随着农业科学技术的发展与推广，类似生长素的药剂以其能促进植物生长、座果、插条生根、种子萌发、果实成熟及形成无籽果实等多种用途已被广大农民所接受，其中比较典型的如：用１０～２０ppm（毫升／公斤）的２，４－D（一种类似生长素药剂）涂沾番茄花瓣，可以防止落花落果? With the development and popularization of agricultural science and technology, many auxiliaries such as auxin-like agents have been accepted by many peasants for their various purposes such as promoting plant growth, rooting, cuttings rooting, seed germination, fruit ripening and the formation of seedless fruits. Some of the more typical ones include tomato petals coated with 2,4-D (an auxin-like agent) at 10 to 20 ppm (milliliter / kg) to prevent the drop of flowers and fruits.