Water Chestnut

Water Chestnut (Trapa natans) Control

Water chestnut is an annual plant. The only part of the plant that survives the winter is the seed. This means if you can limit the number of seeds that are produced by the plant, you can limit the amount of water chestnut plants in future years. This can be done by removing the plants before they have a chance to set seed. Because seeds can remain in the sediment for several years before sprouting, it may take more than one season of control efforts before the "seed bank" (seeds that have accumulated in the bottom sediment) becomes depleted. Fortunately water chestnut does not reproduce by plant fragments. More....

Eurasian Watermilfoil

Eurasian Watermilfoil Control

Once Eurasian watermilfoil is established, there is no known way to completely eradicate it. The best strategy is to control existing stands and limit its spread to other parts of the lake. Since Eurasian watermilfoil spreads by fragmentation, harvesting is not recommended because this may spread it to other parts of the lake. In addition, like lawn mowing, harvesting only reduces the height of the plant temporarily and requires repeated cutting, which can be expensive.

Currently, Eurasian watermilfoil can be controlled using mechanical/physical and or biological controls. More...

Curly Leaf Pondweed

Curly Leaf Pondweed Control

Young curly leaf pondweed plants form under ice cover during late winter, which makes this invasive one of the first nuisance aquatic plants to emerge in the early spring. In the early summer months, curly leaf pondweed forms turions, or hardened stem tips, which over winter and sprout new plants in the spring.

Curly leaf pondweed spreads in many ways: turions, which look like small brown pine cones, are dispersed by water movement; established plants form large colonies from rhizomes; and curly leaf pondweed can also spread by fragmentation. More...