乙烯利(2—氯乙基瞵酸)是一种化学合成的植物生长调节剂。它能调节植物的生理生化代谢过程、加速器官衰老、脱落和促使棉花提早开铃吐絮。但是,施用乙烯利催熟棉花,如果施用不当,也会引起幼铃脱落或使铃期不足的棉铃经济性状变劣,造成不应有的损失。根据两年来的实践,棉花施用乙烯利的技术可以概括为“三看三定”,即看棉花长势,定施用对象田;看棉花铃期和下茬作物时间安排,定施 Ethephon (2-chloroethyl gallate) is a chemically synthesized plant growth regulator. It can regulate the physiological and biochemical metabolic processes of plants, accelerate organ aging, shedding and promote cotton boll opening. However, ethephon-ripening cotton, if not properly applied, can also cause the emergence of young bellows or lower the boll economy of economic deficit, resulting in undue losses. According to two years of practice, the application of ethephon cotton can be summarized as “three to see the three set,” that is, to see the cotton growth, the target application field; cotton boll timing and the next crop scheduling, facilities