with transverse stolons. Leaves 3-11; leaf blade ovate, slightly leathery; petiole glabrous. Scapes yellow-green, narrowly ovate, apical apex; petals nearly lanceolate, apex acuminate, Middle slightly widened, with honey groove; stamens long only about 1/2 of the petals; anthers yellow, filaments narrowly linear; style slightly curved. Oval oblong, carpels stalked puberulent. March-April flowering, April-June results. Specialty Chongqing pillars yellow water. Health elevation of 1600-2200 meters between the mountain forest, often cultivated, wild rare. Rhizome is a famous traditional Chinese medicine ("Coptis"), with berberine, Coptidis base, Coptis base, tetrandrine and other alkaloids, can cure acute conjunctivitis, acute bacillary dysentery, acute gastroenteritis, hematemesis, Embolism.
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First, to strengthen the prevention and control of pests and diseases caused by a large number of deciduous pear tree pests are Pear nets, pears, pears, etc.. (a) The prevention and treatment of pear nettles. From late May to early June, the orchards are frequently inspected and found that when there are a few pests on the leaves of a pear tree, they are sprayed once and then sprayed once a day. Commonly used drugs are 50% of the killing pine oil, kung fu, enemy killing, dimethoate and so on. (b) Prevention and treatment of pear hibiscus. Spray once before flowering and spray once after flowering. The commonly used agents are Awei insect clear, methamidophos and so on. (c) Prevention and control of pear pods. From May to June, the first occurrence of the pest occurred. Commonly used agents are Keziate, triclosan, dicofol and so on. The main diseases causing a large number of deciduous pear trees are black spot, ring spines disease, black spot disease, and rust. They should be strengthened in April and July. The commonly used pharmaceuticals include Xiansheng, Dasheng M45, polyoxin, and special bacteria. Oxime, rustin, thiophanate-methyl, carbendazim, etc. Prevention and control of pests and diseases, disinfection of clear gardens is the key. In the winter, the weeds and leaves in the garden should be promptly cleaned up and burned in a centralized manner to reduce the sources of pests and diseases. In late February, pears sprouted before spraying 5 Baume degrees of lime sulfur and 200 times of sodium pentachlorophenol, mainly spraying the trunk and trunk around the ground to minimize the source of the disease.
Second, do a good job pear orchard irrigation soil viscosity of the pear garden, pay attention to drainage in the rainy season. When water is insufficient, it should be timely irrigated to meet the water needed for normal growth of pear trees. Fruit trees should be covered with grass in order to reduce the evaporation of soil moisture.
Third, early application, deep application of basal fertilizer to increase organic fertilizer, can not only supplement the nutrient consumption of the tree, enhance tree vigor, but also increase soil fertility and water retention capacity.
Prevent the secondary flowering of pear trees in autumn
The phenomenon of pears blooming in the fall has a certain degree of universality. The flowers that should have been opened in the spring of the following year opened earlier in the fall of the year, and the amount of flowers in the following year will be reduced or even eliminated. Pear trees will have a large number of autumn shoots and consume nutrients at the same time when they open the second flower, resulting in inadequate branch and leaf tissues in jubilee and susceptible to disease. The key measure to prevent secondary flowering of pear trees is to protect the leaves. The specific method is as follows: