太子参病虫害防治（Prevention and control of the disease）.doc

太子参病虫害防治（Prevention and control of the disease） The prevention and control of the disease should be adhered to the principle of prevention first, comprehensive prevention and control, and the biological pesticide should be selected first, and chemical pesticide should be selected. Chemical control due to use the high efficiency, low toxicity and low residue of pesticides, should strictly control the spraying concentration, dosage of mu, application frequency, in radix pseudostellariae harvest within one month before it is forbidden to use any pesticides. Virus disease is the most important and important disease of the prince. The leaves of the injured plant are shriveled and flowered, the plants are withered and the root is thin and small. This disease is common in the region, the incidence rate is up to 70%, serious harm and influence the output and quality of the prince. Control method: the selection of disease-resistant varieties. It is best to grow with seeds, and its Mosaic disease is rare and high yield. Seeds with 0 ℃ low temperature treatment about 50 days after planting, the west can be produced without poison; In order to establish a non - viral crop field for large-scale production; In the growing season, the breeding fields should always be found at any time to remove the Mosaic strain and reduce the infection. Timely pest control, ensure that seedlings do not take poison. After discovering virus disease, can choose virus, virus A and so on cure. 2, leaf spot, Strain foliage leaf spot happens in spring and summer rainy season, often appear round or irregular shaped brown disease spot, the onset of serious when can cause blade brown dying, ginseng root decrescent, yield decreased. Methods: to remove the leaf of the disease and reduce the origin of the bacteria. (2) the early onset of polyster Ann (more oxygen toxin) 1000 times liquid spray control, middle 70% mancozeb 800 times liquid for prevention and control are available, and each time you use the app