FIGURE 5 The effectiveness of imazapyr herbicide on S. alterni fl ora . (A) The changes of S. alterni fl ora in one treated plot (plot 2 in b) from day 0 to day 300 after treatment. (B) The overview of treatment effectiveness, photos were taken after treatment for 14 months, a typhoon had cleared away the dead vegetation. Red letters and plots show high concentrations plots, green letters and plots show low concentrations, and blue plots show the untreated