Eurasian Milfoil
Milfoil reproduces extremely rapidly and can infest an entire lake within two years. See Duckweed
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Eurasian watermilfoil (Myriophyllum spicatum) is actually a very attractive plant with a somewhat feathery underwater foliage. Believe it or not, this often loathed species was once commonly sold as an aquarium plant. Indeed it is a beautiful formed plant with very delicate profile but this naturally appeal is lost when pond and lake owners are confronted with a huge area of infestation or choking tentacles of this plant. Eurasian watermilfoil, or sometimes called just milfoil, originates from Europe and Asia, but was introduced to North America many years ago and is now found over much of the Canada and the United States. This plant was introduced to North America as long ago as the 1940s, but it may have actually arrived as early as the late 1800s.

While the chemical control of Eurasian Milfoil is always possible with the use of strong chemicals; more and more people want to get rid of Eurasian Milfoil naturally without using any harmful chemicals. The pond owner of today, confronted with weeds or un-wanted algae growth, tens to want to clear the pond and remove these weeds naturally without using harsh chemicals that can kill fish and destroy the shoreline wildlife habitat.

LAKE RAKEŸ Uproots Aquatic Weeds All-aluminum rake is ideal for the seasonal weeding of lakes, ponds or golf course water traps. Rake head is 36in. L and has 37 heavy duty tines with woven wire for uprooting tough aquatic weeds. 66in. powder-coated aluminum handle. Includes 50ft. rope line. U.S.A. Max. Width (in.): 36, Material: Powder coated aluminum, Tines (qty.): 37, Includes: 50 ft rope line

Midwest Rake Aquatic Weed Eradicator (AWE), Model# 87028NT Excellent for controlling lake and pond weeds. Simply skim the AWE weed rake across the water and let it sink. Retrieve with a short push-pull action and drop the weeds on the shore. Its that easy! Application: Bottom cutting, Max. Width (in.): 28, Material: Steel serrated aluminum, Handle Type: Powder coated aluminum, Handle Length (in.): 11 ft Bottom-cutting rake removes weeds at their source No need for chemicals Sturdy 28in. steel serrated cutting blade stands up to heavy weed loads 11-ft. two-piece powder-coated aluminum handle Features pushpin splice for easy assembly and disassembly U.S.A. Model 87028NT

 

Herbicies and Chemicals for Killing Milfoil and Pond Weeds Available only in USA. Prices includes shipping under HAZMAT consideration.

25 Pound Supply - AQK Highly-Selective Granular Herbicide - $800 Item # PR-AQT21 Apply 10 lbs per 1/3 to 1/2 acre. Use according to instructions. Selective contact control for submerged aquatic weeds, including Milfoil, Najas species, coontail and most pond weed species. The granular formulation is best for spot treating small weed patches and deep growing plants. For best results on killing Milfoil use when water temperature is above 65 degrees F. Some water use restrictions apply. Besides Milfoil this combats Potamos SP., Najadaceae, Myriophylles, Ceratophyllum,

2.5 Gallon Supply - Fast-Acting Contact Herbicide 35% Diquat - $900 Item # PR-RW26 Apply 1 to 2 gallons per surface acre. Use according to instructions. Less selective than the granular herbacide this is a fast-acting herbicide with a 24 to 36 hour burndown. Not for use in turbid waters it also a carries a 14 day irrigation restriction. Apply on a sunny day to actively growing weeds at a rate of 1 to 2 gallons per acre. Besides Milfoil this combats Cattails, Duckweed, Elodea, Potamos SP., Najadaceae, Myriophylles, Ceratophyllum, Bladderwprt, Utricularia SP.

In certain states, herbicides and algaecides are restricted. These products cannot be sold into the states of California, Conneticut, Iowa, Maine, Michegan, Nebraska, Montana, New Hampshire, New York, Vermont or Washington. Secure Shopping with Credit Card or Paypal® using the Secure Servers of Paypal®

Herbicides and Chemicals for Killing Duckweed and Pond Weeds White Cap Selective Herbicide Control aquatic weeds and grasses in fresh water ponds, lakes, and drainage/irrigation canals with WhiteCap™ SC selective herbicide, a proven reformulation of the popular active ingredient fluridone. WhiteCap effectively controls a wide range of floating, submersed and emersed aquatic vegetation, including duckweed. Controls: Duckweed, Hydrilla, Bladderwort, Watermilfoil, Naiad, Elodea, Water-lily, Pondweed, and Coontail See The List of Aquatic Weeds that White Cap SC will control before you buy. Email us if you're not sure! DOWNLOAD THE WHITE CAPFULL INSTRUCTION, WARNING & WARNINGS

8 Ounce Supply - White Cap Highly-Selective Duckweed Herbicide - $229 Price includes shipping. Item # PR-WC8 Apply 8 ounces per 600,000 gallons (1.9 feet acres) approx. Control aquatic weeds and grasses in fresh water ponds, lakes, and drainage/irrigation canals with WhiteCap™ SC selective herbicide, a proven reformulation of the popular active ingredient fluridone. WhiteCap effectively controls a wide range of floating, submersed and emersed aquatic vegetation, including duckweed. Controls: Hydrilla, Bladderwort, Watermilfoil, Naiad, Elodea, Water-lily, Pondweed, Coontail and Duckweed 16 Ounce Supply - White Cap Highly-Selective Duckweed Herbicide - $439 Price includes shipping. Item # PR-WC16 Apply 8 ounces per 600,000 gallons (1.9 feet acres) approx. Apply 16 ounces per 1.2 million gallons (3.7 feet acres) approx. Control aquatic weeds and grasses in fresh water ponds, lakes, and drainage/irrigation canals with WhiteCap™ SC selective herbicide, a proven reformulation of the popular active ingredient fluridone. WhiteCap effectively controls a wide range of floating, submersed and emersed aquatic vegetation, including duckweed. Controls: Hydrilla, Bladderwort, Watermilfoil, Naiad, Elodea, Water-lily, Pondweed, Coontail and Duckweed 32 Ounce Supply - White Cap Highly-Selective Duckweed Herbicide - $799 Price includes shipping. Item # PR-WC32 Apply 8 ounces per 600,000 gallons (1.9 feet acres) approx. Apply 16 ounces per 1.2 million gallons (3.7 feet acres) approx. Apply 32 ounces per 2.5 million gallons (7.7 feet acres) approx. Control aquatic weeds and grasses in fresh water ponds, lakes, and drainage/irrigation canals with WhiteCap™ SC selective herbicide, a proven reformulation of the popular active ingredient fluridone. WhiteCap effectively controls a wide range of floating, submersed and emersed aquatic vegetation, including duckweed. Controls: Hydrilla, Bladderwort, Watermilfoil, Naiad, Elodea, Water-lily, Pondweed, Coontail and Duckweed

128 Ounce (1 Gallon) Supply - White Cap Highly-Selective Duckweed Herbicide - $1,795 Price includes shipping. Item # PR-WC128 Apply 32 ounces per 2.5 million gallons (7.7 feet acres) approx. Apply 64 ounces per 5 million gallons (15 feet acres) approx. Apply 128 ounces per 10 million gallons (31 feet acres) approx. Control aquatic weeds and grasses in fresh water ponds, lakes, and drainage/irrigation canals with WhiteCap™ SC selective herbicide, a proven reformulation of the popular active ingredient fluridone. WhiteCap effectively controls a wide range of floating, submersed and emersed aquatic vegetation, including duckweed. Controls: Hydrilla, Bladderwort, Watermilfoil, Naiad, Elodea, Water-lily, Pondweed, Coontail and Duckweed

Vascular Aquatic Plants Controlled by WhiteCap Floating Plants Emersed Plants Submersed Plants Shoreline Grasses common duckweed (Lemna minor) spatterdock (Nuphar luteum) bladderwort (Utricularia spp.) paragrass (Urochloa mutica) water-lily (Nymphaea spp) common coontail (Ceratophyllum demersum) common elodea (Elodea canadensis) egeria, Brazilian elodea (Egeria densa) fanwort, cabomba (Cabomba caroliniana) hydrilla (Hydrilla verticillata) naiad (Najas spp.) pondweed (Potamogeton spp., except Illinois pondweed) watermilfoil (Myriophyllum spp., except variable-leaf milfoil) DOWNLOAD THE WHITE CAP LABEL WITH APPLICATION INFO IN PDF FORMAT Available only in USA. In certain states, herbicides and algaecides are restricted. Secure Shopping with Credit Card or Paypal® using the Secure Servers of Paypal®

Aeration can be very good for tool in assisting with the controlling of milfoil, but it needs to be effective and well-placed aeration. I've seen many friends and clients who want to build a cheap DIY aeration system who buy a 1/4 HP Gast compressor and run some poly pipe into their pond with a cheap airstone sitting in a bucket of rocks and they are convinced that this is the type of aerator that the gang of buddies at PondBoss.com would recommend to set up a cheap aerator! Sure there are ways to add aeration to a pond or even a lake, we've aerated some large 25 acre lakes with no problem...well...it costs a lot of money to fix the problems of blue-green algae and do what they call bio-dredging with the combination of natural liquid bacteria and aeration systems. Of course many companies are flaunting their dry bacteria but the dry bacteria mixes on the market today are so variable that you must be careful which pond bacteria you buy! It is best to check the reviews of the product you buy and often the reviews are provided by the manufacturers or the distributors....if you have any questions on the quality of the bacteria you want to put in to your pond feel free to contact us to help decide if it is worth the money they want to take from you!.

We have a black-list of dealers and stores who are attempting to sell poor quality enzymes and cultures and a list of those reputable suppliers of natural pond bacteria who sell retail and wholesale. Pond dyes and pond dyes with enzymes sound like they can create conditions that reduce or eliminate the Eurasian Milfoil and other aquatic weeds and algae but be careful when choosing this inexpensive solution as it often requires repeat treatments!

But regardless of the claims of natural bacteria for controlling weeds we must understand that using liquid or dry bacteria cultures for eliminating or controlling Eurasian Milfoil you should be prepared for a long term treatment and not a miracle cure. Poison chemicals will work quickly but they will also kill frigs, fish and endanger pets. Undertaking a long-term and natural approach to dealing with the unwanted growth in your pond requires more patience but also is the winning strategy in the long run! How does the installation of an aerator, in a large lake for example, address the problem of aquatic weeds?

As we have seen aeration can be very good at controlling Eurasian Milfoil, however it needs to be effective and efficient aeration. When we talk about effective or efficient aeration we mean that such aeratio can assist in nutrients like phosphorous adhering to other elements and precipitating out of the system–thus leaving nutrients like phosphorous unavailable as a nutrient source for the Eurasian Milfoil, often a food source for lakes and ponds with Blue Green Algae.

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Along with the side reduced amount of available P or phosphorous for un-wanted plant growth – the addition of aeration and circulation promotes many other effects. One thing it will do is to keep the nutrients and organic molecules in suspension. By keeping these organic molecules; that is leaves and bottom muck and smelly pond bottom muck in suspension; beneficial microbes, wether added or by supplemental growth due to the addition of oxygen or from the addition of an aerator will have a positive effect.

Microbes are better at competing for soluble nutrients than are typical pond plants which means you have competition for food and nutrients adding a second component to the "control" equation. The circulation caused by the aeration system, whether it is a turn-key system or a homemade aeration system, will have an effect on the Eurasian Milfoil, however we have yet to see that there is proof beyond a reasonable doubt that Eurasian Milfoil can be controlled by the use of a simple aeration system. From what we have seen, simply moving the water, or creating the circulation effect by adding a bottom mounted diffuser, does not alter the ecosystem of a pond enough to make generally slow the intrusion of the Eurasian Milfoil species.

With the addition of a shore mounted air-compressor and an efficient diffuser system you will find that this creation of movement is the most crucial factor in controlling Eurasian Milfoil. There is no real conclusive evidence to conclude that the addition of moving water will eliminate the growth of Eurasian Milfoil but the alteration of the ecosystem by the addition of the water movement of an aerator that will eliminate any stagnant waters and once that happens more natural organisms are able to thrive and while Eurasian Milfoil doesn't have any natural predators there can be natural insects like mites that will feed on them! Let us look at how the circulation component, which also adds a considerable amount of oxygen, can create a positive alteration of the aquatic ecosystem.

While it can promote a continuation of the natural pond and lake turn-over cycles and helps to control, but not eliminate, Eurasian Milfoil though does not have structures designed to over-winter: There is a shortage of pertinent information regarding controlling string algae, matt algae and other nuisance plant growth and we have seen more and more people looking for alternative treatments for Eurasian Milfoil as opposed to using harsh poisons and chemicals and algaecides. We are seeing more and more people using the benefits of aeration and water circulation to help slow and somewhat control the infestation and spread of Eurasian Milfoil.

A long term approach is the best approach; dealing with issues of shoreline erosion are a good start as is the entire management of the watershed. Practices that avoid the influx of Phosphorous will help as will helping reduce bottom muck and build-up on the pond bottom; thus, using beneficial bacteria and aeration, while it may not be the miracle cure that most of us are after, it is still one of the best long-term approaches to dealing with this pesky plant! A good supportive strategy of lake management has, in many cases, been able to transform a milfoil infested lake into a thriving and very beautiful aquatic habitat.

Patience...



Eurasian Milfoil Websites
Here are some websites we recommend if you are looking for more information.

Washington State Department of Ecology
http://www.ecy.wa.gov/programs/wq/plants/weeds/milfoil.html
Once milfoil becomes well-established within a waterbody, it is difficult or impossible to remove. In smaller waterbodies (350 acres or less), we have had some limited success using an aquatic herbicide called Sonar® to remove milfoil. Recently the state legislature gave limited approval for the use of 2,4-D to control pioneering milfoil infestations. Other control methods include: Harvesting, rotovation (underwater rototilling), installation of bottom barriers, diver hand pulling, diver dredging, and in some very limited situations the use of triploid (sterile) grass carp. We are investigating other biological controls such as the milfoil weevil. The management of milfoil costs the state and private individuals up-to-one million dollars per year.

Other Federal Government Websites
Eurasian Water Milfoil
USDA. APHIS. Cooperative Agricultural Pest Survey. National Agricultural Pest Information System.
Photographs; Distribution; Special Note: Links to other sites

Eurasian Watermilfoil - Invasive Plants: Changing the Landscape of America
Federal Interagency Committee for the Management of Noxious and Exotic Weeds.
Identification/Description; Photographs; Introduction History; Impacts; Distribution

Myriophyllum spicatum
Integrated Taxonomic Information System.
Taxonomy

Eurasian Watermilfoil - Plant Invaders of Mid-Atlantic Natural Areas (2002)
DOI. National Park Service and Fish and Wildlife Service.
Identification/Description; Photographs; Distribution; Introduction History; Impacts; Controls

Whole-Lake Applications of Sonar for Selective Control of Eurasian Watermilfoil, Feb 2001, ERDC/EL TR-01-7 (PDF | 895 KB)
United States Army Corps of Engineers. Engineer Research and Development Center.
Controls; Research

Eurasian watermilfoil - Aquatic Plant Information System (APIS)
United States Army Corps of Engineers. Engineer Research and Development Center. Environmental Laboratory.
Identification/Description; Introduction History; Impacts; Habitat; Distribution; Dispersion; Controls

Myriophyllum spicatum L. (Eurasian Watermilfoil) - Noxious and Nuisance Plant Management Information System (PMIS)
United States Army Corps of Engineers. Engineer Research and Development Center. Environmental Laboratory.
Identification/Description; Photographs; Introduction History; Impacts; Distribution

Predicting the Invasion of Eurasian Watermilfoil into Northern Lakes, Technical Report A-99-2, Feb 1999 (PDF | 458 KB)
United States Army Corps of Engineers. Waterways Experiment Station.
Controls; Research

Foiling Watermilfoil (Mar 1999)
USDA. Agricultural Research Service.
Controls; Research

Myriophyllum spicatum Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research; Special Note: NAL Catalog Search (resources)

Myriophyllum spicatum - Germplasm Resources Information Network (GRIN)
USDA. ARS. National Genetic Resources Program.
Taxonomy; Legal Aspects

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