Hydrothol® provides control where you need it, in the application area, not away from the target area. annually on hydrilla control. Based on the outcomes of this study, each acre of hydrilla would require between 5-9 harvester-hours to manage hydrilla and its rapid regrowth. Using the aquatic herbicides suggested, you can get control of any aquatic weed species. Boats and other water-recreational vehicles, including boat trailers, must be inspected carefully when they leave a hydrilla infested waterway. The aquatic weed category pages give additional information on the different species and specific treatment instructions and options. It is the only known occurrence of the plant in Wisconsin. For operations that require water intake, hydrilla can pose a problem by clogging the intake pipes. It could initially kill weeds but it could alter the growing conditions of the soil to promote another resistant plant or even damage the microorganisms in the soil that keep the soil "healthy" and functioning properly. Sonar, The Flexible Solution Sonar aquatic herbicide offers both selective and broad-spectrum control capabilities. Millions of dollars are lost due to reduced recreational opportunities as hydrilla mats interfere with boating, swimming, fishing, etc. In flowing waters hydrilla will greatly reduce flow and can cause flooding. For this reason, Hydrothol® is a valuable tool in improving access to the water for recreational activities such as swimming, fishing, and water skiing. In 2007, hydrilla was discovered in a man-made pond in Wisconsin in Marinette County. Today, it is found in many states in the U.S. Hydrilla is an economic drain. Derek Markham is a green living expert who started writing for Treehugger … HYDRILLA, solutions for pond and lake owners! Familiar problematic species include coontail, several pondweed species, bladderwort, hydrilla, and some species of water milfoil, such as Eurasian water milfoil (other species of milfoil are native and much less aggressive). The homemade weed killer "could" be okay for occassional use, but I would not use it on a regular nor a frequent basis. Responsibility of the control of hydrilla lies with the recreational user. The summer of 2019 was one of the largest hydrilla harvest projects ever recorded. Seaweed -- also known as kelp -- is a free and organic fertilizer for those living near the ocean. Taking care of the duckweed before it has time to spread prevents the need for chemical treatments, such as the aquatic herbicide. Also, aquarium hobbyists should never release aquarium plants or fishes into open water. One of the ways to prevent a duckweed infestation is through aeration. 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