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马尾松瘤锈病在秦巴山区分布于南郑、宁陕等５个县（区），其中南郑县发生严重。被害松树在主干、侧枝和裸根上形成肿瘤，每年４月中旬在瘤上形成铁孢子器。马尾松病枝的结实量减少，种子质量明显下降；受害幼树的地茎和树高比健树均有减少。该病的病原菌为松栎栓锈菌（Ｃｒｏｎａｒｔｉｕｍｑｕｅｒｃｕｕｍ（Ｂｅｒｋ．）Ｍｉｙａｂｅ）。病菌锈孢子在２％琼脂膜上萌发较好，自来水中萌发较差。人工接种证明，７种栎（栗）类为该病的转主寄主。其中，麻栎、栓皮栎、槲树栎最为感病；其次为锐齿栎和短柄栎；茅栗、板栗最为抗病。
Pinus massoniana disease is distributed in 5 counties (districts), including Nanzheng and Ningshan in the Qinling and Ballad areas. Nanzheng County is serious. Victims of pine in the trunk, collateral and bare roots on the formation of tumors, mid April each year in the tumor formation of sporulated iron spore. The mass of Pinus massoniana decreased, and the quality of seeds obviously decreased. The stems and tree height of damaged saplings decreased compared with that of healthy trees. The pathogen is Cronartiumquercuum (Berk.) Miyabe. Germination of spores on 2% agar membrane germination is better, less germination in tap water. The artificial inoculation proved that seven kinds of oak (chestnut) class as the main host of the disease. Among them, Quercus acutissima, Quercus variabilis and Quercus acutissima were the most susceptible species, followed by Quercus acutissima and Quercus acutissima.