Chemicals are used in the vegetable industry to control pests, diseases and weeds. The majority of agricultural chemicals are applied in the form of droplets produced from different types of nozzles mounted on spray booms. To maximise spray efficiency, droplets must be uniformly distributed on the target surface with minimum loss (usually caused by drift, evaporation and run-off). Poor spray application techniques waste chemicals, reduce control of pests and result in loss of yield and quality. This ultimately leads to lower returns for the grower. This fact sheet provides insightful information about different modes of spray application that will lift the returns of the grower and avoid chemical wastage.