Plant growth regulators are a kind of pesticides used to regulate plant growth and development, including synthetic compounds and natural plant hormones extracted from organisms.

Common plant growth regulators are available aminoethyl ester (DA-6), clofenurea, sodium nitrophenolate, brassinolide and gibberellin.

Plant growth regulators are the products of organic synthesis, microanalysis, plant physiology and biochemistry and the comprehensive development of modern agriculture, forestry and horticultural cultivation.

In the 1920s and 1930s, it was found that there were trace natural plant hormones such as ethylene, 3- indoleacetic acid and gibberellin in plants, which could control the growth and development. In the 1940s, research on the synthesis of analogues, 2,4-D, DA-6, clopidogrel, sodium nitrophenolate,&; -NAA, Ya Dan, etc. , gradually popularized and used, forming a category of pesticides.