A fumigator or sprayer is an agricultural machine in charge of fumigating areas of land to protect a crop or land from agents harmful to it.[1]​ The task of fumigation consists of spreading a compound that can be natural such as water or chemical such as herbicides or pesticides, expelling it mixed with air in the form of very fine droplets with a phytosanitary application.

The compound can be of various types, depending on its destination, its specific action, the form of presentation, the chemical composition or the degree of danger. The fumigation action can be done on foot (using a fumigating backpack), with a tractor or with small planes or helicopters.