Provided are methods of treating specific crop plants when those plants have reached specific developmental stages. Also provided is a method for improving the yield of a crop produced by a plurality of plants, which may or may not be any of the specific plants mentioned herein above, wherein said method comprises contacting said plants with at least one composition that comprises at least one cyclopropene.提供一種當特定作物植物達到特定發育期時,處理該等植物的方法。亦提供增進多種植物所產生之作物之產量之方法,該等多種植物可為或不為本文所述特定植物的任一種,其中該方法包含使該等植物與至少一種包含至少一種環丙烯化合物之組成物接觸。