Find out for certain if your weeds are resistant to a given herbicide. The Auburn University Herbicide Resistance Diagnostic Lab offers three different diagnostic screenings: Rapid screening, Traditional bioassay screening, and DNA sequencing.

Proper diagnosis of herbicide resistance is key to weed management. Applications of herbicides to resistant populations result in unnecessary herbicide sprayed in the environment and money lost due to herbicide, equipment, and labor expenses. Also, applying herbicides to resistant weed populations further perpetuates the resistant populations by killing off susceptible plants and allow resistant plants to thrive.

The major weeds tested in the resistance lab are: Annual bluegrass, goosegrass, and annual sedges/kyllingas. Assays can be adapted to any weed species. Contact the lab for more information.