Aquatic Weed Herbicides | Aquatic Weed Harvester Australia

These are the common Herbicide Treatments that are effective in the control of Aquatic Weeds in Australia.

Apparent Affray 300

Affray 300 is a selective, systemic herbicide containing the active ingredient 2,4-D. It mimics natural plant hormones, causing broadleaf weeds to grow uncontrollably until they exhaust their energy reserves and die off. It is primarily used to control woody and broadleaf weeds in non-crop areas, pastures, and aquatic environments.

AQ200

AQ200 is a fast-acting, broad-spectrum aquatic herbicide used to control submerged, floating, and emergent weeds in artificial water bodies such as dams and ponds. It acts as a contact herbicide, which means it destroys the plant cells upon contact rather than absorbing into the root.

Clipper® Herbicide

Clipper Herbicide is a fast-acting, selective contact aquatic herbicide that is used to control invasive and noxious weeds and algae in ponds, lakes, dams and other fresh water bodies. The herbicides active ingredient is flumioxazin, which works by inhibiting chlorophyll synthesis and destroying plant cells on contact.

Metsulfuron

A selective herbicide widely used for controlling Alligator Weed (noxious). Although it is somewhat effective against Alligator Weed, Metsulfuron is like other chemicals controlling this weed, slow to reach the underwater root system, then the weed re-grows. The recommended treatment for this weed is continuing spray application treatments 3 times yearly for several years until eradication becomes evident.

Weedmaster Duo

Weedmaster Duo is a powerful weed killer that is used to kill annual, perennial, and woody weeds. It contains glyphosate which is a non-selective herbicide, meaning it kills almost any plant it comes in contact with. Weedmaster Duo uses a special mix of two different salts. This mix helps the weed killer soak into plant leaves much faster than older formulas. Once inside, it moves down to the roots and stops the plant from growing, eventually killing it entirely.

Application Issues

Some Alligator Weed herbicide applications are sprayed and left to sink to the bottom of the waterway and rot instead of removing the dead weed from the water. Even allowing the sprayed material to rot in the water can cause dissolved oxygen depletion which can kill aquatic life.

Spray drift is another critical issue and must be well controlled so as to not impact on untargeted flora and fauna. When spraying in waterways that are used for irrigation and potable use, most labels will restrict spraying within .5 km from any water withdrawal point. Alligator Weed also grows well on land particularly in riparian areas and herbicide mix rates need to be strictly adhered to when treating these areas in case a rise in water level covers the sprayed area and contaminates the waterway.