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乌桕毒蛾(Euproctis bipunctapex Hampson)是乌桕的重要害虫。分布予浙江、江西、福建、湖南、广西等省区。1985年5月下旬,我们在南京市铁心桥乡乌桕林内,发现乌桕毒蛾幼虫自然罹病死亡。幼虫染病后,早期症状不明显,稍后表现食欲不振,取食量渐减,行动和反应迟钝,体色变淡,死亡时呈“∧”形或倒挂下垂于枝叶上。死亡虫尸体内组织液化,体壁易破,会流出乳黄色体液。虫尸体经捣碎、过滤、差速离心和蔗糖梯度离心等处理,分离物呈乳白色,镜检分离液,能见到大量折光性很强的多角体。经透射电镜观察,多角体呈三角形或不规则的四边形、六边形和近似圆形等多种形状,
Euproctis bipunctapex Hampson is an important pest of Opuntia. Distribution to Zhejiang, Jiangxi, Fujian, Hunan, Guangxi and other provinces. In late May 1985, we found the natural death of the moth larvae in the Toxinqiao Township, Nanjing City. After the larvae were infected, the early symptoms were not obvious. Later, they showed loss of appetite, decreased food intake, slowness of action and reaction, faded body color and drooping “Λ” shape or hanging upside down on branches and leaves. Death dead body tissue liquefaction, easy to break the body wall, will shed milk yellow body fluids. The body of the insect was mashed, filtered, differential centrifugation and sucrose gradient centrifugation and the like, the isolate was milky white, and the microscopic examination liquid could see a great deal of polyhedron with strong refraction. By transmission electron microscopy, polygonal body was triangular or irregular quadrilateral, hexagonal and approximately circular and other shapes,