A new computer program from the University of Idaho helps growers make better herbicide choices and manage weed resistance.

Weed scientists Donn Thill, Joan Campbell and Traci Rauch developed the program for dryland crops in northern Idaho, according to a news release.

Weed scientist Don Morishita at the Kimberly Research and Extension Center is working to expand the program’s use to southern Idaho irrigated crops.

“The goal is to help growers make decisions about which herbicide might best control weed problems and fit into their crop rotations,” Thill, who's based in Moscow, said in the release.

The program, “Herbicide Resistance and Persistence Management,” is available on a free trial basis to growers. If they decide to use it, they will be charged a $50 annual subscription fee to cover updates.

It is designed to help growers chose herbicides with different modes of action—a key element in herbicide resistance management.

The program also helps them keep records from year to year, so they can track herbicide use.

In addition, the program targets another challenge--deciding which herbicide best fits their crop rotations.

The program is available for purchase online at http://www.cals.uidaho.edu/herbicidemanagement.

Growers who download the program will have a six month trial period before they have to pay a subscription fee.