Blackhead

Maois a perennian herb. Block root for medicinal use, flowers for viewing. It is widely distributed in China and is also found in northern Vietnam. According to Chinese, China's Spring and Autumn Period has used Wutou as a poison. Cultivated in the 11th century in the Changming area of Sichuan Province. Song Susong's "The Book of Herbs" and Yang Tianhui's "Changming's Appendix" are both described. Now Sichuan Jiang oil, An County area is still the main production area, Hubei, Shaanxi and other provinces also have cultivation.

roots of the black head are inverted conical shape, often one to several congeners of the same shape, the cultivated side roots are very large. Stem height 60 to 150 cm, above the middle of the short soft hair is anti-curved. Leaves are mutual, pentagonal, 3 deep cracks, side cracks and 2 cracks. The total flower sequence tops, the flower sequence axis is also anti-curved and close to the short soft hair, summer and autumn flowering, sliver 5 pieces are petal-shaped, blue-purple, above 1 piece of high helmet, petals 2, have long claws. Aggregate bone □ 3 to 5 fruits. Seeds for the most part. Warm, humid climate and plenty of sunshine. Suitable for fertile and loose sandy loam, it is best to choose irrigation and well-drained flat dam planting. Don't make it. Mainly with root breeding. Sichuan Province's main production areas with block roots are mostly from An County, Pingwu, Qingchuan and other counties in the high-cold mountains, mostly wild or semi-wild, drug farmers called "U medicine." After cultivation, the "u-drug" was dug up for larger ones and planted in mid-December, with seedlings released around mid-February of the following year. In early April and mid-May each carried out 1 root repair, each plant only left 1 to 2 well-growing side roots, and timely top removal, bud removal. Harvest in July. The main root (mother root) into the drug called "Chuan Wu" or "Utou", side root (sub-root) into the drug called "appendix". Pests and diseases have white disease, leaf spot disease, root-knotted worms, molyphids and so on.Wutou block root contains Wutou alkali, sub-Utou alkali, xin Wutou alkali, Taradisamin, Sichuan Wutou alkali A, Sichuan Wutou alkali B, stick palm alkali, go-a-pigs hairy vegetable alkali and other ingredients. Among them, ootou base, sub-utou alkali, neo-utou alkali is highly toxic double-lipid alkaloid, so wutou, appendix for medicinal use must be concoctioned, reduce the total alkaloid and double-lipid alkaloid content, reduce toxicity. Chinese medicine Sichuan Wu can rheumatism, cold, pain relief. The main treatment of wind chill and wet paralysis, half of the body is not completed, heart cold pain. In addition to the same function as Sichuan Wu, the appendix can also return to the sun to make up the fire, cure the dead yang, cold limb cold, kidney edema and spleen and stomach cold, abdominal pain, vomiting and diarrhea and other diseases. Use must be long frying, pregnant women do not take. After processing, cooked tablets of frying agent, have analgesic and anti-inflammatory effects, on the pituitary-adrenal cortical system has an excitable effect on coronary blood vessels, and has a strong heart effect. Raw ootou root powder preparation can be used for mucous membrane surface anesthesia.