多效唑是一种较为理想的新型植物生长延缓剂,经在苹果、桃、葡萄树上应用,均有明显地抑制营养生长、促进成花、增加产量、提高果实品质的作用。但若使用不当,则会适得其反,造成不良后果,甚至会严重影响果讨生产。因此,为安全、有效起见,使用多效唑时应注意如下事项;(1)药液要随用随配.以免稀释后药液存放失效,即使短期存放,也要求低温和避光条件。(2)喷药应选无风、晴天,在上午10时以前或下午4时以后进行,不要在雨 Paclobutrazol is an ideal new plant growth retarding agent, applied to apple, peach and grapevine, which obviously inhibited vegetative growth, promoted flowering, increased yield and improved fruit quality. However, if used improperly, it would be counterproductive, resulting in adverse consequences and could even seriously affect the production of fruit. Therefore, in order to be safe and effective, the following items should be taken into consideration when using paclobutrazol: (1) The liquid should be used as soon as it is dispensed to prevent the liquid from being stored after dilution. Even under short-term storage, low temperature and dark conditions are also required. (2) spraying should be selected no wind, sunny, before 10 o’clock or after 4 o’clock, do not rain