It can be spot treated with granular or a liquid dispersed with a drop tube below the surface. IMO the granular such as aquathol super K provides good and effective control for relatively small spot treatments providing the "spots" are not real large. Large infested areas are likely most effectively treated by whole pond chemical treatments.

It is a little late in the season for getting good control of curly leaf. It is best treated before it reaches the surface and before it forms the turions. Treatment can be as soon as the water reaches 50-55F. It can be treated in late fall when the turions have sprouted and before the water drops to 48F.

Last edited by Bill Cody; 05/29/16 07:09 PM.

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