NO Invasives!

Be a Weed Watcher…

Help keep Manchaug Pond free of invasive species!  Share the mission of our Aquatic Plant Survey Teams at the boat ramp, dock, campsites, roadsides and along the shore and in the water!

Early detection and removal is the key!

  If we all monitor the pond, we can remove invasives before they spread!

If you see it…

  • pull it or cut it out
  • bag it
  • and dispose of it away from the lake
  • note the location where you found it and contact the MPF Aquatic Plant Survey Teams

JOIN a Manchaug Pond Foundation's Aquatic Plant Survey Team

The MPF has two trained* teams of volunteers who annually survey Manchaug Pond in a 50 plus point grid identifying all submerged aquatic plants, monitoring existing plant varieties, tracking size of weed bed growth, watchful for new invasives, and following up in kayak and snorkel! We want you to join us in our important work in keeping these invasive weeds from Manchaug Pond.

*Training: Special thanks to DCR Lakes and Ponds Program's Tom Flannery and Jim Straub as well as Lycott Environmental.

“On a global basis…the two great destroyers of biodiversity are, first, habitat destruction, and second, invasion by exotic species…”
E.O. Wilson, Strangers in Paradise, 1997
“He who dwells everywhere, Maximus, nowhere dwells.”

Marcus Valerius Martial, AD 86 -103

Watch for Winter Lake-level Drawdown

Since 1990, lake-level drawdown has been employed to control aquatic plants and keep them in check in Manchaug Pond.  The Manchaug Pond Foundation advocates for this no-cost, effective method of weed control with the lake's dam owner.With a shallow shoreline of less than five feet, drawdown offers a good knock down of invasives at beaches and docks.

Control is dependent on depth of drawdown and winter weather which contributes to the freezing and drying of shoreline soils. Snow cover and lack of freezing temperatures can impede to the process.

Invasives ~ Know thy lake’s enemy!

What are invasive species?


Invasive species, Asian Clam, can be successfully controlled with lake-level drawdown.

Our lakes and ponds contain a wide variety of native plants and animals that are essential to a healthy ecosystem.  These native species originated here in new England and are well adapted to our climate and to other species that live here.  however, many “non-native” or “exotic species have been brought here from other parts of the country and the world. Some of these species are considered “invasive” because they are able to dominate or significantly alter an area’s ecology.  Once established, they continue to spread to additional locations by hitching rides on boats, trailers, gear, and in bait buckets.

When invasive species enter a water body, they can have a devastating impact.  Since the local ecosystems has not developed natural controls (animals or other plants to limit their growth) invasive species may spread rapidly.

Why are they harmful?

  • Many invasive plants form dense mats of vegetation that can restrict boating, fishing, and swimming, and make the waterways entirely impassable.
  • Many native plants and animals cannot compete for space or food with exotic species, and are crowded out or eliminated from the area.
  • The aesthetic appeal, recreational value, and surrounding property values may quickly decline as the invasives species take over.
  • The microscopic larval stage of Zebra Mussel and Asian Clam can easily travel undetected in bilge bait and livewell water.  They can proliferate at an alarming rate and frequently destroy boat motors, buoys, and fishing gear.  Their razor sharp shells often create a hazard for beach visitors.

    Manchaug Pond Foundation Water Quality

  • Once invasive plants and animals are established, they are almost impossible to eradicate.

How can you help?

  • Remove all plants and animals from your boat motor, trailer, anchors, fishing gear, and dive gear and dispose of them on dry land, well away from the water or in a trash can.
  • Flush engines and dispose of live-well, bait bucket, and cooling water away from the shore after each use.
  • Never release any plant or animal into a body of water unless it came out of that body of water.
  • Never empty aquariums into a water-body.
  • Inspect and wash your boat, preferably with hot water, and allow it to completely dry before entering another body of water.
  • Be a weed watcher while you’re at the lake and/or join the MPF’s survey teams.

Information courtesy of Massachusetts Department of Conservation and Recreation (DCR) Lakes and Ponds Program

Learn more!

Click on the brochures below to learn more about the lake eco-system and its watershed. Visit our EDUCATION pages for list of resources and games pages for teachers and students of all ages, and brochures about living in a watershed.

Eutrophication and Aquatic Plant Management

Winter Drawdown to Control Eurasion Milfoil

Manchaug Pond Foundation Water Quality

Management under the Wetlands Protection Act

Manchaug Pond Foundation Water Quality

Guide to Selected Non-native Invasive Aquatic Species

NY DEC's Algae Identification Website

Manchaug Pond Foundation Water Quality

DCR Guide to Lake Management

Manchaug Pond Foundation Water Quality

Mass NPS Pollution Management Manual: Chapt. 7 Lake Management

The Most UNWanted!

Let’s keep these invasives out of Manchaug Pond!

If you see, contact us ASAP so the Weed Watcher teams can respond right away! Click the photo for a link to learn more about each non-native invasive.

Eurasian Milfoil

  • Invasives

    Eurasian Milfoil (Myriophyllum spicatum)

  • Invasives

    Diagram of Eurasian milfoil

European Water Chestnut

  • Invasives

    European Water Chestnut (Trapa natans)

  • Water Chestnut Nut

    The “nut” or fruit is about one inch in size with four 1/2″ barbs.

  • Invasives

    Hydrilla (Hydrilla Verticillata)

  • Invasives

    Diagram of hydrilla

Parrot Feather

  • Aquatic Invasives

    Parrot Feather (Myriophyllum aquaticum)

  • Invasives

    Diagram of Parrot Feather

European Naiad

  • Invasives

    European Naiad
    (Najas minor)

  • Invasives

    Diagram of European Naiad

Curly-leaf Pondweed

  • Invasives

    Pondweed (Potamogeton crispus)

  • Invasives

    Diagram of Curly-leaf pondweed


  • Invasives

    South American Waterweed (Egeria densa)

  • Invasives

    Diagram of South American Waterweed

Purple Loosestrife

  • Invasives

    Purple Loosestrife (Lythrum salicaria)

  • Invasives

    Diagram of Purple Loosestrife

Zebra Mussels

  • Invasives

    Zebra mussels on a stick

  • Invasives

    Zebra Mussel
    (Dreissena polymorpha)

Established Invaders we need to keep in check!

Asian Clam

  • Invasives

  • Invasives


  • Invasives

    Fanwort (Cabomba caroliniana)

  • Invasives

    Diagram of Fanwort

Variable Milfoil

  • Invasives

    Variable Milfoil
    (Myriophyllum heterophyllum)

  • Invasives

    Variable Milfoil
    (Myriophyllum heterophyllum)

Yellow Flag Iris

  • Yellow Flag Iris

    Yellow Flag Iris (Iris pseudacorus)

  • Yellow Flag (Iris pseudacorus)

Common Reed

  • Invasives

    Common Reed (Phragmites australis )

  • Invasives

    Diagram of Common Reeds

REMEMBER!  Your activities count: at the lake, on the water, and in the watershed:

  • Fertilize your lawn not the lake or impervious surfaces. Runoff from your landscape will fertilize lake plants causing them to grow.
  • Clean your boats before bringing to the lake. Avoid weedy coves! Your propeller captures, bringing back to your dock where they drop and root.
  • Remove floating weed fragments from lake - dry and burn or compost or bag and dispose
  • Don't bring in beach sand! - A rocky shore inhibits plant growth.
  • Pet waste is a source of bacteria: remove, bag and dispose or bury away from the lake shore.

Manchaug Pond Foundation Education


EEK! don't bring harmful bacteria to the lake. Walk pets away from the lake and shore. Dispose of properly!

Manchaug Pond Foundation Water Quality

Don't fertilize near the lake, on impervious surfaces like driveways, and not before a rain event.

Manchaug Pond Foundation Water Quality

Car washing near water resources does negatively impact the lake! Do it on the lawn or at a professional car wash.