BLUE BELL by MaxGrow have 18% Bispyribac sodium.

Bispyribac sodium is a systemic herbicide that moves throughout the plant tissue and works by interfering with production of a plant enzyme necessary for growth, acetolactate synthase (ALS). The concentration in the water column must be maintained for 60-90 days. Repeat treatments can be made if necessary to “bump” up the concentration to the desired levels.

Susceptible plants will stop growing soon after treatment and become reddish at the tips of the plant. Plant death and decomposition will occur gradually over several weeks to months. Bispyribac sodium should be applied in the spring to plants that are actively growing. If applied to mature plants, the effectiveness may be reduced.

A water body should not be treated with bispyribac sodium if there is an outlet, or in moving waters such as rivers or streams. If there is water movement at a treated site, higher concentrations.

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