How much vegetation control is enough?
Although it is desirable to achieve as high a percent kill as possible it is not necessary to achieve 100% kill. Most sites will include areas of excessive slope, rockiness, wetness, or other obstacles that prevents machinery from traversing the site at recommended intervals. Even sites that have been completely sprayed may have logging slash, windthrown trees, or other barriers that shelter small areas from herbicide during the spray application. After treatment, competing understory vegetation should be present on less than 15% of the total area to be considered acceptable.
