Products to Control Chara
|Symmetry is a copper herbicides and can be used in a mixture with RedWing.|
Chara is often called muskgrass or skunkweed because of its foul, musty almost garlic-like odor. Chara is a gray-green branched multicellular algae that is often confused with submerged flowering plants. However, Chara has no flower, will not extend above the water surface, and often has a "grainy" or "crunchy" texture. Chara has cylindrical, whorled branches with 6 to 16 branchlets around each node.
Chara Control Options
Filamentous algae can be raked or seined from the pond.
Fertilization to produce a phytoplankton or algal "bloom" can prevent the establishment offilamentous algae if started early enough in the spring. Fertilization also produces a strong food chain to the pond fish.
Non-toxic dyes or colorants prevent or reduce aquatic plant growth by limiting sunlight penetration, similar to fertilization. However, dyes do not enhance the natural food chain and may suppress the natural food chain of the pond.
Grass carp will seldom control aquatic vegetation the first year they are stocked. They will readily consume chara. Grass carp stocking rates to control chara are usually in the range of 7 to 15 per surface acre. In Texas, only triploid grass carp are legal and a permit from the Texas Parks and Wildlife Department is required before they can be purchased from a certified dealer
The active ingredients that have been successful in treating filamentous algae include copper based compounds (E) E = excellent, G = good
Information and photos courtesy of:
Department of Wildlife and Fisheries Sciences, Texas A&M University