Buffer Zone Calculator

The Buffer Zone Calculator is an interactive tool that enables pesticide applicators to modify the size of the Buffer Zone (BZ) specified on a pesticide product label when spraying their fields. By combining information on current weather conditions and their sprayer configuration, applicators may find that BZ distances on product labels can be reduced.

Applicators can use the Calculator for all airblast applications, and for field and aerial applications which specify the following droplet size category wording on the product label: "DO NOT apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) [Fine or Medium or Coarse] classification." The Calculator is not applicable to ASAE Very Fine or Very Coarse spray droplets.

Applicators that choose to use the Calculator to reduce their BZ will need to retain a copy of the BZ Summary page to demonstrate compliance with label directions. Records must be retained for at least one year following application.

Please have the following ready before using the Calculator:

• Product Label
• Windspeed
• Wind Direction
• Sprayer configuration
• Temperature (for aerial applications only)
• Relative Humidity (for aerial applications only)

Information entered into the calculator is not stored or saved.
If you leave the calculator application to gather needed information, when you return, you will have to re-enter the data.

Please use the "Previous" and "Next" buttons when using the Calculator.
If you use the forward and back buttons on your Internet browser,
information entered may be lost.

If you have any questions or would like to provide feedback to improve the BZ Calculator, please contact the Pest Management Information Service.

Additional Resources

• Glossary of Terms - Calculator