摘要
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。
The gall rust of Pinus massouaina occured in six counties of the Qinba Mountains, ofwhich the most serious infection was found in Nanzheng county. Globose or subglobose gallswere produced on the stems, branches or air-roots of infected pines. In late April, aecia brokethrough the bark. The quantity and quality of seeds from diseased branches decreased significantly. The diseased trees growed slower than heathy trees. The results of inoculation in the field indicated that seven species of oaks were the alternate hosts of the disease, among them Quercusacutissima, Q. dentata and Q. variabilis were the most susceptible to the disease and then followed by Q. aliena var. acuteserrata and Q. glandulifera var. brevipetiolata. Castanea seguiniiand C. mollissima were the most resistant to the disease.
出处
《西北林学院学报》
CSCD
1995年第4期21-26,共6页
Journal of Northwest Forestry University
关键词
马尾松
瘤锈病
危害
病原菌
秦巴山区
Pinus massoniana
gall rust
damage
pathogen
alternate host
