The outcome of IRS is highly dependent on the quality of training given to spray operators. This training will be your responsibility.

You will get a national manual with detailed instructions on the training of spray operators.

The training should address spray techniques, environmental and human safety issues, as well as communication of key IRS messages. The spray operators should be trained to cover 19 m2 at a constant rate within one minute. This will allow the application of 40 ml of insecticide suspension per 1 m2 of sprayable surface; 1 litre of suspension covers 25 m2 when the nozzle tip is effectively kept at 45 cm distance from the spray surface.

The wall of a building can be used for practice. Mark an area 3 m high and 6.35 m long, divided into nine bands: the first band should be 75 cm wide and the remainder 70 cm wide (figure below). The spray nozzle will produce a swathe of spray 75 cm wide if kept at a distance of 45 cm from the wall.

Training board for residual spraying which can be marked with chalk on the wall of a large building.

Training board for residual spraying which can be marked with chalk on the wall of a large building. (WHO, 1997)

The spray nozzle will produce a swathe of spray 75 cm wide if kept at a distance of 45 cm from the wall (Figure below).

The spray nozzle discharge pattern.

The spray nozzle discharge pattern is 75 cm wide when the nozzle is held at 45 cm from the sprayed surface. (WHO, 1997)
Last modified: Saturday, 5 July 2014, 10:11 PM