Weedicide composition and use method thereof

The invention relates to a weedicide composition and a use method thereof. The weedicide composition is characterized by comprising simetryne and quizalofop-p-ethyl; the mass ratio of the simetryne tothe quizalofop-p-ethyl is (1-60):(1-60); the mass percentage content of the simetryne and the quizalofop-p-ethyl in the weedicide composition is 1 to 50 percent. Compared with the weeding single agent, the weedicide composition can improve the weedicide effect, reduce the use amount and delay the weed resistance, has wide weeding spectrum and long lasting period, and has high safety in particularto the growth of muskmelons. 本发明涉及种除草剂组合物及其使用方法，本发明的除草剂组合物，其特征在于，包括西草净和精喹禾灵，所述西草净与精喹禾灵的质量比为西草净1～60：精喹禾灵1～60；所述西草净和精喹禾灵在所述除草剂组合物中的质量百分含量为1～50％。本发明的除草剂组合物相对于除草单剂不仅能够提高药效、减小用药量和延缓杂草抗性，而且除草谱广和持效期长，特别是对甜瓜的生长具有较高的安全性。