Aquatic Weed Control

Killing weeds in water
Since the loss of approval of dichlobenil, aquatic weed control has become a major challenge. Glyphosate products approved for aquatic situations (such as Roundup ProActive, Roundup ProVantage & Gallup Biograde) will only work on pond weeds if the water level can be lowered to expose them - not often a very practical method.

However, if aquatic weeds are in a very dense matt and there is emerged leaf, or indeed the water level could be reduced to expose more of the plant, then Roundup ProActive / Roundup ProVantage can be extremely effective.

About aquatic weed control
Aquatic use means spraying in, on or near water, which can be open or closed (i.e. river or pond).

Using herbicides in aquatic applications
All aquatic use herbicides require Environment Agency approval; contact your local EA office before work begins. The Department of Environment, Food and Rural Affairs (DEFRA) enforces strict rules on the use of herbicides in aquatic areas. Please see The Environment Agency literature: SC120008 - Aquatic and Riparian Plant Management.

Controlling aquatic weeds / pond weed control
Roundup ProActive / Roundup ProVantage is a professional strength glyphosate which provide long term aquatic weed control. It controls both emergent and floating weeds.

Emergent weeds – bulrush, common reed, creeping bent, reed canary grass, reed sweet grass, sedges, soft rush, watercress and whorlgrass
Floating weeds – white water lily, yellow water lily.

When Roundup ProActive / Roundup ProVantage is used as directed there is little risk to spray operators, wildlife or the environment. It may be used in waters stocked with fish (if used in accordance with the recommendations shown on the product label). Use a knapsack sprayer or weedwiper to apply.

Adjuvants for aquatic weed control
Floating or emergent pond weeds will require an adjuvant with glyphosate to help it ‘stick’. TopFilm, (a natural biosponge called Biocar made from maize) may improve control of species where herbicide wash-off is a problem, e.g.: parrots feather (myriophyllum aqauticum), fringed water-lily (potamogeton natans), floating pennywort (hydrocotyle ranunculoides), water primroses, canadian waterweed (elodea canadensis), Australian swamp stonecrop, fringed water lily (nymphoides peltata).

TopFilm is an approved adjuvant for use in water.

Please see our table below for comparisons between total weedkillers:

Total WeedkillersGallup BiogradeGallup Hi-AktivRoundup ProActiveRoundup ProVantage 480
Pack size (litres) 5 L or 20 L 5 L 1 L or 5 L 5 L
Contains glyphosate? yes yes yes yes
Glyphosate concentration 360 490 360 480
Concentrate or ready to use? Conc Conc Conc Conc
Aquatic area covered (m2) 8000 11300 8000 11100
Professional use? yes yes yes yes
Full aquatic use? yes yes yes yes
Full amenity label? yes yes yes yes
Why choose me? More cost effective than Monsanto brands More cost effective than Monsanto brands Respected Monsanto brand Respected Monsanto brand

*If you wish to improve the speed and efficiency of weed kill, and improve rainfastness, we recommend the addition of the water-conditioner Attak with all glyphosate containing products (except Roundup ProActive 360 & Roundup ProVantage which already contain a water conditioner).

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