１、用量忌多或少。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。用量超过太大,浪费了药剂经济上划不来,还因药液浓度高,会出现副作用,严重时会产生药害;２、用时忌早或迟。适时掌握施用除草剂将直接影响除草效果。宜 1, avoid more or less dosage. 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 amount is too small, the drug is not enough, it is difficult to kill weeds. Excessive dosage is too large, a waste of pharmaceutical economy can not draw, but also because of the high concentration of liquid medicine, there will be side effects, serious will have injury; 2, when used avoid early or late. Timely grasp the application of herbicides will directly affect the weeding effect. should