Prevent and control technologies for Polygonim sibircum

The medical, biological, agricultural measures were applied to prevent and control Polygonim sibircum. The result of this study showed that three measures led death rate of P.sibircum to gradual increase in the 45 days, and then P.sibircum regenerated gradually in the 30 days. Medical measure, overdrilling measure and heavy grazing showed a better control and prevent for P.sibircum, in which the herbicide glyphosate was the best measure to control P.sibircum and the heavy grazing followed it, and other measures did not work. This study indicated that any measures did not control P.sibircum once time, and had to be applied many times. Combing medical measure and biological measure and rational management, harmfulness of P.sibircum could be reduced.