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Knapsack Sprayers with blower gun are conventional and most popular equipments used worldwide. They are ideal to spray insecticides, pesticides, fungicides, herbicides etc. in field areas to protect the crop from pest attack. The most important goal in the application of agricultural pesticides is to get uniform distribution of the chemicals throughout the crop foliage. Under dosing may not give the desired coverage and control needed. Overdosing is expensive as it wastes pesticide and increases the potential for groundwater contamination