Early onset, the upper part of the blade tip and leaf margin chlorosis produce small water-soaked spots, red maple (Fig. 4) then as the progression of the disease, the Ministry of disease appear scorched like Weifang American Maple, and gradually to the lower part of the blade and internal expanded blade half dead. Disease and Health Department of the Ministry of the junction of russet American maple, for the deep red of the last three-quarters of the entire dead leaves, only green leaf base, the dead part of the tip curled, pale, the whole plant leaves like fire. Since the leaves lose chlorophyll, seriously affecting photosynthesis, the plants grow weak US maple seedling stems, the loss of aesthetic value. Maple seedlings in extreme market chaos, good vital seed varieties to pick a reliable company to buy, otherwise we will lose everything. American maple species in the country no less than 30 species, not easy to distinguish. Especially seedlings stage can only distinguish from the blade, planting red maple leaves only 10 years who can not be 100% distinguish species, growers generally more impossible to distinguish; while most American red maple leaves are in the seedling stage there are manifestations such varieties distinguish more confusing. Buy seedlings must choose a brand with quality provenance of the company. Weifang Grand American maple seedlings _ (certified) _ United States provided by Weifang Grand Maple seedling cultivation base. Weifang Grand seedling cultivation base (www.wfsdmm.com) Shandong Weifang, flowers leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the grand seedlings leadership with the staff warmly welcome all inquiries negotiations to create a better future grand seedlings.