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fang zhi song ku bing de shu gan zhu ru ji
Author(s): 
Pages: 60-61
Year: Issue:  3
Journal: Agrochemicals

Keyword:  松毛虫松树树干注入胸高直径松叶注入剂农林林业自然生长枯病;
Abstract: <正> “松叶变红”为主要症状的松枯病在日本各地蔓延,使国家受到很大损失。日本农林水产省从1969年开始对“食松虫类引起的松枯病”的防治进行研究。逐步弄清楚松枯病是由于松毛虫咬松树后,松树线虫(Bursophelenchus xylophilus)乘机入侵。松树感染了松树线虫后在较短的时间内就会出
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