Factors affecting both the numbers of the pinewood nematode, Bursaphelenchus xylophilus (Nematoda: Aphelenchoididae), carried by the Japanese pine sawyer, Monochamus alternatus (Coleoptera: Cerambycidae), and the nematode's life history
Factors affecting both the numbers of the pinewood nematode, Bursaphelenchus xylophilus (Nematoda: Aphelenchoididae), carried by the Japanese pine sawyer, Monochamus alternatus (Coleoptera: Cerambycidae), and the nematode's life history
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DOI：
10.1303/aez.31.443
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发表时间：
1996-08-01
影响因子：
1.3
通讯作者：
Futai, K
中科院分区：
文献类型：
--
作者：
Maehara, N;Futai, K
松材线虫的数量远高于接种木霉的松材线虫数量。2、木霉(Trichoderma sp.)3个或未接种的块。这是因为：1)菌丝在未接种菌株中的繁殖效果要比在木霉中好得多。接种或未接种组幼虫的第三阶段散布幼虫和达尔幼虫占总幼虫数的比例，以及转移成甲虫的幼虫占总幼虫数的比例，前者明显高于后者。即使在没有松墨天牛的情况下，也会发生第三阶段的幼体扩散，但松墨天牛的存在提高了幼虫的比例。相反，松墨天牛对达尔幼虫的发生是必不可少的。主宰枯木的真菌种类可能决定了从枯木中冒出的甲虫携带的松材线虫数量。
The Japanese pine sawyer, Monochamus alternatus, which emerged from wood blocks inoculated with a species of blue-stain fungus Ophiostoma minus, carried a far greater number of pinewood nematodes (PWNs), Bursaphelenchus xylophilus, than those from wood blocks inoculated with Trichoderma sp. 2, Trichoderma sp. 3 or uninoculated blocks. This was because: 1) PWNs propagated much better in the O. minus-inoculated blocks than in the Trichoderma spp. inoculated or uninoculated blocks; and 2) the ratios of third-stage dispersal juveniles and dauer juveniles to total PWNs, and the ratio of PWNs which transferred to a beetle to total PWNs were much higher in the former than in the latter. Third-stage dispersal juveniles occurred even in the absence of M. alternatus, however, the presence of M. alternatus raised their percentage. In contrast, M. alternatus was essential for the occurrence of dauer juveniles. The species of fungi dominating the dead wood might determine the number of PWNs carried by the beetles which emerge from the wood.