Poor or inadequate spray nozzles can have significant impact on the application of plant protection products. A Users Guide to Spray Nozzles offers 54 pgs. of unbiased information to evaluate performance claims from nozzle manufacturers, including: cost consequences and potential yield loss of over/under application of chemicals; technical aspects of spray nozzles; selecting the best nozzle based on user requirements; resources for technical assistance; and recommended nozzle maintenance and sprayer calibration procedures. Features illustrations, diagrams, and reference tables such as theoretical coverage, minimum suggested spray heights, density conversions, speeds, nozzle output, and more. Addresses topics such as drift control, drift study methodology, and droplet size.