Herbicide Symptomology

The herbicide symptomology page contains 1000+ Images and includes a range of plant types, herbicide families, and stages of development of the symptomology. The images are primarily from the herbicide symptomology workshop that has been held on the Arkansas State University campus since 1997.

Images of an untreated control are also included for some of the plant types.

These images are not copyrighted and as such can be used freely for educational or informational purposes.

Partial funding for this project is through the U.S. Environmental Protection Agency, Region VI and the Arkansas State Plant Board. Support has also been received from the Arkansas Crop Protection Association and various private companies.

Image Downloads

Categories
Conservation Plant Images Conservation Plant (33) – Big Bluestem, Switchgrass, Indiangrass, Illinois Bundleflower, Partridge Pea.
ACCase (acetyl-CoA carboxylase) Inhibitor (1)
ALS (acetolactate synthase) Inhibitor (2)
Bleaching: Inhibitor of Carotenoid Biosynthesis (2)
Growth regulator (synthetic auxin) (8)
Inhibition of EPSP (5-enolpyruvylshikimate03-phosphate) synthase (9)
Cell membrane misruptor (Photosystem –I-electron diversion) (5)
Untreated check (6)
Crop Images Commercial Crops – alfalfa, corn, cotton, soybean, sorghum, rice, wheat, sunflower peanut (379)
ACCase (acetyl-CoA carboxylase) Inhibitor (21)
ALS (acetolactate synthase) Inhibitor (83)
Bleaching: Inhibitor of Carotenoid Biosynthesis (16)
Growth regulator (synthetic auxin) (110)
Inhibition of EPSP (5-enolpyruvylshikimate03-phosphate) synthase (22)
Inhibition of glutamine synthetase (11)
Inhibition of PPO (protoporphyrinogen oxidase) (35)
Cell membrane misruptor (Photosystem –I-electron diversion) (8)
Photosynthesis inhibitor (42)
Inhibition of lipid synthesis (not ACCase) (4)
Untreated check (17)
Unknown (10)
Garden Images Garden Crops – broccoli, cucurbits, peppers, tomatoes, potatoes, sweet potatoes, sweet corn, okra, eggplant, green beans (265)
ALS (acetolactate synthase) Inhibitor (37)
Bleaching: Inhibitor of Carotenoid Biosynthesis (11)
Growth regulator (synthetic auxin) (91)
Inhibition of EPSP (5-enolpyruvylshikimate03-phosphate) synthase (49)
Inhibition of PPO (protoporphyrinogen oxidase) (6)
Cell membrane misruptor (Photosystem –I-electron diversion) (23)
Photosynthesis inhibitor (28)
Untreated check (20)
Yard Images Yard Plants – Bermudagrass, Zoysia, marigold, zinnia, salvia, cannas, petunia, geranium, coleus (119)
ACCase (acetyl-CoA carboxylase) Inhibitor (2)
ALS (acetolactate synthase) Inhibitor (54)
Bleaching: Inhibitor of Carotenoid Biosynthesis (4)
Growth regulator (synthetic auxin) (21)
Inhibition of EPSP (5-enolpyruvylshikimate03-phosphate) synthase (9)
Cell membrane misruptor (Photosystem –I-electron diversion) (9)
Photosynthesis inhibitor (9)
Untreated check (6)
Unknown (5)
Weed Images Weeds (128)
ACCase (acetyl-CoA carboxylase) Inhibitor (4)
ALS (acetolactate synthase) Inhibitor (22)
Bleaching: Inhibitor of Carotenoid Biosynthesis (18)
Growth regulator (synthetic auxin) (37)
Inhibition of EPSP (5-enolpyruvylshikimate03-phosphate) synthase (12)
Inhibition of glutamine synthetase (7)
Inhibition of PPO (protoporphyrinogen oxidase) (3)
Cell membrane misruptor (Photosystem –I-electron diversion) (6)
Photosynthesis inhibitor (12)
Untreated check (5)
Unknown (2)
Tree Images Trees & other Perennials (135)
ACCase (acetyl-CoA carboxylase) Inhibitor (3)
ALS (acetolactate synthase) Inhibitor (19)
Bleaching: Inhibitor of Carotenoid Biosynthesis (17)
Growth regulator (synthetic auxin) (36)
Inhibition of EPSP (5-enolpyruvylshikimate03-phosphate) synthase (30)
Inhibition of PPO (protoporphyrinogen oxidase) (5)
Cell membrane misruptor (Photosystem –I-electron diversion) (10)
Photosynthesis inhibitor (12)
Untreated check (3)
Non-Herbicidal Images Non-herbicidal Damage (59)
Plant Disease & Pests (18)
Environmental (17)
Plant Nutrition (10)
Soil Related (8)
Other (6)