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Product Label SDS Sheet
Weedtrine-D is a broad-spectrum liquid aquatic herbicide
for use in and around still lakes, ponds, lagoons, ditches,
non-crop, or non-planted areas controlling a broad range of
filamentous algae and submerged and floating aquatic weeds.
Containing 8.53% active diquat dibromide, Weedtrine-D acts as a
potent contact killer in plants by disrupting cellular membranes
allowing Weedtrine-D to enter plants "short circuit" the plants
ability to convert light into energy known as "Photosynthesis".
Weedtrine-D is effective
anytime live foliage is accessible. Best results occur when applied
to reasonably developed foliage, but before growth becomes too
dense or weeds flower.
Weedtrine-D is recommended for small ponds less than 1/2 acre
with submerged weed and duckweed problems. Weedtrine-D herbicide is
quickly absorbed by plants.
To apply, determine the volume of water to be treated in
acre-feet. Dilute according to the label directions (dilution rate
varies). Spray uniformly over the water surface with a tank or
backpack sprayer. Allow material to rain down in coarse droplets
for better surface penetration.
One gallon of Weedtrine-D Liquid covers 4,000 sq. ft. of
submersed weeds or 8,000 to 10,000 sq. ft. of floating, immersed,
or terrestrial weeds. For floating, immersed, or terrestrial weeds,
use 2.0 to 6.5 oz. per gallon of water, add Cygnet
Plus Liquid and apply with a tank sprayer.
**1 acre = 43,560 sq. ft.
We recommend using Weedtrine®-D with the surfactant Cygnet Plus to
maximize its effectiveness when applied above water to emergent
species. Cygnet Plus reduces the surface tension, allowing the
Weedtrine®-D to wet the entire leaf instead of rolling off.
Absorption and herbicidal action are usually quite rapid, with
visible effects in a few days.
Begin application in spring as water temperature warms to 60º F
and above. Heavy, out of control growth may require more than one
application or physical removal to gain control. For best results,
use under conditions of minimal water flow. Apply early on the
morning of a calm, sunny day when the plants are actively involved
in photosynthesis. The biggest mistake people make is to come home
from work and treat vegetation. Contact time should be at least 3
For algae control best results are achieved when
mixing Weedtrine-D with Cutrine Plus or Captain. Dose
requirements are less for Duckweed control or shallow waters of
less than 2 Feet. For Duckweed control the label recommends adding
a non-ionic surfactant. One quart of Cygnet Plus Surfactant is typically enough
for most projects. Add Bio Boost Enzyme to the Tank Mix to increase
the effectiveness of the algae treatment. Treat heavy infestations
in sections to avoid oxygen depletion.
*All pesticides can be harmful to health and the environment
if misused. Read the label and follow directions. Consult with your
agency before applying herbicides and algaecides to public
waters. There are herbicides from other states that are either not
licensed in Wisconsin or Illinois, or are not recommended by
A WI DNR Aquatic Plant Control Permit or
DATCP Fish Farm License is required in WI in order to apply
algaecides or herbicides. In addition ponds and lakes with
overflows not contained on the property are required to obtain a WPDES
permit. Illinois Residents are required to obtian NPDES permits
through the Illinois
In order to apply chemicals in
liquid form within Wisconsin, the applicator must be licensed with
pesticide or treatments for specific algae or aquatic plants are
provided for general information purposes only - no warranties are
expressed or implied.
California - Connecticut
- Delaware - Hawaii - New Hampshire
- New Jersey - New
York - Maine -
Maryland - Massachusetts
-Oregon - Rhode
Island - Washington
Vermont (for additional information about
these restrictions please see shipping or
Aquathol K, Reward & Weedtrine D can not be shipped
without a permit on file.
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