Clipper Archives - Clipper Herbicide

Pond covered with watermeal

Using Clipper to Control Watermeal

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As a new weapon against many common nuisance weeds, Clipper herbicide produces fantastic control with a rapid kill when applied to watermeal. Clipper works fast and with proper application will eliminate all watermeal in the target zone normally within 7 to 14 days.Watermeal prior to Clipper application
There are a few techniques that are listed below which will help maximize the effectiveness of your application;

1) Clipper needs to be applied to all areas where the watermeal is present. Clipper is a potent knock down killer which acts fast and dissipates quickly so good coverage is necessary for complete control.

2) Prepare an attack plan ahead of time making sure to include any hard to reach areas and nooks as part of your treatment zone. A small amount of watermeal that escapes treatment can quickly re-infest the entire pond in weeks so again, complete coverage is necessary.

3) As with any treatment, watermeal that escaped treatment may reappear. If this occurs, a 2nd treatment should be used as soon as the growth appears.

4) Once tank mixed, Clipper begins to degrade fairly rapidly so a fast treatment is needed. Make sure that you have everything in place and ready to go so as to not lose time after mixing.

5) Treating early in the morning is suggested preferably on a calm sunny day.

6) The ideal recommended dose is 1.1lbs per acre foot. Meaning, if your pond is 1 acre large and averages 4 feet deep, your suggested rate will be 4.4 lbs of clipper to eliminate all of the watermeal. Lower doses may be effective but at the preferred rate, you will effectively add enough Clipper to bring your concentration levels to 200ppb, suitable to knock down watermeal.

7) Keep an eye on the shoreline throughout the year for any reintroduction of watermeal. If you see small specks appearing they can usually be controlled with a fast acting knockdown killer such as diquat or spot treat with Clipper. Paying attention to the shoreline will help keep total infestation at bay for a few to many years depending on how aggressive you monitor the pond.

8) As the watermeal die down they are converted to sludge through the decomposition process. Balance the eco system by digesting the excess fuels in the water after treatment and early in the year prior to infestation. A potent bacteria will in essence treat your pond like a large compost and will help accelerate the breakdown of organics plaguing most ponds.

9) Apply a light blocking dye early in the season at least once, simultaneously with a sludge digester. This method of early treatment will maximize the eco balance and will start the pond off properly and in a pre-preparation condition.

10) Keep fertilizers away and never discard grass clippings of leaves into your water.

Clipper Herbicide Course

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So What Can Clipper Herbicide Really do for Me?

Clipper Herbicide in Action


  • New chemistry/MOA in PPO inhibitor
  • High efficacy against Cabomba, Hydrilla including rHydrilla, Duckweed, watermeal
  • Short contact time = fast uptake
  • There and gone within 2-3 days
  • No drinking, fishing, or swimming restrictions


  • Active Ingredient: flumioxazin
  • Mode of Action: Initiates cell membrane disruption
  • Low toxicity (minimal PPE)
  • Good environmental profile
  • 51% WDG (water dispersible granule)

Algae Control

  • Algae types include filamentous algae (Pithophora and Cladophora)
  • 200 ppb target rate
  • Some planktonic control observed
  • Tank mix and rotate

Clipper Herbicide Tackles More Opponent’s

Canal infested with Cabomba cleaned up by Clipper and ready for fun!

Canal infested with cabomba treated with Clipper herbicide before and after.

Canal infested with cabomba treated with Clipper herbicide before and after.

Watermeal covered pond 100% cleared in only 8 days after Clipper Herbicide application.

Watermeal covered pond 100% cleared in only 8 days after Clipper Herbicide application.

Watermeal completely eradicated in only 8 days after Clipper Herbicide Treatment.

Parrotfeather in stream

Clipper vs. Parrotfeather (Clipper wins)

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The aquatic weed Parrotfeather is a rooted weed that generally grown in shallow subsurface areas throughout the United States and many other countries. The plant gets its name from due to its appearance which is usually similar to bunches of leaves that become emergent as the plant matures. The emergent portion of the plant swirls and groups to form a dense mat, thus the name Parrotfeather.Parrotfeather in canal area

The plants are not entirely detrimental to the pond provided growth is not excessive. Letting parrotfeather flourish unattended for years can result in virtually all areas of the pond being completely covered. As the old growth dies down, it begins to decompose which provides nutirents for the aquatic life within the water. Exorbitant amounts of decomposition can lead to oxygen depletion and can have a negative impact on the ponds entire ecosystem.

As Parrotfeather left untamed can become a true nuisance weed, growth control is always preferred since the weed is invasive and there are many alternate, less all consuming, options to add to your aquatic foray.Parrotfeather in stream

Clipper herbicide containing flumioxazin is an excellent choice when dealing with excess Parotfeather infestation. Clipper is a fast acting contact control product that will eradicate all target weeds when applied per labeling. It is best to apply Clipper early in the day and quickly after tank mixing the spray solution. Light blocking aquatic dye’s such as Aquashade can help control growth prior to a Clipper application. Follow all directions on container labels to assure maximum blockage.

Mass Approves Clipper 2014


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MDAR/MassDEP 1 June 2013 -reposted here 2014
(June 2013)

MDAR/MassDEP 2 June 2013
This document is a review of the aquatic herbicide Clipper® (EPA. Reg. No. 59639-161; Valent
Biosciences Corp.). It contains product-specific aspects related to use characterization, inert
formulation ingredients and adjuvants, and toxicity and effects of these ingredients to human
health and non-target organisms. This document complements the MDAR/MassDEP review of
the active ingredient flumioxazin (MDAR/MassDEP 2013).
1. Product Formulation
The product label indicates that the Clipper Herbicide is formulated as water dispersible granules
containing 51% flumioxazin by mass (Valent Corp., 2012). The MSDS document indicates that
the formulation also contains kaolin clay as a carrier at approximately 16% by mass. The identity
of the other ingredients (also referred to as inerts) in Clipper Herbicide is considered proprietary;
therefore, the manufacturer does not identify the other ingredients on the general or supplemental
product labels or material safety data sheets (MSDS).
Proprietary information on the other formulation ingredients was obtained through a request for a
Confidential Statement of Formula. The proprietary ingredients were evaluated as part of this
review, but cannot be disclosed here for reasons of confidentiality.
The product label indicates that treatment of emergent vegetation requires the addition of spray
adjuvants to the tank mix. As directed on the label, only adjuvants labeled for aquatic use should
be utilized. Specific recommendations for adjuvants include those that contain non-ionic
2 Use Characterization
2.1. Use Sites
The product label for the flumioxazin-formulated Clipper Herbicide specifies that this product
may be applied for the control of vegetation in aquatic sites. Clipper Herbicide provides control
of various submerged, emergent, and floating aquatic plants. The product may be applied directly
to the water where there is limited or no outflow, including wetlands, lakes, fresh water ponds
and reservoirs (Valent Corp., 2012).
2.2. Application Methods
Clipper Herbicide is applied as a water-based solution having a pH of 5 to 7. If treating floating
or emerged weeds the addition of an adjuvant to the tank mix is needed. The product may be
broadcast applied to the water surface or injected below the water surface. The label suggests
that early morning applications may enhance weed control. The product may be applied by
backpack or handgun sprayer, airboat, helicopter, airplane or other application equipment that is
MDAR/MassDEP 3 June 2013
capable of thorough coverage of target plant foliage. Subsurface application may be done using
weighted trailing hoses to ensure the release of the herbicide under the surface and throughout
the biomass of aquatic vegetation. In situations where aquatic vegetation is dense, the label
suggests that up to half of the water body be treated at a time to avoid a rapid decrease in
dissolved oxygen caused by vegetation breakdown. It also notes that the remaining area of the
water body can be treated 10 to 14 days later.

Clipper Specifics!

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Here are the specific use details that everyone has been asking for. If you do not see your situation listed here, just ask and we will assist!

Product Used On

drainage ditches
reservoirsDuckweed covered pond without Clipper


alligator weed
water fern
water lettuce
water pennywort
filamentous algae
curlyleaf pondweed
sago pondweed
Eurasian watermilfoil
variable-leaf watermilfoil

State Registrations*

New Hampshire
New Jersey
New Mexico
North Carolina
North Dakota
Puerto Rico
Rhode Island
South Carolina
South Dakota
Washington, DC
West Virginia

Clipper Herbicide is registered for use in the states above. As always, be sure to check to make sure a specific use pattern is ‘ok’ in your location before use. You can contact your local state agency for more information and the latest filings or approvals.

Clipper News! (well, news back then.)

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Clipper™ Aquatic Herbicide Registered for Immediate Application for Use on Invasive Weeds

Provides Aquatic Managers with Much-Needed New Tool for Selective Plant Management

January 4, 2014 (original posting 1+ years ago)

Clipper™ aquatic herbicide and algaecide has recently been registered by the Environmental Protection Agency (EPA) for use to combat a variety of aquatic plant infestations. Clipper™ equips pond and lake service outfits with rapid, highly effective knockdown product for use on nuisance selective weeds and plants. With a fast, effective and much-needed new tool for selective aquatic plant control and resistance management.

Unlike some systemic products (fluridone) which can take months to remediate infestation, Clipper™  is  and is the only PPO inhibitor with proven activity on both floating and submersed plants. Clipper™ provides valuable flexibility for applicators and selectively controls a range of invasive and nuisance weeds and algae. Clipper™ controls:

  1. hydrilla
  2. Eurasian watermilfoil
  3. curlyleaf pondweed
  4. cabomba
  5. duckweed
  6. watermeal and more!

This exciting new technology affords pond and lake owners the ability to take back their pond without risking random shot-in-the dark type application. Clipper plays an important role in herbicide resistance management programs. And, Clipper works rapidly followed by a fast dissipates in the water column. It does not accumulate in sediment.

Clipper™ offers reduced personal protective equipment (PPE) requirements compared to many other products, a convenient package size and a non-corrosive, dry, flowable formulation for easy mixing, transport and application.

“We have helped tens of thousands of pond owners eradicate nuisance weeds with many of those treatments including fluridone based products. Fluridone is systemic and must remain in the water column for quite a while to be effective, and can take time to show desired results.” said Don Tephart, NTB Aquatics, Inc.,  “With Clipper™, the results are night and day and flow isn’t really a major issue, especially compared to the former. It does the job right and is easy to apply. We like what Valent has done here and we plan on using it as part of our complete arsenal against invasive weeds/algae”