Herbicide Injury Symptoms

Many special thanks to Rick Holm for the opportunity to use the vast photo bank he developed over the course of his career as a weed scientist.

Group 1 - ACCase inhibitors

Group 2 - ALS / AHAS inhibitors

Group 3 - Mitotic inhibitors

Group 4 - Growth regulators

Group 5 - Photosynthetic inhibitors II - triazine

Group 6 - Photosynthetic inhibitors I - nitriles / benzothiadiazoles

Group 7 - Photosynthetic inhibitors II - ureas / amines

Group 8 - Unknown mode of action

Group 9 - Inhibitors of EPSP synthase

Group 10 - Inhibitors of glutamine synthetase

Group 11 - Inhibit carotenoid synthesis

Group 13 - Inhibition of carotenoid biosynthesis

Group 14 - Inhibition of PPO

Group 22 - Membrane rupture / Photosynthetic inhibitors I

Group 27 - HPPD inhibitors - isoxazole