化学除草,是利用化学药剂消灭杂草保护作物的一种行之有效的除草方法。根据作者多年来在水旱田中大面积使用化学除草剂的经验与体会,要想保证提高化学除草剂的杀草效果,必须严格掌握以下要领:即一早、二匀、三准、四要、五个关系、六看。一早杂草长到施药适期要抓早,施药速度要快。如除草醚、五氯酚钠两种除草剂,主要防治禾本科种生杂草,但尤 Chemical weeding, is the use of chemical agents to eliminate weeds to protect crops as an effective weeding method. According to the author’s experience and experience in using chemical herbicides in a large area in water and dry land for many years, in order to ensure the herbicide-killing effect of chemical herbicides, we must strictly grasp the following essentials: early morning, even, early, late, A relationship, six see. Early weeds grow to apply the appropriate drugs to catch early, spraying speed faster. Such as weeding ether, two sodium pentachlorophenate herbicides, the main prevention and treatment of grass weeds species, but especially