Aquacide Blog — Hydrothol Granular

Aquatic Weed Control: 3 Ways To Kill Horned Pondweed

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Horned Pondweed (Zannichellia palustris) is a submersed aquatic weed found in every state in the continental United States. It can be found in shallow freshwater lakes and ponds. Horned Pondweed is a delicate, underwater perennial with branched slender stems that sprout from creeping rhizomes. Long thread-like leaves are smooth edged without teeth. They grow from ½ to 3 inches long and are oppositely arranged or whorled on the stem. Leaves gradually taper to a point at the tip. Tiny banana shaped, slightly curved seeds are flattish in shape and serrated on one side.  They attach to the stem at the...

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Aquatic Weed Control: 4 Ways to Kill Bushy Pondweed

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One of the most common submersed lake weeds is Bushy Pondweed. Bushy Pondweed is an annual weed that grows from the pond bottom. It has thread-like narrow leaves ½” long and oppositely arranged, or whorled in groups of 3 on slender sparsely branched stems. Lake weed identification can be made by the microscopic teeth along the leaves edge. Single seeds are found at the leaf base. This water weed can be found growing in depths of 10 feet or more. Bushy Pondweed reproduces from seed and fragmentation (tiny pieces of water weed that re-root). It grows in any pond or...

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Aquatic Weed Control: Crested Floating Heart

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Crested Floating Heart is native to Asia, introduced to the U.S. through aquatic plant nurseries that still market these plants today. It escaped from cultivation in the 1990’s and has been an aquatic nuisance established in public waterways in Florida for years. Today, Crested Floating Heart is scattered abundantly throughout many southern states with tropical climates. Crested Floating Heart has heart-shaped floating leaves at the ends of long stems that are rooted in submersed sediment. It has slender, tapered clusters of tuberous roots on the underside of it's floating leaves and features a small white 5-petaled flower. These weeds propagate from...

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Controlling Aquatic Exotic Lake Weeds

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WHAT CAN BE DONE TO CONTROL EXOTIC AQUATIC PLANTS? Prevention is the first defense in exotic species control.  However, once an exotic weed has colonized a lake, early detection and a rapid response approach is the most effective method to control the spread of the plant.  What approach works best in a given situation is dependent on several variables.  Many exotic plants are transported on boats and boat trailers.  If you trailer your boat from lake to lake, wash before re-launching. Monitoring is key to early detection.  Plant surveys are often conducted with a global positioning system that allows the...

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