Knapsack Sprayer Assembly Guide: Simplified Steps for Success Njanja Version . Many farmers often face challenges when assembling their sprayers due to a lack of instructions. In this video, you will be provided with easy-to-follow steps to ensure a successful sprayer assembly. It's important to note that sprayers come with two nozzles: one for herbicide and another for insecticide. To maximize the effectiveness of the chemicals, make sure to use the correct nozzle for each application." #agricu