Crop sprayers continue to develop and the basic principle remains. A liquid solution is delivered through a precisely shaped nozzle, at a set pressure to deliver a distribution of droplets on the target plant, weed or soil.

Modern sprayers can do this more accurately and with a greater degree of control than before. The concept of precision spraying using SMART sprayers promises even more-targeted application with the potential to reduce pesticide use and lessen resistance development while retaining efficacy.