Herbicide technique: selective herbicide. Proper use of wholesale Fluroxypyr crop ground, can be reached only kill the weeds without harming the crop purposes. Herbicide. Such herbicides kill all plants have a role. Such herbicide limited recreational fields, idle land of herbicides. Herbicide technique: the strict control the amount and concentration of the herbicide. Selective herbicides are selective dosage within a certain range, and therefore even if there is a selective herbicide, an amount beyond the specified range will produce phytotoxicity to crops. Whether the appropriate amount of herbicide also affected by crop type, soil texture, weather conditions and application methods and other factors.