We’re excited to announce that the Proactive Resistance Management (PRM) app is officially live as of today! This tool has been many years in the making, with countless hours dedicated to reviewing and editing Arizona’s 1080 pesticide use data to ensure accuracy and reliability.

The PRM app translates community-scale pesticide use into easy-to-read charts that show temporal refuges—the periods when whiteflies are not exposed to a given mode of action. By visualizing these refuges, growers and PCAs can diversify chemistries, preserve susceptibility, and make more confident decisions for whitefly management across all crops.

If you’d like to learn more, or to schedule a tutorial on how to use the app with your farm or PCA team, please reach out to me.

To ensure the app is being used by the IPM decision makers—you must request access to use the app.

Request access here: http://PRM.extension.arizona.edu

Figure 1. Example temporal refuge chart from the Proactive Resistance Management
(PRM) web tool for a specific date and locality in Yuma, Arizona. Each colored bar
represents the proportion of temporal refuge (0–1) for a given Mode of Action (MoA) during
successive 90-day look-back periods. Higher refuge generally indicates fewer days of
exposure of whiteflies to that MoA, and thus lower resistance risk. These results are
interpretive, not prescriptive — refuge is one factor among many (including efficacy, crop
stage, and economics) that must guide product choice.

Click here to read more about the PRM app and learn how to put it to work in your fields.



To contact Macey Keith go to: maceyw@arizona.edu