The Free On-line Aquaculture Dictionary

Herbicides

Herbicide Chemical

Target Plants

Treatment

Comments

Ammonium sulphate

Fontinalis

225 kg / ha

Applied to the pond when dry as a preventative measure

Ammonium Nitrogen

Elodia

225kg / ha

Applied to the pond when dry as a preventative measure

Aquathol

submerged macrophytes

18.8 litres / ha

 

Calcium Cyanamide

Macrophytes

750kg / ha

Applied to filled ponds with no stock in. Pond should be fully drained and refilled prior to stocking

Copper Oxychloride

Filamentous algae (except Chara)

1 kg / ha

 

Copper Sulphate

Algae

0.5 - 1g / m3 in pH < 7.0, to 1.5g / m3 in pH > 7.0

Toxic to fish, therefore only - 1/3 pond should be treated at any one time.

Cutrine-Plus (Copper sulphate with triethanolamine)

Algae

Liquid form - 1.85 ml / m3. Granular form - 66 kg / ha. Administered 2 -3 times a year.

Dilute the liquid form to at least 10 : 1 for good coverage of th water

Dichlobenil

Submerged weeds

Depth <0.6m - 5.5 kg / ha

Depth >0.6m - 10 kg / ha

Dose rates are for the active ingredient. Formulations will contain diluted amounts. Adjust dose accordingly

Diesel fuel

Macrophytes

470 litres / ha

Sprayed onto floating weeds

Diquat

Floating or submerged macrophytes

at <0.3m depth 0.5 litres / 100m2

at >0.3m depth 1.0 litres / 100m2

Completely de-activated by mud. Ineffective in muddy  waters or areas where sediments have recently been disturbed.

Fenac (2,3,6 Trichlorophenyl acetic acid)

submerged macrophytes

22.5kg / ha

 

Glyphosate

Emergent and floating leaved plants

1.2 - 2 litres / ha

Dose rates are for the active ingredient. Formulations may contain diluted amounts. Adjust dose accordingly

Malachite Green

Filamentous algae (except Chara)

0.23g / m3

 

Quicklime

Floating algal masses

Administration as required to raise the pH of the water to 10.2

Note : Will cause damage to fish and other animal stocks

Sodium Chlorate

Macrophytes

300kg / ha

Applied to the pond when dry as a preventative measure

Superphosphate (powder)

Filamentous algae (except Chara)

600 kg / ha

 

Terbutryne (Clarosan 1% W/W)

Submerged plants and algae

Susceptible plants - 5kg / 100m3

Moderately resistant plants - 10 kg / 100m3