Skip to content

Shoreline Defense Aquatic Herbicide


  • Kills the roots of even the most persistent weeds
  • Works best on cattails, lilies, loosestrife and other emergent weeds
  • Great for beaches and shorelines
  • Cannot be shipped to AK, AZ, CA, CT, DC, HI, ME, NJ, NY, PR, RI, VT, WA or Canada

Kill the roots of even the most persistent emergent aquatic weeds & grasses with Airmax Shoreline Defense. This systemic, non-selective herbicide is great for controlling cattails or any other plant growing above or out of the water.

Apply Shoreline Defense directly to the foliage, allowing it to be absorbed by the weed and kill the roots for long term control. Shoreline Defense is not to be used for submerged weeds.

This pond and lake weed control product works great for beaches, shorelines or anywhere emergent weeds grow. Use with Treatment Booster Plus for best results.

Weeds Treated

Shoreline Defense treats emergent weeds. Emergent weeds are unwanted plants that may have submerged roots, but the majority of the plant is above the water. Common emergent weeds include

  • Cattails
  • Alligator Weed
  • Purple Loosestrife
  • Shoreline Grasses
  • Creeping Water Primrose
  • Smartweed
  • Phragmites

For submerged or floating weeds, try PondWeed Defense or WipeOut.

Water Use Restrictions


How to Apply

  1. Always follow all instructions on the Product Label and wear appropriate protective gear. Apply the product on a calm day during the weeds’ growing season.
  2. Mix Shoreline Defense and water in a tank sprayer according to the label instructions.
  3. Add Treatment Booster Plus (if using) at a rate of 2 fluid ounces per gallon of treatment solution. Treatment Booster Plus enhances the effectiveness of Shoreline Defense by helping the product penetrate the waxy cuticle of emergent weeds.
  4. Thoroughly mix the solution.
  5. Adjust the pressure of your tank sprayer as needed. To minimize bounce-back, do not over-pressurize the sprayer.
  6. Spray the treatment directly on to foliage that is above the water, making sure to thoroughly wet the plant. The treatment will penetrate the leaves and eventually be carried down into the roots. To avoid fish suffocation, treat no more than half of the pond in a single application. (On hot days or in ponds with heavy growth, treat no more than 1/4 of the pond.) Many pond owners choose to leave some areas of their pond untreated to provide habitat for wildlife.
  7. Most weeds die within 7 to 10 days of application. A second application may be needed in some situations.
  8. Once the plant is completely dead, use a rake to remove the dead foliage from the water. Failure to remove dead plant material could contribute to future weed and algae growth and add to pond muck.

View Product Label

Weight N/A
Dimensions N/A

1 Quart, 1 Gallon

You may also like…