. We can help you calculate volumes, select the right products, and ensure full regulatory compliance.

Contact Our Expert Team