It tends to be few branched on the lower stem and much branched near the water's surface, forming a mat that blocks out the sun, inhibiting the growth of other aquatic plants and degrading or destroying food sources and habitat for native aquatic wildlife. Thick mats of Eurasian watermilfoil prevent other native plants and native fish species from thriving within the ecosystem. On each leaflet/rachis there are at least 12 individual segments. Leaves have 12 or more thread-like segments. Retrieved from: Eurasian water-milfoil grows rooted in water depths from 1 to 10 meters, generally reaching the surface in depths of 3 to 5 meters. Learn more about the process of. Searching areas colonized by these species may provide early detection, the best method … Eurasian watermilfoil is most commonly found in water 1-3 m deep (~3-10 ft) in lakes, rivers, and ponds, but can occur at depths up to 10 m (~33 ft). New plants can grow from small pieces of the plant. Avoid infested areas or reduce your speed when travelling near Eurasian watermilfoil infestations. Header photo by Alison Fox, University of Florida,, © 2020 Ontario's Invading Species Awareness Program, Due to COVID-19, the OFAH has modified operations. Clean, Drain, Dry your boat, trailer, and equipment after each use. In the fall, when large mats of Eurasian watermilfoil die off, the decaying plants can reduce oxygen levels within the water. Invasive species cause recreational, economic and ecological damage—changing how residents and visitors use and enjoy Minnesota waters.Eurasian watermilfoil impacts: 1. Eurasian watermilfoil (Myriophyllum spicatum) is a perennial aquatic invasive plant that established in the early 1970s in the Okanagan and has spread to select waterbodies in the Thompson/Okanagan, Central Kootenay, East Kootenay, Lower Mainland, and coastal regions. Myriophyllum spicatum Conservation status Least Concern Scientific classification Kingdom: Plantae Clade: Tracheophytes Clade: Angiosperms Clade: Eudicots Order: Saxifragales Family: Haloragaceae Genus: Myriophyllum Species: M. spicatum Binomial name Myriophyllum spicatum L. Myriophyllum spicatum is native to Europe, Asia, and north Africa, but has a wide geographic and climatic distribution among some 57 countries, extending from northern Canada to South Africa. Eurasian Milfoil is an exotic plant, introduced to the U.S. by the aquarium industry. Eurasian watermilfoil has slender stems up to 2.5 m (8.2 ft) long. Return or donate unwanted plants to a garden centre or pet store, or put them in the garbage. Eurasian watermilfoil is threatening Canadian waterways by competing directly with native plants and reducing biodiversity. Myriophyllum spicatum is a submersed aquatic plant that invades lakes, ponds, and other aquatic environments throughout the United States. Eurasian watermilfoil grows in thick, dense mats that crowd out native species, reducing biodiversity, and deoxygenate water when decomposing, killing other aquatic species. The most common native water-milfoil in Wisconsin lakes is northern water-milfoil. Avoid infested areas or reduce your speed when travelling near Eurasian water-milfoil infestations. Identification and Reproduction Identification: Eurasian waterm ilfoil is an herbaceous, perennial, aquatic plant. Eurasian watermilfoil was discovered in Canada in Lake Erie in 1961. Return or donate unwanted plants to a garden centre, pet store, or put them in the garbage. Outside its native range, Eurasian watermilfoil has spread across every continent except Antarctica. Citations. Its leaves are feather-like with 12 or more thin segments (native milfoil has 11 or fewer leaf segments). New plants can grow from small pieces of the plant. How to Identify Eurasian Water-Milfoil • The plant is a perennial that grows under the water surface. Eurasian Watermilfoil Invasive Species Alert - Printable PDF Status and Strategy for Eurasian Watermilfoil Management This document provides in-depth information about Eurasian watermilfoil in the State of Michigan including identification, distribution, management, and control options. Eurasian watermilfoil is a submersed invasive aquatic plant that was inadvertently introduced to Minnesota. Remove all plants, animals, and mud before moving to a new waterbody. The species are very similar, resulting in difficulty in identification using only individual specimens or ones without flowers. Provides unsuitable shelter, food, and nesting habitat for native animals. Sault Ste. • If you’ve seen Eurasian water-milfoil or other invasive species in the wild, please contact the toll-free Invading Species Hotline at 1-800-563-7711, or visit to report a sighting. The following information below link to resources that have been created by external organizations. All species are submersed herbs inhabiting quiet waters or rooted on muddy shores; all have many finely divided leaves. Learn the key ID features of Eurasian watermilfoil. Learn how to identify Eurasian watermilfoil and avoid accidentally spreading this plant with your watercraft or fishing equipment. Scientific Name: Myriophyllum spicatum. Eurasian water-milfoil prefers shallow water 1-3 m deep, but can root in up to 10 m of water. This invasive plant hinders boats from propelling through and often does not provide suitable conditions for fishing. Dense growth of Eurasian watermilfoil along the shoreline may also negatively impact fish and wildlife. The dense growth and occupied surface area can deplete dissolved oxygen levels in shallow areas when the plants decay in fall. The weevil could potentially be a biocontrol agent. Eurasian watermilfoil blooms in late July and early August and has orange/red flowers that are 4–6 mm long. Eurasian Water-Milfoil: Verified and Vouchered: 5551281: Waupaca: 2002: Details: Starkweather Creek East Branch at Milwaukee St -133480: Eurasian Water-Milfoil: Verified: 805100: Dane: 2016: ... ** Fish species - This web page only has a partial list of locations. Learn how to identify Eurasian water-milfoil and how to prevent accidentally spreading this plant with your watercraft or fishing equipment. Currently, Euarsian watermilfoil is present in three Canadian provinces: Ontario, Quebec, and British Columbia. Eurasian watermilfoil can reduce the amount of oxygen within the ecosystem, making it difficult for other species to survive. Eurasian watermilfoil can limit recreational activities on water bodies by forming mats on the water surface, and alter aquatic ecosystems by displacing native plants. Dense mats at the water’s surface inhibit water recreationists. It was most likely brought to this continent in the ballast of a ship and has since spread to almost every continental state and throughout Canada. It has leaves that rise above the surface of the water, while only the terminal flower spike of Eurasian watermilfoil emerges from the water. It can form thick, dense mats that decrease oxygen levels, shade native plants and obstruct recreational activities, negatively impacting human activities and native fish and wildlife. It is capable of rapid dispersion, principally by fragmentation of plant parts. Stands begin to die off in the fall and the New plants develop when the fragments sink, rooting best in protected locations. As an invasive species, Eurasian watermilfoil does not create ‘natural’ habitat. The plants are rooted and the stems grow up to the water surface, usually reaching 3-10 ft. (0.9-3 m) in length and can be as much as 30 ft. (9.1 m) long. Eurasian water-milfoil is an invasive aquatic plant native to Europe, Asia and northern Africa. And although fish may initially experience a favorable edge effect, the characteristics of Eurasian water-milfoil's overabundant growth negate any short-term benefits it may provide fish in healthy waters. Discarded plants may produce seeds that can sprout. The leaves have 12 or more thread-like segments (the native northern milfoil has fewer than 12 threads), and tiny pinkish flowers occur on reddish spikes that stand several inches above the water ; The leaves are feathery and green, and form four-leaf whorls around the stem. The species often establishes itself in slow or still bodies of water with a sand or silt bottom. Reduces oxygen levels in the water, caused by decomposing plants, which can lead to fish die-offs. Marie, ON The recommendation for Eurasian water-milfoil was based upon this literature review [PDF] developed by the department. plant has a well-developed leaf system around the stem and can become extremely dense. Avoid planting Eurasian water milfoil in your aquarium or water garden. Its leaves are feather-like with 12 or more thin segments (native milfoil has 11 or fewer leaf segments). Eurasian water-milfoil is an invasive aquatic plant native to Europe, Asia, and northern Africa. It is a submerged aquatic p… Weed Identification - Eurasian Water Milfoil. Eurasian watermilfoil is a perennial aquatic plant that grows under the water surface. Eurasian watermilfoil prefers shallow It bears a strong resemblance to Eurasin water-milfoil and identification between the two plants can be difficult. The occurrence of sixteen species including Potamogeton illinoensis and Potamogeton pectinatus may be indicaters of conditions suitable for Eurasian water-milfoil invasion. This can alter the species composition of the water which can result in a near monoculture of Eurasian water-milfoil. Find more information on our prevent the spread page. Tiny, reddish flowers grow on spikes 5 to 20 cm long that rise above the water towards late summer (August-September). Invasive parrot feather is common in the aquarium trade. Eurasian water-milfoil was first discovered in Canada in Lake Erie in 1961. MAISRC research on Eurasian watermilfoil focuses on finding biological controls; integrating control with enhancement of native plants; and studying the distribution, ecology, and management of hybrid watermilfoil that arises from Eurasian watermilfoil crossing with the native species, northern watermilfoil. Introduced to North American the 19thcentury, it is now one of the most widely distributed invasive aquatic plants on the continent. It can tolerate a range of salinity, acidity, and temperature. It is rapidly becoming a major nuisance throughout North America. Did you know? The Invasive Species Centre aims to connect stakeholders. For an up to date distribution map of European water-milfoil in Ontario, visit This has lead to a debate about … When large stands begin to die off in the fall, the decaying plants can reduce oxygen levels in the water, potentially affecting the fish communities.