目前,我市广泛应用于麦田的化学除草剂有百草敌和二甲四氯。二者化学性质基本相似,属选择性除草剂,具有内吸传导作用。其杀草机理是利用阔叶类杂草和小麦对百草敌和二甲四氯代谢分解能力不同,通过障碍阔叶类杂草激素的正常活动而破坏其生理功能,导致死亡。具体喷洒时,二者往往 At present, our city is widely used in the field of chemical herbicides with paraquat and MCPA. The two chemical properties are similar, is a selective herbicide, with internal absorption conduction. The mechanism of its killing is the use of broad-leaved weeds and wheat on the paraquat ene and MCPA decomposition of different capacities, through the disturbance of broad-leaved weed hormones normal activity and destroy their physiological function, leading to death. Specific spraying, both often