The disease is an important worldwide disease. Its pathogen is Corynebacterium, which is parasitic in the vascular bundle of the sugarcane plant. (1) Disease and Incidence 1 Main symptoms: No typical external symptoms, development of the sugarcane plant is inhibited, perennial roots grow less, sugarcane plants dwarf, cane stems are weak, and growth is poor. The rattan cane has more incidences of newer planting cane, and the dwarfing is serious. Diseased cane is particularly sensitive to water shortage in soil. In hot weather, it is easier to show drought symptoms than healthy sugarcane plants, such as wilting, dead leaves and dead leaves. The ratoon stunt shows two types of discoloration within the stem of the cane: the head of the cane shoot, 1 cm of node tissue below the growth point becomes orange-red; the node vascular bundle of the mature cane stem changes from yellow to orange Red to reddish-brown, comma-like or short-lined. The vascular color of the nodules will never extend into the interludes. 2 the incidence of law: dry weather, non-irrigation area is conducive to the occurrence of disease. The root dwarf disease is very contagious, and the juice from the diseased cane is diluted to 10,000 times and still has infectious power. The contaminated sugarcane knife can still be transmitted in a dark place for 7 days. Pathogens can remain in the sugarcane head of the ratoon root after harvesting, and spread through rodents such as sugarcane seedlings, cane cutting tools, tillage equipment, and field mice. (2) Control methods 1 It is the best measure to prevent this disease by transporting sugarcane plantings from disease-free areas or selecting healthy sugarcane planted in disease-causing sugarcane fields. 2 Soak the seeds with hot water of 52°C for 30 minutes or soak in hot water of 50°C for 2 hours. 3 During the breeding process, the cane cutters and tillage tools should be separated from other types of operating tools, used separately, often disinfected, and field rodents should be eliminated promptly. After the promotion of new varieties, the above measures are still implemented to establish disease-free nurseries. After the rapid propagation of plant tissue culture without pathogenic meristems, a large number of virus-free healthy tissue culture seedlings can be obtained, and after the first and second seedling field breeding, healthy stems can be obtained for field production. . 4 before the next kind of deep plowing, fine soil preparation, Shizu base fertilizer. After the timely application of fertilizer to prevent drought, so that sugar cane enhance resistance. 5 In the severe sugarcane zone with ratooning disease, the cultivation period and cultivation area of ​​ratoon cane must be reduced. 6 In order to prevent the heat treatment and the original healthy cane species from being infected by the ratooning dwarf disease again, the regeneration cane must be completely removed from the breeding field. All utensils such as cane cutters and seeders must be brewed with boiling water, steam or fire before use. Disinfect. 7 Remove voles and other rodent pests that bite sugar cane to prevent the spread of germs. Desktop Type Dental Milling Machine The chair side CAD / CAM repair system has obvious advantages in aesthetic effect, operation time, patient participation and operation convenience. Discussion: traditional repair method: after the model is transferred, it will be sent to the technician's room for processing and making the final prosthesis. About one week, the final prosthesis will be tried on, grinded and bonded. The prosthesis was made in the technician's room. The patients need to accept the aesthetic effect of the prosthesis passively without any sense of participation. The implant repair method of chair side CAD / CAM system: obtain computer three-dimensional model by blue light scanning method, design and make personalized abutment and all ceramic restoration on computer, dye, glaze and bond after trial wearing, the whole restoration is made by chair side, patients can directly participate in the restoration design, and feel more involved. Conclusion: in the implant area of the anterior teeth, compared with the traditional implant repair method, the chair side repair system can get more satisfactory results, which is worthy of clinical application and promotion. Dental Equipment For Lab,Dental Implant Milling Machine,Titanium Dental Milling Machine,Glass Ceramic Dental Milling Machine Shandong Carved Intelligent Technology Group Co.,Ltd , https://www.demetdent.com