1. Cabbage: Chinese cabbage, Chinese cabbage, purple cabbage, red cabbage, etc.

2. Cabbage: broccoli, cauliflower, kale, broccoli, Brussels sprouts, etc.

3. Mustard: leaf mustard, stem mustard (head mustard), root mustard (kohlrabi), mustard tuber, etc.

Cruciferae plants can synthesize high concentration mustard oil. Pieris rapae is chemotactic to mustard oil, so it lays eggs on the leaves of cruciferous plants, so it is concentrated on the leaves of cruciferous plants. Dicotyledonous echinopoda 1 family. Annual, biennial or perennial herbs with alternate leaves and rosette-like basal leaves without stipules; Leaves entire or pinnately parted. The flowers are bisexual, symmetrical on both sides and arranged in racemes.

Undergraduate plants contain glucosinolates, fatty acids (oleic acid, linoleic acid, linolenic acid, etc. ), alkaloids, phenols (quercetin and kaempferol), flavonols, rutin, inositol, cardiac glycosides, saponins, bitter substances, indigo and other components, many of which have physiological activities and are widely used in the folk, such as Crotalaria and Syringa, and the seeds contain cardiac glycosides. Brassica, Cruciferae, Descurainia, etc. Many sulfur-containing glycosides in plants are hydrolyzed to form p-hydroxybenzyl hydrosulfide or allyl isothiocyanate, which is used externally to diminish inflammation and orally to stimulate expectoration.