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一、用中肠细胞质多角体病毒防治油松毛虫油松毛虫分布于日本的本州、四国和九州;中国的东北、华北,朝鲜及西伯利亚东部也有。日本的受害面积每年约5万公顷。油松毛虫的寄主树种主要是赤松和日本黑松。松树的针叶全被吃光,由于不能像阔叶树种那样萌芽而枯死。火炬松和斑克松等国外引入树种有时同样受害。(一)油松毛虫的疾病油松毛虫可检出病原体16种(见附表),其中在自然发生地上呈现流行病景象的有黄僵病和软化病(病毒性?)。黄僵病菌不拘虫态,从幼龄幼虫到成虫都可发病,而软化病只
First, with the midgut cytoplasmic polyhedrosis virus prevention and treatment of oil pine caterpillar Pine oil caterpillar distributed in Japan’s Honshu, Shikoku and Kyushu; China’s northeast, north China, North Korea and eastern Siberia also. The area of victimization in Japan is about 50,000 hectares annually. The main species of Pinus tabulaeformis is Pinus sylvestris and Japanese black pine. The needles of pine trees are all eaten, and can not die because they are not sprouting like broadleaf trees. The introduction of tree species from abroad, such as loblolly pine and Baxter, is sometimes equally damaging. (1) Diseases of Dendrolimus tabulaeformis Dendrolimus punctatus detects 16 species of pathogens (see attached table). Among them, there are yellow stiff and softening diseases (viral?) That present epidemics on the ground where they naturally occur. Huang Zong bacteria insects zhuang state, from young larvae to adults can be disease, and soften the disease