一、用量忌过多过少。常规移栽稻田按除草剂的有效成分适量施用,即按除草剂使用说明用。若用量过少,药力不够,难以将杂草杀死;用量太大,浪费了药剂,经济上划算不来,药液浓度过高,会出现副作用,严重时会产生药害。二、时间忌过早过迟。稻田适时掌握施用除草剂将直接影响除草效果 First, the amount of avoid too much too much. Conventional transplanting paddy according to the effective amount of herbicides appropriate amount, that is, according to the instructions for the use of herbicides. If the dosage is too small, the drug is not enough, it is difficult to kill weeds; dosage is too large, waste of pharmaceuticals, economically unbearable, high concentration of liquid medicine, there will be side effects, serious injury will occur. Second, too early to avoid time. Timely control of rice fields herbicides will have a direct impact on weeding