油松与赤松疱锈病病原及转主的研究

油松与赤松疱锈病是两针松类枝干上的重要病害,从油松和赤松主干病皮上取锈孢子分别向山芍药、芍药、返顾马先蒿、轮花马先蒿、长白茶藨子、东北茶藨子、香茶藨子和刺李进行室内和室外人工接种试验,终于在山芍药、芍药上接种成功,产生与自然状态下相同的典型症状。同样方法用夏孢子接种也都成功,在两种芍药上所产生的夏孢子堆与冬孢子柱以及夏孢子与冬孢子的形态也基本相同。由此可以肯定,油松疱锈病与赤松疱锈病是同一病原,病原菌为松芍柱锈菌cronartium flaccidum(Alb·et Schw·)Wint]。取锈孢子用同样方法经多次在返顾马先蒿、轮花马先蒿、长白茶藨子、东北茶藨子、香茶藨子和刺李上接种,均未成功,因此认为这些植物与此两种疱锈病的发生无关,两种疱锈病在辽宁的转主寄主是山芍药(Paeonia obovata Haxim.)和芍药(P.lactiflora Pall.)。

A STUDY ON THE PATHOGEN AND THE ALTERNATE HOSTS OF BLISTER RUSTS OF CHINESE PINE AND JAPANESE RED PINE

The blister rusts of Chinese pine and Japanese red pine are most seri- ous on the branches and stems of the double needlelike leaf pines.The aecidiospores taken from the diseased barks of Chinese pines and Japanese red pines were separately inoculated on Paeonia obovata Haxim,P.lactiflora Pall.,Pedicularis resupinata L.,P.verticillata L.,Ri- bes komrovii A.Poark.,R.manschuricum(Maxim.)Kom.],R.odoratum Wendl.andGro- ssularia burejensis(Er.Schmidt)Berger]both indoors and outdoors.Inoculations were suc- cessful only on the peonies.Typical symptoms appeared on the leaves.Inoculations with ure- diniospores were also successful.On peonies urediniospore,uredium,teleutospore and te- leutosorus are of same shape.It was therefore confirmed that the blister rust of Chinese pine and the blister rust of Japanese red pine are caused by the same pathogen——Cronartium flaceidum(Alb.et Schw.)Wint.] It was not successful to inoculate the pathogen on other tested plants.The alternate hosts of the blister rusts in Liaoning Province,based on our inoculation results,are Paeonia obovata Haxim.and P.lactiflora Pall.