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黄刺蛾 Cnidocampa flauescens(wal-ker)。为害43种木本植物。在双辽、梨树等县曾大发生,虫口密度高达500—600头/株,受害林枯枝、焦梢,有的成片枯死。核型多角体病毒(NPV)对抑制黄刺蛾为害起重要作用。现将几年来调查与利用情况介绍如下。一、病毒流行林分调查在小叶杨、小黑杨13—19年生,树高7.6—8米,郁闭度0.7—0.8的 NPV 病源地,选6块样地(1350亩)进行调查,结果见表1、2。调查证明:1、黄刺蛾 NPV 流行的林分,病毒体能保留6年以上。2、病毒体有连年对寄主感病作用。3、自然感病率高,平均47％,最高100％。4、1979—1984年,分三个阶段调查,看
Cnidocampa flauescens (wal-ker). Damage to 43 kinds of woody plants. In Shuangliao and Lishu counties, great occurrence occurred. Insects population density was as high as 500-600 heads per plant. Nucleocapsid Polyhedrosis Virus (NPV) plays an Important Role in Inhibiting Tettigoniidae. Now years of investigation and utilization are as follows. First, the virus epidemic forest survey Populus, Populus 13-19 years old, tree height 7.6-8 meters, canopy density 0.7-0.8 NPV source, choose 6 plots (1350 acres) survey, the results See Table 1 and 2. Investigation shows that: 1, the sting moth NPV popular stand, the virus physical retention for 6 years. 2, the virus body has years of host susceptible role. 3, natural high prevalence, an average of 47%, up to 100%. 4, 1979-1984, divided into three stages of investigation, look