H2OK? Think Water

H2OK? - Think Water

Knapsack do's and don'ts

The Voluntary Initiative is a programme of measures agreed by Government to minimise the environmental impact of pesticides. For more information see: www.voluntaryinitiative.org.uk.


  • Use clean water to check...
    • The sprayer for leaks
    • The lance cut off valve is working properly
    • The spray pattern is correct and nozzle flow rate is within 5% of manufacturers stated output.
  • Fill up in a designated pesticide handling area taking care to avoid splashing pesticide concentrate when filling knapsack.
  • Read the label before use and follow instructions. Use the rate table overleaf to check the required dose rate.
  • Triple rinse containers, measuring jugs and place washings in knapsack.
  • Apply the correct dose rate at all times.
  • Clean up thoroughly after spraying, triple rinse the spray tank, flush through the lance with clean water.
  • Dispose of washing onto the treated area.
  • Dispose of cleaned waste packaging by on farm incineration <note changes in regulations in 2005 may prohibit this>or use of a waste disposal contractor.
  • Use stored water or a double check valve.


  • Avoid filling over hard ground or concrete areas unless bunded.
  • Never take water directly from a water course, borehole or directly from a domestic supply.
  • Never fill near a water course.
  • Never wash splashes or spills into drains.
  • Never be tempted to overdose either when filling the tank or during application.
  • Never overspray buffer zones or water courses.
  • Avoid spray drift at all times.

Remember it only takes a tiny amount of pesticide to contaminate water. Every pesticide user, including knapsack operators, must follow best practice to protect water




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