Weedtrine-D is a broad spectrum liquid aquatic herbicide for use in and around still lakes, ponds, ditches, non-crop or non-planted areas. It contains 8.53% active diquat dibromide . Weedtrine-D acts as a contact killer in plants by disrupting cellular membranes. Loss of these membranes allows the active ingredient to move into the plant and ‘short circuit’ photosynthesis. This item is restricted from sale in CT, DC, MA, ME, MI, NJ, NY and VT. This product cannot ship to these states.