多效唑是一种植物生长延缓剂,在果树上使用能使树体矮化、枝条缩短、通风透光,有利于成花、坐果、提高产量。可部分代替修剪,还可使叶片浓绿、枝条变粗,对抽生能力强的果树品种,其作用更为明显。如桃树营养生长旺盛,新梢生长量大,一年可形成多次副梢,如果生产中不注意控制,很易让树冠郁闭,通风透光不良,影响果实发育、着色和花芽分化。葡萄施用多效唑,可 Paclobutrazol is a plant growth retarding agent, used in fruit trees can dwarf trees, shorten the branches, ventilation and light, is conducive to flowering, fruit set, increase production. Partially instead of pruning, but also make the leaves thick green, branches thicker, strong ability to pump fruit varieties, its role is more pronounced. Such as peach tree growth, vegetative growth of new shoots, many times a year can form a pair of shoots, if not pay attention to the control of production, it is easy to make the crown closed, poor ventilation and light, affecting fruit development, coloring and flower bud differentiation. Paclobutrazol grapes can be used