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在澳大利亚于秋季对2年生元帅苹果幼龄旺树,喷用 PP333和乙烯利。喷用 PP333的时期是1989年2月中、3月中和4月中,使用浓度为0、50、100及200ppm.另外一些树于8月中喷布200ppm 的乙烯利,同时混加0、50、100及200ppm 的 PP333.1989年春季开花时观察,秋季使用植物生长调节剂的处理树未能显示稳定的效果.然而,植物生长调节剂却影响了这些树的座果。尽管 PP333的各种浓度及各种处理时期之间均无显著差异,但所有处理树的产量都高于对照树.乙烯利与 PP333混合使用时的效果与单用 PP333的相似。唯100ppm 的 PP333混加乙烯利时座果率最高.单用乙烯利时,其促进座果的作用不如与 PP333混用好.
In Australia in autumn 2 years Marshal apples young Mongolian trees spray PP333 and ethephon. PP333 was sprayed in mid-February, mid-March and mid-April 1989 at concentrations of 0, 50, 100 and 200 ppm. Other trees were sprayed with 200 ppm ethephon in mid-August, PP333 at 50, 100 and 200 ppm was observed during the spring of 1989. The treatment plants using the plant growth regulator in the fall failed to show a stabilizing effect, however, the plant growth regulators affected the fruit of these trees. Although there was no significant difference between the various concentrations of PP333 and the various treatment periods, the yield of all treated trees was higher than that of the control tree. The effect of the combination of ethephon and PP333 was similar to that of PP333 alone. The only 100ppm PP333 mixed with ethephon when the highest fruit rate.With ethephon alone, the role of promoting the fruit as a good mix with PP333 good.