There is provided a method of treating produce comprising the step of exposing said produce to an atmosphere containing(i) 100 ppb to 5,000 ppb by volume of one or more cyclopropene compound, and(ii) ethylene, wherein the ratio of ethylene concentration by volume to cyclopropene concentration by volume is from 0.1:1 to 8:1.本發明提供一種處理農產品之方法,其包括之步驟為使該農產品曝露在包含下列者之氣體氛圍中:(i) 以體積計100 ppb至5,000 ppb之一種或多種環丙烯化合物,以及(ii)乙烯,其中乙烯體積濃度對環丙烯體積濃度之比例為0.1:1至8:1。