They persist in the soil for 140 to 180 and 30 to 60 days, respectively. Water and soil pH have little effect on persistence. Solution pH controls the extent to which the herbicide enters the plant via the cuticle. These herbicides persist longer in cool, dry conditions than in warm, moist conditions. Plant injury symptoms.
Affected plants show rapid epinasty, uncontrolled plant growth, and slow die-back.
Tordon and Stinger possess foliar and some soil activity. Colorado Weed Management Guide , from Colorado State University Cooperative Extension and Agricultural Experiment Station. How Surfactants Work. Classification scheme for organic herbicide families. Go to top of this page.