Author(s):

K Singh, D Padhee, AK Parmar and BL Sinha

Abstract: The use of pesticides is an integrant part of the modern agriculture and contributes to productivity and quality of crop grown. For this purpose of pesticide application, a solar operated knapsack sprayer was developed to avoid problems like electricity shortage, fatigue due to continuous operating of a manual knapsack sprayer and other difficulties in engine operated sprayer. This device is developed to reduce the constant application of energy to throttle to regulate air pressure a problem in conventional knapsack sprayers. Laboratory and field tests were conducted to determine the flow rate, application rate of the sprayer and charging time of the battery used in the developed sprayer. The results showed that the sprayer has a flow rate of 2 to 3 L/min by using different nozzles, application rate of 850 l/ha to 1280 l/ha. The sprayer is capable of spraying 850 l/ha to 1280 l/ha in 7.15 hrs at a walking speed of 0.70 m/s. The 10W solar panel can produces 0.833 Amp. The charging time of the battery using solar panel has been measured by continuously charging battery and it is found that 11 hours for two day of every day 8 hours.

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