松瘤病[Cronartium quercuum(Berk.)Miyake et Shirai]在马尾松和黑松上经常发生,据观察发现病菌在其转主寄主—栎属树木上形成夏孢子堆和冬孢子堆的量因树种而有明显的差异。笔者前曾以赤松和黑松上的锈孢子分别作接种源,接种在数种栎属寄主上,结果显示了不同接种源对其转主寄主的致病性确是有明显的差异。本报告作为前一试验的继续,把不同来源的冬孢子堆(担孢子)作为接种源,对锈孢子世代的寄主接种,看其致病性是否有明显的差别。其方法是:分别于赤松和黑松标准株上采 Plover’s disease [Cronartium quercuum (Berk.) Miyake et Shirai] occurs frequently in Pinus massoniana and Pinus thunbergii and it has been observed that the amount of summer orchid spores and teliospores formed by the germs on their main host, Quercus, There are obvious differences. Previously, the authors used the rust spores of Pinus tabulaeformis and Pinus thunbergii as inoculation sources and inoculated on several species of Quercus host, and the results showed that the pathogenicity of different inoculation sources to their host was indeed significantly different. As the continuation of the previous experiment, the present report used teliospores (basidiospores) from different sources as inoculation sources to inoculate hosts of the rust-spore generation to see if there is a clear difference in their pathogenicity. The method is: separately in the red pine and black pine standard strains on mining