近来发现,局部地区泡桐花叶病害较严重,山东省林科所曾检出一种棒状病毒,并证明该病毒能引起花叶病。为弄清病原,本人对此类病害进行了病原探索。在自然条件下,患花叶病的树木整株叶片呈不规则退绿及皱缩变形现象。采典型病叶(见图1),用常规摩擦接种方法接种在枯斑三生烟(Nicotiana tabacum var. Xanthi-NC)、心叶烟(N. glutinosa)、黄瓜(Cucumis sativus)、豇豆(Vigna sinensis)、绿豆(Phaseolus aureus)、 Recently, it was found that in some areas, paulownia mosaic disease is more serious. Shandong Provincial Forestry Bureau once detected a coryneform bacterium and proved that the virus can cause mosaic disease. To understand the pathogen, I conducted a pathogen exploration of such diseases. Under natural conditions, the whole plant leaves of mosaic disease showed irregular regression and shrinkage deformation. Typical diseased leaves (Figure 1) were inoculated into Nicotiana tabacum var. Xanthi-NC, N. glutinosa, Cucumis sativus, Vigna sinensis, Phaseolus aureus,