Invasive Species

All Area Lakes, Including Yankee Lake, Have Invasive Species

Constant Effort is Required to Manage and Eradicate These Threats

Water Chestnut (Trapa natans)

Water Chestnut (Trapa natans), an invasive aquatic plant, has been identified in our lake. The photo at the top of this page shows how dense this plant can become on a lake, and the work required to eradicate it if not dealt with early and often.

We are grateful to some very vigilant members who, while out boating, not only identified the plant, but also pulled more than 120 of them. This species grows quickly, forming dense mats on the water's surface that are harmful to our lake for the following reasons:

• Blocks sunlight and reduces oxygen, harming fish and native plants.
• Makes boating, fishing, and swimming difficult.
• Crowds out beneficial native plants and disrupts the balance of the lake.
• Drops sharp, spiny seeds that remain viable for up to 12 years.

Because early action is the best way to control this plant, we ask all members to:

• Be vigilant: If you see floating rosettes (clusters of green, saw-toothed leaves), please pull the plant (use gloves!) and report the location as best you can to info@yankee-lake.org. Photos of the area would be helpful as well.
• Although the plant is often found near the shoreline, especially in shallow, calm areas, it can quickly spread out into deeper water.
• Avoid spreading the seeds: Don't contaminate other bodies of water! Clean boats, trailers, and equipment before launching or leaving the lake.

Removal of the Water Chestnut Plant

• Best removal is late June through mid-July, before seeds mature and sink.
• By September, some seeds may already have dropped, so plants should be removed before next year's growth can set in.
• Grab the floating rosette (the leafy circle at the surface). Wear gloves as the seeds have sharp barbs that can cut the skin.
• Pull steadily upward to get as much of the stem and root as possible.
• Use a rake or net for large mats.
• Watch for and try to capture the spiny nutlets—they sink to the bottom and sprout next season.
• If you see them, scoop carefully with a net or by hand (with gloves).
• Bag plants and seeds in heavy plastic bags.
• Dry them out or bring them to a landfill.

Working together, we can prevent this invasive plant from taking over our water and protect the health and enjoyment of the lake for years to come. Because seeds can remain viable for up to 12 years, we will need to continue the monitoring and removal on a consistent basis. Although we need everyone's involvement, we would like to organize a dedicated team of volunteers who could help out on a regular basis. If you are interested, please send us an email at info@yankee-lake.org.

Spotted Lanternfly

The Spotted Lanternfly has been observed in our community. This invasive insect poses a serious threat to trees and plants.

What to Do if You See One:

• Kill it immediately. Stomp, squash, or swat — every lanternfly removed helps slow their spread.
• Check your property. Look on trees, vehicles, decks, and outdoor furniture.
• Destroy egg masses. Egg masses look like mud smears on trees, rocks, or outdoor surfaces. Scrape them into a bag with rubbing alcohol or hand sanitizer, then seal and discard.

Thank you for helping to protect our trees and environment.