There is provided a powder composition comprising a collection of particles (I) having median particle diameter of 10 micrometers to 200 micrometers, wherein each of said particles (I) comprises(a) a covering of a fatty compound having melting point of 50℃ to 110℃ and(b) one or more inner particles (II) comprising one or more complex that contains a cyclopropene compound molecule or a portion of a cyclopropene compound molecule encapsulated in a molecule of a molecular encapsulating agent.Also provided is a slurry comprising water and such a powder. Also provided is a method of contacting plants or plant parts with such a slurry.本發明提供一種粉末組成物，其包含具有10微米至200微米之中值粒徑之粒子(I)之集合物，其中此等粒子(I)之各個包含：(a) 包覆層，其係由具有50℃至110℃之熔點之脂肪化合物構成；(b) 一個或多個內部粒子(II)，該內部粒子(II)包含一種或多種複合物，該複合物含有被包封在分子包封劑之分子中之環丙烯化合物分子或環丙烯化合物分子之一部分。又，提供一種包含水及此種粉末之漿液。亦提供一種使植物或植物部分與此種漿液接觸之方法。
