A 2-stroke knapsack sprayer is a backpack-mounted, petrol-powered spraying machine used for applying pesticides, herbicides, fungicides, foliar fertilizers, and disinfectants. It is equipped with a 2-stroke engine that provides high spraying pressure and longer spraying distance, making it suitable for farms, orchards, gardens, and livestock areas. The sprayer improves efficiency, reduces manual effort, and enables quick and uniform chemical application over large areas.