Shallow ponds tend to be a problem will all sorts of rooted plants if the water is clear and shallow so sunlight reaches the bottom so young plants can sprout and grow. Eliminating the lilies will result in another plant taking their place unless you do something to prevent new regrowth. Best way to prevent regrowth in a shallow pond is deepening the pond or reducing ability of light reaching the bottom through fertilization or pond dyes.

IMO best chemical way to reduce or eliminate lilies including spatterdock (cow lily, Nuphar variegata) is with a glysophate based herbicide such as Rodeo + surfactant or in order of my preference Shore Klear Plus (includes surfactant), Shore Klear or Aqua Star(amine salt of glyphosate needs surfactant), Eagre, Aqua Pro (glyphosate, needs surfactnt), Navigate (2-4D granular). Read and fully understand instructions before buying and using.

You might want to consider just eliminating a portion of the total stand or crop. Once you have them killed back to a lower density or growth area then use annual or semi-annual touch ups to control new invasive growth.

Last edited by Bill Cody; 03/11/08 11:21 AM.

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