Mint is the dried aerial part of the mint (Mentha Hoplocalyx), also known as S. mint. With scattered wind heat, clear head, rashes and other functions. The main production of Jiangsu, Jiangxi, Anhui, Hebei, Sichuan and other provinces. It is cultivated throughout the country. (A) Morphological characteristics perennial herb, plant height 30 cm to 80 cm, the whole plant has a cool aroma. Rhizome pods, white. Stems or erect stems above ground, green or purple, square, hollow, with retrorse puberulent and glandular spots. Leaves opposite, ovate or oblong, margin serrulate, both surfaces puberulent and yellow glandular, round umbel axillary; calyx bell-shaped, outside white pubescent and glandular, 10-veined, 5-toothed Corolla pinkish red, 2-lipped; stamens 4; ovary 4-lobed. Nutlets 4, ovoid. Flowering from August to October, fruiting period from September to November. (ii) Growth habits Mint is a shallow-rooted plant, and most of the rootstocks are concentrated in a range of about 15 centimeters on the surface of the soil, and are distributed horizontally about 30 centimeters. Both rhizomes and stems have a strong germination ability and are used as vegetative propagation materials in production. Peppermint is adaptable to environmental conditions and can grow in areas up to 2100 meters above sea level. However, in the sunny, warm and humid environment, the roots and shoots germinate at 5°C to 6°C, the suitable temperature for plant growth is 20°C to 30°C, and the underground rhizomes can still survive safely at -20°C to 30°C. (III) Cultivation Techniques 1. Due to long-term breeding and cultivation, varieties have formed many cultivars such as purple stem purple veins, green stem round leaves, 68-7, Haixiang No. 1, and borneol. At present, the main cultivars in Jiangsu and Zhejiang are the green stem and purple stem veins. The new varieties of Haixiang No. 1, 73-8. In recent years, it has been widely promoted in production areas. 2. Land selection and soil preparation are suitable for the cultivation of sandy loam which is flat, fertile, and convenient for drainage and irrigation. Avoid continuous works. For every 1,000 square meters, 6 000 kilograms of farmyard manure is applied. With 80 kg compound fertilizer as base fertilizer. Plowing, slicing, and smoothing, make a rake that is 1 meter to 1.2 meters wide. 3. The breeding method mainly reproduces with roots in production, and can also use cutting propagation and seed propagation. The rhizomes of mint do not have a dormancy period, and they can be sown all year round as long as the conditions are appropriate, but they are usually conducted from late October to early August. After excavating the underground rhizomes, select the roots that are short, white, stout, and free from pests and diseases. Then, on the entire surface of the rake, the groove is laid at a distance of 25 cm, and the depth is 6 cm to 10 cm. The root can be placed in the ditch. The whole piece can be discharged, or it can be cut into small pieces of 6 cm to 10 cm long. . Density should be connected end to end with rhizomes. After sowing, the soil is covered and the soil is compacted. Each 1000 m2 of rootstock is used for 100 kg to 150 kg. 4. After the emergence of field management, keep the fields moist and weed-free. About 15 cm high and after each harvest, should be promptly topdressing, top-dressing 25 kg of urea every 1000 square meters and supplemented with a small amount of phosphorus, potassium, or 5000 kg of human and animal manure. After pouring water. 5. Pest control (1) Rust: Multiple occurrences in May and rainy seasons, damage to the leaves, see Bupleurum for control methods. (2) White Spot: Occurs from May to October and damages the leaves. In the early stage of the disease, 50% carbendazim was sprayed at 1000 times, or alternately sprayed with 1:1:120 Bordeaux mixture. Insect pests mainly include small ground tigers and silver-winged moths. (D) Harvesting and Processing Mint can be harvested twice a year in Jiangsu and Zhejiang provinces, and in northern China in 1 or 2 times. The first is generally at the early flowering stage in July and the second is at the flowering stage in October. Select before and after noon on sunny days, cut the plant with a trowel, spread the sun for 2 days, pay attention to turn the sun, 7 to 8 into a dry, tie into a small handle, and then dry to dry. If the spearmint stems and leaves are sunned to a half dry, they are distilled in a distillation pot in batches to obtain peppermint oil. (5) The seed-retaining technique Mint is liable to be degraded, and the seed-retaining and seed-selection work should be done well. Common methods are as follows: For seedlings with only a small amount of contaminated and degraded plots, when the seedlings were 15 cm in height in late April, or 15 cm in the second half of August, weeds were combined to remove wild species or other hybrids in two separate lines. Pull out bad seedlings and diseased seedlings to leave farming fields. 2. Rejuvenation and reseeding is suitable for the heavily degraded plots. In late April, the plants that are robust but not degraded are selected in the field and are planted at a spacing of 1520 cm. They are transplanted and left in the fields for further management and planting.