Web Analytics Made Easy - Statcounter
Preserving the health and beauty of our lake
Loon Enviro Lac Gauvreau
Logo for Enviro Lac Gauvreau

Enviro Lac Gauvreau

Strategies to Control Eurasian Watermilfoil


Stacks Image 1157
Newred copy The Enviro Lac Gauvreau Milfoil Task Force has been working on the best methods to directly treat milfoil, including weed pulling tools and burlap mats.

We are all familiar with the problems caused by the proliferation of the Eurasian Milfoil in our lake over the past few years. Enviro lac Gauvreau's plans to deal with this have followed
two tracks: measures designed to slow the spread of the weed—such as buoys, boating restrictions, etc.—and direct treatment.


A- A A+
CLICK ON TABS BELOW
    grass Methods to control of Eurasian Milfoil
    Milfoil Task Force explores best practices and specialized tools to control milfoil
    Stacks Image 1477

    Residents use a "Weed Ripper" rake

    We are all familiar with the problems caused by the proliferation of Eurasian Milfoil in our lake over the past few years. As such, our Milfoil Task Force has been working on the best approaches to directly treat this pervasive weed. We had hoped to issue clear guidelines this Spring, but regulatory barriers have temporarily delayed this step forward.

    Our plans to control milfoil have followed two tracks: 1) measures designed to slow the spread of the weed—such as buoys, boating restrictions, etc. and 2) direct treatment.

    Research indicates that clearing limited areas adjacent to the shoreline can best be accomplished in 2 ways:

    1. by careful manual removal methods and
    2. by covering some areas with burlap


    Devices for removing milfoil
    The Task Force has explored the use of specialized milfoil control tools and has accumulated a set of best practices which have been effective elsewhere. One of the best devices found so far is the "Weed-Ripper" (click on the corresponding green tab below). Great care must be taken to ensure weeds are pulled out by the roots, and any fragments harvested and destroyed.

    Burlap
    Similarly, the Task Force is exploring how best to apply burlap effectively to cover limited areas (click on the corresponding green tab below).

    Unfortunately, Provincial regulations currently prevent these measures without obtaining government permits for each separate activity. The process for obtaining permits is expensive and time consuming; we are looking into that as well.

    Your Association is endeavouring to clarify the situation and provide guidance. In the meantime, we urge all residents to follow boating guidelines to limit the spread of this invasive weed on our lake until more active methods of control can be applied.
    CLICK ON TABS BELOW TO READ MORE

    Weed pulling devices - "Weed-Ripper" & "T-Weeder Tool"

    "Weed-Ripper" & "T-Weeder Tool"

    Weed-Ripper | Aquatic Weed Pulling Tool available on amazon.ca with 4 foot & 11 foot handles - The Weed-Ripper is a unique tool designed to pull aquatic weeds by the roots so they cannot grow back as quickly. It features a 3 foot white heavy duty aluminum head. Includes 27 ft rope for throwing.
    > https://www.amazon.ca/Shore-Tech-industries-WeedRipper-Aquatic-Remover/dp/B07G3L19QR?th=1

    Weed-Ripper | Aquatic Weed Pulling Tool available on weedersdigest.com (US) with 4, 7, 11 & 11 foot handles - The Weed-Ripper is a unique tool designed to pull aquatic weeds by the roots so they cannot grow back as quickly. It features a 3 foot white heavy duty aluminum head. Includes 27 ft rope for throwing.
    > https://weedersdigest.com/weed-ripper-aquatic-weed-pulling-tool/

    T-Weeder Tool - The aluminum T-Weeder 'teeth' are what allows it to pull out weeds for long-term weed removal. For buyers in Canada an additional international shipping cost of $30.00 is included in the price. Price Does Not Include any import fees or taxes.
    > https://tweedertool.com




    Weed control using burlap

    Weed control using DIY Dock Kit burlap mats (Ottawa-based company)

    > https://block-aid.ca/pages/burlap-kits

    An effective way to control milfoil is to smother the weed beds by covering them with biodegradable burlap (jute) and weighing the corners down with biodegradable sandbags. The burlap process kills the Milfoil off by holding the frail Milfoil plant to the lake bottom. Tested by ABV des 7, local company Block-Aid has invented the DIY Dock Kit that includes a burlap fabric sheet which covers a 12.5 ft wide X 33ft long (3.8m X 10m) area along with 18 empty burlap sand bags and instructions.
    Stacks Image 1324
    Uline.ca burlap rolls and squares

    > https://www.uline.ca/BL_362/Burlap-Rolls-and-Squares

    Some lake residents have reported success using burlap rolls ordered from this Canadian company.
    What you can do to prevent the spread of milfoil
    • Learn how to identify Eurasian water-milfoil and how to prevent accidentally spreading this plant with your watercraft or fishing equipment.
    • Avoid infested areas or reduce your speed when travelling near Eurasian water-milfoil infestations. Your propeller can break off fragments and spread the pieces to new areas. New plants can grow from small pieces of the plant.
    • Inspect your boat, trailer and equipment after each use. Remove all plants, animals and mud before moving to a new waterbody.
    • Avoid planting Eurasian water-milfoil in your aquarium or water garden. Aquarium hobbyists and water gardeners should only use native or non-invasive plants and are encouraged to ask retailers for plants that are not invasive.
    • Never release unwanted aquarium plants or pets. Return or donate unwanted plants to a garden centre or pet store, or put them in the garbage. Do not put them in the compost or discard them in natural areas. Discarded plants may produce seeds that can sprout.
    • If you’ve seen Eurasian water-milfoil or other invasive species in Lac Gauvreau, please contact Enviro Lac Gauvreau at enviro.gauvreau@gmail.com to report a sighting.
    Source: Eurasian water milfoil, Government of Ontario
    CLICK ON TABS BELOW

    Dos and don'ts

    Our lake is in a fragile state. We are currently combatting an invasion of ​Eurasian milfoil​, which is a highly aggressive, fast spreading aquatic plant. Please help us preserve the health of our lake by following these simple recommendations:

    • Wash all boats (including canoes and kayaks and water toys) ​thoroughly before putting them in the water. Cross-contamination between lakes contributes to the spreading of the Eurasian Milfoil.
    • Avoid boating, fishing and swimming ​in all areas marked by a buoy and areas dense in weeds. Any movement contributes to fragmentation and spreading of the weeds.
    • Do not pull out weeds by hand ​in shallow areas, as it will contribute to fragmentation and spreading of the weeds.
    The water is tested regularly and is rated excellent for swimming (Source)

    Boy-oh-Buoy Honour Roll

    The following have contributed one or more buoys to help control Eurasian Milfoil in Lac Gauvreau:
    Ian Arnold
    Tamsin Roach
    Janice Price
    Earl Renton
    Thomas & Hedy Wolstenholme
    Diane & Ian Rutherford
    Linda Erickson
    Charles Khazzam
    Jane Touzel
    Leanne Olson
    Caitlin McLachlan
    Réjean Belcourt
    Alise Bowler
    Rink de Lange
    Christina McNiven
    Al & Adrienne Aho
    Doug & Dixie Robbie
    Claire Gauvreau
    Rick Farrah
    grass What is Eurasian watermilfoil?
    Eurasian watermilfoil: the "zombie weed" that won't go away
    Stacks Image 1295
    Where is it found?
    Myriophyllum spicatum
    , commonly known as Eurasian watermilfoil (moniker "zombie weed") is an invasive weed found in six provinces across Canada: British Columbia, Manitoba, Ontario, Quebec, New Brunswick and Prince Edward Island (source). It is found in all the Great Lakes and throughout much of the United States (source).

    How does it spread?
    It inherits the zombie nickname for good reason. Even the tiniest fragment torn from a parent plant can root anywhere up to 10 metres deep (source). It can also drift from one body of water to another and can be transported by watercraft, trailers, fishing gear and even by migratory birds from one waterway to another (source). Motorboats with their fast turning propellers and wakes can chop up and spread the weed very efficiently (source) (source). Many boaters don't clean their vessel carefully enough (or at all) before moving it from one body of water to another, and the plant can survive more than 24 hours attached to a propeller or a paddle. (source) Canoe and kayak paddles and swimmers can stir and break up the weed beds when they travel close to shore.

    What does it do?
    The highly invasive milfoil grows and spreads rapidly, choking out native water plant species and lowering oxygen levels so that certain species of fish are driven away. Within a relatively short period, the weed beds create tangled, oxygen-starved mats that are inhospitable to marine life and that impede use by boats and swimmers. When the thick weed beds die each fall, the dead refuse drifts to the lake bottom, contributing to premature aging and eventual death of the lake (see the article Eutrophication).
    CLICK ON TAB BELOW

    Response and Strategies

    Response and strategies
    By all accounts, the Quebec government seems to be so overwhelmed by environmental catastrophes that it doesn’t have the resources to deal with many of them. So budget measures have reduced or eliminated monitoring of some environmental issues that it considers less important than others or are just too costly to address. For example, since 2013 Québec has stopped publishing the province's blue-green algae advisories at the time of occurrence. Instead, the province now only lists advisories once a year in an annual report (source). Moreover, only lakes that provide drinking water to residents are monitored now for blue-green algae blooms in Quebec.The rapid and pervasive spread of milfoil has proven to be far too costly and out of hand to manage by the Quebec Government.

    Good news
    It is encouraging that Enviro Lac Gauvreau received a sizeable grant through the La Pêche Municipality Green Fund for Urgent action for the environmental health of Lac Gauvreau, Phase 1. Among other initiatives, activities include:
    • shoreline characterization and restoration to reduce the influx of nutrients;
    • participation in the water testing program; and
    • seeking out scientific expertise and guidance to ensure projects to improve the environmental health of Lac Gauvreau are viable and effective.
    A comprehensive report published by Radio-Canada in January 2021 titled Myriophylle à épis : une bataille sous-marine explores the history of this pervasive weed in Quebec and reports promising initiatives and sustained strategies to slow down its spread. Read this translated version.

    A local company Block-Aid provides a range of products to mitigate the spread of milfoil. Ottawa residents Rob Perrins and John Cooke came up with a burlap dispensing boat they call Block-Aid LakeSaver to fight the invasive Eurasian watermilfoil. Engineer Rob Perrins is a cottage owner at Lac Bernard. John Cooke is an Ottawa business manager. After an unsuccessful campaign in 2018 to raise funds through the Kickstarter website, the two entrepreneurs pitched their idea to the National Capital Commission.
    cabin Milfoil & home value
    Impact of Eurasion milfoil on home value
    According to an article published on the website of Ottawa-based Block-Aid, studies indicate that waterfront property values on a lake with Eurasian Milfoil will drop by up to 19%. On a typical lake, this can represent >$3.8M loss per 100 cottages. Milfoil will damage the shallow waters of a cottage waterfront reducing the enjoyment and swimming in the area and will harm the lake’s delicate ecosystem. Milfoil will also eliminate critical fish habitats leading to a significant reduction of game fish populations in the given lake.
    >Read the article

    One of a series of articles published in 2018 in Le Droit, titled Invasion de la plante zombie suggested that the depreciation of land values is another detrimental effect of the 'zombie' plant that directly affects waterfront owners. In some Quebec municipalities, the article says, the value of a property with milfoil on its property can be reduced by as much as $100,000 in the real estate market. "Some homeowners with this problem are putting their homes up for sale and are not even able to sell at the price of municipal assessment," says government official Joe Deslauriers. A property valued at $250,000 and about $300,000 in the market will be sold for between $175,000 and $200,000."
    >Read a Google translation of the article
    grass VIDEOS-Milfoil Information session
    1. Information session hosted by Enviro Lac Gauvreau & ABVdes7 - October 1, 2020
    2. Question & Answer session hosted by Enviro Lac Gauvreau & ABVdes7 - October 1, 2020
    links Web links
    Eurasian Watermilfoil Resources
    Eurasian water-milfoil - a formidable enemy - Municipalité de La Pêche
    http://www.villelapeche.qc.ca/en/municipal-services/urban-planning-environment/eurasian-water-milfoil/

    Eurasian milfoil is an invasive weed found in six provinces across Canada: British Columbia, Manitoba, Ontario, Quebec, New Brunswick and Prince Edward Island
    https://www.natureconservancy.ca/en/what-we-do/resource-centre/invasive-species/eurasian-milfoil.html

    The Canadian Council on Invasive Species (CCIS)
    https://canadainvasives.ca/membership/

    Species Hotline at 1-800-563-7711, or visit website
    http://www.invadingspecies.com

    Can grow in 8 - 10 metres of water
    https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=237
    Eurasian watermilfoil (Myriophyllum spicatum) - Species Profile

    Recognizing Eurasian Water-milfoil and Native Look-a-Likes
    https://www.lakegeorgeassociation.org/wp-content/uploads/2017/04/MilfoilLook-a-Likes.pdf

    How do you tell the difference between good milfoil and bad milfoil? Here’s how...
    https://www.lakegeorgeassociation.org/wp-content/uploads/2017/04/nativeversusinvasivemilfoil.pdf

    Block-Aid - a local company with innovative solutions
    https://block-aid.ca

    Ottawa entrepreneurs pitch new technology to kill 'zombie plant' - CBC News
    https://www.cbc.ca/news/canada/ottawa/zombie-plant-invasive-lac-philippe-1.4765000

    Benthic Barriers to control or kill eurasian milfoil (#1)
    https://lakebottomblanket.com/benthic-barriers/

    Benthic Barriers to control or kill eurasian milfoil (#2)
    https://lakestewardsofmaine.org/wp-content/uploads/2018/01/Benthic-Barriers.pdf

    Stopping the spread of the 'zombie plant' - CTV video and article
    https://northernontario.ctvnews.ca/stopping-the-spread-of-the-zombie-plant-1.4483476?cache=yes%3FclipId%3D375756%3FclipId%3D89950

    'Zombie plant' threatening Ontario's lakes - CBC News - Ottawa
    https://www.cbc.ca/news/canada/ottawa/zombie-plant-threatening-ontario-lakes-1.4752264

    Plant that threatens underwater life invades St. John River - CBC News - New Brunswick
    https://www.cbc.ca/news/canada/new-brunswick/invasive-species-eurasian-watermilfoil-st-john-river-1.4605914

    Conservation group urges Canadians not to spread invasive species - CTV News
    https://www.ctvnews.ca/lifestyle/conservation-group-urges-canadians-not-to-spread-invasive-species-1.4040750?cache=yes%3FclipId%3D375756%3FclipId%3D89950

    Myriophyll: An Underwater Battle
    Claude Labbé
    Pier Gagné
    2021-01-16 | Updated on January 21, 2021
    https://ici.radio-canada.ca/nouvelle/1763095/myriophylle-epis-sous-marine
    > Read an English translation of this article

    Quebec invests $8M to combat invasive 'zombie plant' - CBC Montreal
    https://www.cbc.ca/news/canada/montreal/zombie-plant-quebec-investment-1.4751909

    Boats causing invasive species to spread through Sudbury lakes - CBC News
    https://www.cbc.ca/news/canada/sudbury/invasive-species-sudbury-boats-1.3652942

    Weevils no match for invaders: Eurasian milfoil still chokes Sudbury lakes - CBC News
    https://www.cbc.ca/news/canada/sudbury/weevils-milfoil-sudbury-1.3685225

    Pilot project put forward in Sudbury to tackle Eurasian watermilfoil - CBC News
    https://www.cbc.ca/news/canada/sudbury/sudbury-city-council-milfoil-pilot-project-support-1.4309103

    Pilot project to study control method for Eurasian Milfoil on four Sudbury lakes - CBC News
    https://www.cbc.ca/news/canada/sudbury/pilot-project-sudbury-milfoil-1.5171638

    Eurasian Milfoil still hanging around Sudbury lakes (Followup story) - CBC News
    https://www.cbc.ca/news/canada/sudbury/eurasian-milfoil-long-lake-1.4753206

    Ontario's Invasive Species Awareness Program
    http://www.invadingspecies.com/invaders/aquatic-plants/eurasian-water-milfoil/

    Eurasian water milfoil - Government of Ontario
    https://www.ontario.ca/page/eurasian-water-milfoil

An information webinar presented on August 22, 2020 featured a
slideshow presentation on Eurasian watermilfoil as it affects lac Gauvreau.

VIEW SLIDESHOW BELOW


LOADING


NEWS STORIES


Stacks Image 1531

Outaouais research project to study impacts of invasive aquatic plant

July 15, 2022— Alexander Behne · CBC News

Eurasian water-milfoil grows into a thick mat beneath the water’s surface and can be harmful to native plants

A small municipality in the Outaouais, with the help of the province of Quebec, is launching a study to investigate the impacts of an invasive aquatic plant that could be damaging the ecosystems of lakes in the region.

Eurasian water-milfoil grows in dense strands just below the water's surface.

The fast-growing perennial plant poses a threat to aquatic ecosystems due to its aggressive, relentless growth which can crowd out native plants and potentially be harmful to fish communities.
Stacks Image 1543

Milfoil marker buoys repositioned

July 10, 20212— The orange buoys warning of the presence of Milfoil have been repositioned with the assistance of hard working volunteers such as Mark and John, seen in the above photo. Many buoys had drifted during the winter and others disappeared. There are over forty buoys now deployed. Locations will continue to be assessed and they will be moved or more added as appropriate. Please note that the four buoys marking the shallow area in the middle of the lake, halfway between the island and the campsite, mark a milfoil bed and should be left in in place.
Stacks Image 1507

Milfoil Task Force explores best practices and specialized tools to control milfoil

June, 2022 — Enviro Lac Gauvreau's Milfoil Task Force has been working on the best approaches to direct treatment of the pervasive weed. The Task Force had hoped to issue clear guidelines this Spring, but regulatory barriers have temporarily delayed this step forward.

Plans to control milfoil have followed two tracks: 1) measures designed to slow the spread of the weed—such as buoys, boating restrictions, etc. and 2) direct treatment.

Research indicates that clearing limited areas adjacent to the shoreline can best be accomplished in 2 ways:

• by careful manual removal methods and

• by covering some areas with burlap.


Stacks Image 1492

CLICK IMAGE ABOVE TO ENLARGE

Guidelines for Responsible Boating Practices

May 2022 — Enviro Lac Gauvreau formed a sub-committee that included a cross-section of the Lac Gauvreau community to develop responsible boating guidelines to minimize further spread of Eurasian milfoil.

Over the last ten years, the Association has made many efforts to deal with the milfoil issue and the role of watercraft in its spread. These efforts have included buoys delineating “no go” areas for all types of boats, signs to explain the buoys, direct communication with boaters found within the buoyed areas, membership education, professional assistance from
ABV des 7 to explore remediation measures, and financial assistance from the Municipality to enhance the previously noted measures.

We hope that you will adhere to these guidelines in the spirit with which they were developed: to enable us to continue to operate our boats on the lake in a manner that is safe and environmentally friendly.



WATER QUALITY
Good water quality is essential to a healthy lake. Click on the buttons below to learn more.

LAKE NEWS