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A crop duster flies over a green crop and mists it with pesticide.

Crop dusters are small airplanes that are used to apply pesticides to crops or large areas. Only a small amount of pesticide is mixed with water to dilute it and then the mixture is spread evenly over the field. On a field the size of a football field, about 22-44 litres of water is sprayed and the amount of pesticide used is around 500 millilitres, which is the size of a small pop bottle!