于10月中旬用乙烯利和氨腈钙(Dormex)对8年生“Cresthaven”桃进行喷布。翌年1月测定了在-23℃田间条件下4小时后的花芽耐寒性差异。乙烯利处理花芽明显地比对照或Dormex处理花芽耐寒。花前至花期进行人工低温测定也显示出同样的差异。乙烯利处理的花芽盛花期约比对照晚7天。乙烯利处理树产量比其他处理和对照有所增加。 8-year-old “Cresthaven” peach was sprayed with ethephon and cymene chloride (Dormex) in mid-October. In January the following year, differences in flower bud cold tolerance after 4 hours at -23 ° C were measured. The ethephon treatment flower buds were significantly harder than the control or Dormex treatment flower buds. Artificial hypnosis from flowering to flowering also showed the same difference. Ethephon treatment flower buds about 7 days later than the control. Ethephon treatment tree yield increased compared with other treatments and controls.