Herbicide operating techniques: spraying of herbicides on weed stems and leaves of the method. This approach Beijing Jade ethyl, herbicides are not only exposed to the weed, it may come into contact with crops Jiangsu Yu-ethyl, and called for the herbicide has a high selectivity or directed spray, in order to achieve the purpose of the security administration. After the soil treatment before sowing seedlings Zhejiang jade ethyl, a method has not been before sowing crops after emergence herbicide sprayed on the soil surface. Herbicide operating techniques: foliar herbicide soon after generally fall into the soil namely passive or microbial decomposition lose herbicidal activity, while soil-applied herbicides generally ineffective after emergence of weeds. Therefore, the only choice to use when used in accordance with herbicide characteristics, in order to achieve its full effect, to avoid negative effects.