共查询到19条相似文献,搜索用时 46 毫秒
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拟松材线虫病的危害与防治 总被引:1,自引:0,他引:1
近年来 ,在贵阳市第一环城林带和其它松林区发现了拟松材线虫病和松墨天牛为害。 2 0 0 1、2 0 0 2年连续两年组织有关人员开展调查表明 ,拟松材线虫病在贵阳市危害十分严重 ,已造成大量松树枯死 ,对森林资源和环境构成严重威胁。1 危害特征拟松材线虫病 2 0世纪 80年代陆续在一些省区松林中发生 ,引起松树萎蔫 ,并造成一定的危害。此病多发生于一些成过熟林分中 ,由于松树生长衰弱 ,受次期害虫天牛、小蠹、吉丁虫等蛀干害虫危害 ,并携带拟松材线虫侵染松树后 ,加速了松树枯死。据观察 ,松树感染拟松材线虫后 ,其外部症状表现与松材线虫病… 相似文献
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松材线虫病于2003年在贵州省的遵义县发生,目前呈扩散趋势。本文针对松材线虫病的危害和传播特点,结合贵州实际情况,分析和探讨了治理措施,从而达到有效控制其传播速度和逐步根除的目的。 相似文献
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<正>松材线虫(Bursaphechus xylophilus)的近缘种拟松材线虫(Bursaphechus mucnatus),与松材线虫同属于滑刃线虫属,二者在形态上极为相似,但各自又是独立种。在进行松材线虫病监测调查时,对采集的样品分离鉴定,常见到拟松材线虫存在于萎蔫枯死松树的木质部中。 相似文献
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《中国森林病虫》2021,40(1)
采用描述性流行病学方法,对2019年各省(自治区、直辖市)上报的松材线虫病(Pine wilt disease,PWD)疫区数量、发生面积和病枯死松树数量进行汇总,分析全国松材线虫病疫情发生情况,为制定松材线虫病防控策略提供科学依据。结果表明:2019年全国共有18个省(自治区、直辖市)的666个县级行政区发生松材线虫病,发生总面积为111.46万hm~2,病枯死松树1 946.74万株;重庆、江西、湖北和浙江4省75%以上县级行政区发生松材线虫病,浙江、山东和江西3省疫情出现大暴发;200个疫区病枯死松树数量大于10 000株,发生面积占总发生面积的77.35%;59.04%的老疫区病枯死松树数量减少,超四成新疫区发现不及时;全国疫情持续扩散蔓延,造成危害持续加重,疫情防控和发展态势不容乐观。 相似文献
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应用GIS对松材线虫病进行信息管理 总被引:3,自引:0,他引:3
运用GIS可对影响松材线虫病Bursaphelenchus xylophilus的各个相关因素进行管理,通过其分析功能,根据生产实践的需要对松材线虫病的除治,隔离,保护,检疫做出科学的规划和管理。 相似文献
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Bursaphelenchus xylophilus is the pathogen that causes pine wilt disease, which has greatly damaged forests and ecosystems in countries of East Asia and Europe.Bursaphelenchus mucronatus is closely related to B. xylophilus in morphology and host plant specificity. A longrunning debate has existed regarding whether these two species can successfully produce hybrid offspring. In the present study, we performed in the laboratory, hybridization of two B. xylophilus nematode isolates from China and Japan and three B. mucronatus isolates from China, Japan and France. Nematode isolates of B. xylophilus were successfully crossed with B. mucronatus isolates, and the rate of hybridization was relatively high; however, some hybrid offspring died. Successful hybridization occurred between B. xylophilus and B. mucronatus isolates from China, and 22 generations of hybrids were produced. All F1 hybrids could be backcrossed with their parents and produce offspring. Variation in mucro length among the hybrid offspring and their parents was observed. The hybrid offspring and their parents were inoculated into 3-months-old black pine(Pinus tunbergii) seedlings. Weaker pathogenicity of hybrid offspring was observed compared with that of their parents, and significantly fewer offspring nematodes than parents were reisolated from pines. Therefore, the offspring of B. xylophilus and B. mucronatus may exist in the forest and could influence disease epidemics. 相似文献
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Jyrki Tomminen 《Forest Pathology》1993,23(4):236-243
The objective of the study was to determine the role of Finnish Bursaphelenchus mucronatus as a possible pathogen in Scots pine, Pinus sylvestris, under Finnish ambient weather conditions. Small seedlings and young field grown trees were used as inoculation targets. The results suggested the nematode being of minor importance as a tree pathogen in Finland. 相似文献
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