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在南京用松材线虫接种 7种松树 ,于第 2a在无任何症状的松树的接种点上方 10cm处取样 ,分离线虫。结果表明松材线虫病的潜伏侵染现象比较普遍。在不同的松树品种上潜伏侵染现象有所差异。感病黑松和赤松很快死亡 ,只有在接种量小的情况下才有潜伏侵染现象发生。抗病性强的火炬松和湿地松感病后潜伏侵染现象比较普遍 ,并且样品中的线虫量也较高。而抗病性中等的马尾松和刚松感病后潜伏侵染现象的普遍性及样品中的线虫量均处于中等。短针松接种松材线虫后既不枯死 ,也无潜伏侵染现象。松墨天牛传播松材线虫的试验结果表明 ,未携带松材线虫的松墨天牛成虫在松材线虫病松枝上取食后 ,再到健康松枝上取食 ,有传播松材线虫的可能。这些结果表明在松材线虫病新病区清理病死木时 ,应采取早期诊断技术 ,把未表现症状的松树一起清除 ,以达到防治目的。
Seven pine trees were inoculated with pine wood nematode in Nanjing and samples were taken 10 cm above the inoculation point of the pine tree without any symptoms in section 2a to isolate nematodes. The results show that the latent infection of pine wilt disease is more common. There are differences in latent infection on different pine species. Sick black pine and Japanese pine quickly died, and latent infection occurred only when the inoculation amount was small. The susceptibility to disease loblolly pine and slash pine susceptible latent infection is more common, and the nematodes in the sample is also higher. However, the prevalence of latent infection and the number of nematodes in the samples after moderate resistance to P. massoniana and fresh-to-pine susceptibility were moderate. Short needle pine inoculated with pine wood nematode neither dead nor latent infection. Monochamus alternatus Propagation of Bursaphelenchus xylophilus The results showed that Monochamus alternatus adults that did not carry Bursaphelenchus xylophilus had the potential to spread Bursaphelenchus xylophilus . These results indicate that in the treatment of dead wood disease in the new ward disease of pine wood nematode, early diagnosis should be taken to eliminate the symptom-free pine trees in order to achieve the purpose of prevention and treatment.