Infestation & Response
Investigation & Harvesting
Current Control Methods
Mechanical Harvesting & Fragment Collection
To date, this has been the main method of weed control in the Tahoe Keys – and it hasn’t been successful. The Tahoe Keys Property Owners Association has spent up to $400,000 a year on this method, only to see weeds increase in volume. But with new technology and methodologies, the association aims to reduce fragments created by harvesting that can spread and create new plants. In 2017, TKPOA staff removed 9,996 cubic yards (that's more than 900 dump trucks) of aquatic invasive plants from its lagoons, an undertaking that totaled more than 6,000 man-hours of work.
Bottom barriers, mats designed to smother aquatic invasive weeds, are currently being used in the Tahoe Keys. The Association is allowed a total of five acres of bottom barrier coverage (Tahoe Keys are 172 acres in water-covered area). While effective for small areas, they kill all plants, not just invasive weeds. Bottom barriers are useful for relatively small scale infestations and for individual property owners around their docks. In 2017, the Association placed the largest bottom barrier coverage to date.
By working with property owners to reduce runoff and use of fertilizers on land (the association has banned phosphorous-containing fertilizers), less nutrients will be introduced into the water that may contribute to weed growth. The Lake and Lagoon Friendly Landscaping Campaign, launched in 2016, aims to minimize these nutrients while also generally improving water quality. The association has also created a boat backup station and associated educational materials to reduce the spread of fragments that can create new infestations around the lake