Based on your observations, discuss the different chemical families and modes of action of the herbicides that were used in the lab experiments. Include your thoughts on the symptomology and selectivity of each herbicide, the timing of application, other effects on the herbicide efficacy, and make conclusions on herbicide use in hypothetical cropping situations. All herbicides should be evaluated during the rating times. The door to the greenhouse is normally open. Southern Weed Science Society.
Weeds light green in color.
Crop may have slight discoloration. 20 No weed control. May have slight foliar symptoms. Some crop discoloration, little foliar burn. 30 Poor weed control, definite symptoms of herbicide injury.