Diagnosing injury to plants from herbicides can be difficult. A new guide (EB0232) from Montana State University is intended to aid in assessing and identifying potential non-target herbicide injury. Knowing when and what was applied is vital for diagnosing herbicide injury. In addition, knowing weather conditions, soil type and soil pH, and other environmental factors that affect herbicide performance can be helpful. This guide first describes background information necessary to understand herbicide injury, then symptoms of herbicide injury are explained in the context of plant type and herbicide mode of action. The 38-page guide has colored photographs of injury and is spiral bound.

Chapters in the guide include :

• Causes of non-target injury

• How to prevent herbicide injury

• How to diagnose herbicide injury

• Key to herbicide symptoms

• Herbicide symptoms by mode of action

Authors of the guide are MSU Extension agronomists, Noelle Orloff, Jane Mangold and Tim Seipel. The guide is free and available at the Chouteau County Extension Office. We are located at the green building next to the courthouse in Fort Benton.

Montana State University, U.S. Department of Agriculture and Montana Counties Cooperating. MSU Extension is an equal opportunity/affirmative action provider of educational outreach.