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SONAR A.S. 32oz Duckweed and Lake Weed Control 2 Acre Control + Free Shipping!


Warning: Some vendors advertising Sonar AS products at lower prices ship generic products instead. Be sure to check with any vendor prior to ordering that they will be shipping only genuine and authentic Sonar AS.

SONAR AS 32oz (QT) Fluridone - Powerful DuckWeed and PondWeed Control Treatment for Lakes, Ponds, Lagoons, Ornamental Ponds, Reservoirs, Potable Water Sources, Drainage Canals and Irrigation Canals.

SONAR AS herbicide contains 41.7% Fluridone - the Premier active ingredient used by professionals worldwide!

SONAR AS duckweed killer remains a premier control treatment of choice by aquatic professionals worldwide since the active ingredient in SONAR AS, Fluridone, has the power and ability to completely eliminate DuckWeed,WaterMeal, Milfoil, Hydrilla and most other nuisance weeds.

Application is easy - Simply follow included application instructions! Once applied, SONAR AS is absorbed by shoots and roots and travels systemically in the vascular system of nuisance aquatic weeds.

SONAR AS has no swimming restriction and just 32 ounces will completely treat a 2 acre shallow pond for the entire season.

SONAR AS Duckweed and Lake Weed Control - Waiting Periods: If application rates are 150 ppb or less, treated water may be used immediately with no waiting period for drinking (potable) water (including watering livestock and pets.

SONAR AS Controls
  • common duckweed
  • spatterdock
  • bladderwort
  • paragrass
  • water-lily
  • common coontail
  • common elodea
  • egeria, Brazilian elodea
  • fanwort, cabomba
  • hydrilla
  • naiad
  • pondweed
  • watermilfoil
Partially Controls
  • common watermeal
  • alligatorweed
  • Illinois pondweed
  • barnyardgrass
  • American lotus
  • limnophila
  • giant cutgrass
  • cattail
  • tapegrass
  • reed canarygrass
  • creeping waterprimrose
  • American eelgrass
  • southern watergrass
  • parrotfeather
  • watermilfoil-variable-leaf milfoil
  • torpedograss
  • smartweed
  • spikerush
  • waterpurslane
  • watershield
Suggested Treatment Amount Per 1 Acre
Feet of Water Minimum Ounces required 45 ppb Maximum Ounces required 90 ppb (Watermeal, dense weed infestation or difficult-to-control species)
1 3.8 fl. oz 7.7 fl. oz.
2 7.7 fl. oz 15.7 fl. oz
3 11.8 fl. oz 23.4 fl. oz
4 15.7 fl. oz 31.4 fl. oz
5 19.5 fl. oz 39.0 fl. oz
6 23.4 fl. oz 46.7 fl. oz
7 27.2 fl. oz 54.4 fl. oz
8 31.4 fl. oz 62.4 fl. oz
9 35.2 fl. oz 70.1 fl. oz
10 39.0 fl. oz 78.1 fl. oz

Downloads - SONAR AS Label SONAR AS MSDS

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Read Entire Label Prior To Treatment
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  • Model: SONAR32

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