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柏毛虫(Dendrolimus suffuscus Lajonquiere)又称侧柏毛虫、铁杉毛虫,分布在山东、江苏和山西等地,寄主范围较窄,主要危害侧柏(《中国森林昆虫》1983)。1980年前后肥城县北部山区几百亩柏林严重发生柏毛虫危害,大发生后接着自然发生疾病流行,引起柏毛虫大量死亡。我们从病区采集自然病死虫尸进行分离,鉴定病原体是一株核型多角体病毒。几年来对该株病毒进行室内毒力测定和野外感染试验,结果报道如下。
Dendrolimus suffuscus Lajonquiere, also known as Platycladus orientalis and Hemlock caterpillars, are distributed in Shandong, Jiangsu and Shanxi provinces. Their host range is narrow and the main damage to Platycladus orientalis (“China Forest Insects” 1983). Before and after 1980, several hundred mu of bermudagrass in Berlin’s northern mountainous area of Feicheng County suffered serious damage from cypress disease. After the occurrence of the disease, a natural epidemic occurred which led to a large number of deaths of cypress caterpillars. We collected natural diseased dead carcasses from the ward for identification, and identified the pathogen as a nuclear polyhedrosis virus. In recent years, the strain of virulent indoor virus testing and field tests, the results reported below.