The University of Missouri Herbicide Injury ID app assists users in diagnosing herbicide injury. Search by visible plant symptoms, herbicide trade names, active ingredients, or herbicide site-of-action numbers. Users also have the option to send photos to an expert.

DIAGNOSE PLANT SYMPTOMS: Key out the type of herbicide injury by answering a series of questions pertaining to the symptoms. On the results page, the user will find photographs and descriptions of injury, which are organized by herbicide sites-of-action.

SEARCH BY HERBICIDE: Enter the trade name or active ingredient of the herbicide-of-interest or scroll through a list of herbicides. On the results page, the user will find photographs and descriptions of injury, which are organized by herbicide sites of action.

VIEW SITES-OF-ACTION: Find the list of herbicide sites-of-action commonly used in agriculture. The list is arranged by group numbers, which are found on the front of many herbicide labels.

EMAIL AN EXPERT: Send photographs and detailed description of the observed herbicide injury to University of Missouri Weed Science Extension.