Pests

Calibration of Pesticide Application Equipment

The importance in accurate application of pesticides cannot be stressed enough for the well being of our environment. 

Calibration of your equipment will provide:

  • a cost effective pesticide application

  • the precise amount of chemical  for your given area and/or target
  • minimal impact on the surrounding environment.

To calibrate your spray equipment: 

Knapsack: 

Step 1  

Simply, add 5 litres / 1 gallon of water to your sprayer. Then, pressurise your sprayer, keeping the pressure constant. Aim the nozzle in to a beaker or bucket and apply for 30 seconds. Measure the amount of water pumped out of your spray and repeat this 3 times and get the average. 

Example 0.35litres of water in 30 seconds

Step 2 

Then measure the length it takes you to walk in 30 seconds, again repeat this 3 times and get the average. 

Example 10m

Step 3  

Then measure the width of your spray pattern. With this measurement and the measurement of the average distanced walked you can multiply the 2 figures to obtain the square metres / yards of your spray pattern. 

Example 0.30m

Step 4 

Through this process you can gain the output of your sprayer over any particular area. 

For example: Your average distanced walked over 30 seconds is 10m and the width of your spray pattern is 0.3m, then simply 10m x 0.3 = 3m2

Step 5 

Then multiply the area by the output of your sprayer.  

For example 0.35lt divide 3m2 = 0.116lts.  

Therefore you are using 0.116 litres of water per 1 metre square.  

If you where to spray an area, for example 100m2,  then you would multiply your figure which in this example is 0.116lts  x 100m2 = 11.6 litres of water.

Step 6  

If your rate of chemical is 10ml / 1 litre of water

11.6 lts x 0.01 = 0 .116 litres     

Therefore 116mls  of chemical would be required to cover 100m2 through this particular nozzle setting & sprayer.

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*Gardenet takes no responsibility for the action and remedies provided. Whilst all information given is known to be true and correct, the decision of the recipient to use the information is at their own discretion. The information provided is general in nature and persons should seek on-site independent professional advice.