symptom Rice seedlings start from the three leaf stage. At the beginning, the tip of the leaf turns white, and then spreads along the main vein. It extends to the base of the leaf. It develops from the midrib to the leaf margins on both sides. The whole leaf is white, and some of the leaves are white. The leaf margin remains green, the color of the leaf sheath fades and turns purple, and then it turns to yellow-brown. Some disease conditions of the seedlings develop rapidly. Several green leaves develop lesions at the same time and turn into white seedlings. Later, the new leaves and the leaves of the tiller are formed. It is also white, and the development of the disease is slow. In general, the 6 to 7 leaf stage gradually turns green again, and the disease is severe in the 4 to 5 leaf stage. Causes According to relevant information, white rice seedlings occur in Putian where urea is used as a base fertilizer. The occurrence of albinism is also related to climate, and the weather with an average temperature lower than 16°C for 3 days after sowing is susceptible to disease. Control methods 1, Putian do not use less or less fertilizer (especially urea) as the base fertilizer, topdressing should be carried out in the three-leaf stage, divided application. 2, sowing as sunny as possible. 3, sick fields can be trace elements such as fertilizers such as zinc sulfate or ferrous sulfate, zinc sulfate with 1 ~ 2 kg, ferrous sulfate with 1 kg of mu. Demetdent announced the release of the our company`s wet/dry milling machine. It was added to the Demetdent family of Dental Milling devices in answer to our lab and dental users need for a wet-milling option to handle many of the new brands and materials. The wet/dry milling machine fills a gap in many dental restoration workflows, giving laboratories the added flexibility of milling glass ceramic, composite resin materials that are becoming increasingly popular in the industry due to their high translucency, increased flexural strength and hardness, and overall aesthetic value for inlay/onlays. Cerec Machine,Dental Machine,Dental Milling Machine,Teeth Cleaning Machine Shandong Carved Intelligent Technology Group Co.,Ltd , https://www.demetdent.com