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中国生物防治学报 ›› 2020, Vol. 36 ›› Issue (2): 196-202.DOI: 10.16409/j.cnki.2095-039x.2020.02.005

• 研究论文 • 上一篇    下一篇

春尺蠖新病毒株的鉴定及其对春尺蠖核型多角体病毒的增效作用

王承锐1,2, 李恩杰3, 王少博2, 王青华2, 王玉珠2, 张永安2,3, 段立清1   

  1. 1. 内蒙古农业大学林学院, 呼和浩特 010019;
    2. 中国林业科学研究院森林生态环境与保护研究所/国家林业和草原局森林保护重点实验室, 北京 100091;
    3. 中国林业科学研究院华北林业实验中心, 北京 102300
  • 收稿日期:2019-06-14 出版日期:2020-04-08 发布日期:2020-04-16
  • 通讯作者: 段立清,教授,E-mail:duanlq2013@163.com
  • 作者简介:王承锐,硕士研究生,E-mail:wangchr2017@163.com
  • 基金资助:
    国家重点研发计划(2018YFD0600202)

Identification of New Virus Strain of Apocheima cinerarius and Its Synergistic Effect on A. cinerarius Nucleopolyhedrovirus

WANG Chengrui1,2, LI Enjie3, WANG Shaobo2, WANG Qinghua2, WANG Yuzhu2, ZHANG Yongan2,3, DUAN Liqing1   

  1. 1. Forestry College, Inner Mongolia Agricultural University, Huhhot 010019, China;
    2. Research Institute of Forest Ecology Environment and Protection, Chinese Academy of Forestry/Key Laboratory of Forest Frotection, State Forestry and Grassland Administration, Beijing 100091, China;
    3. North China Forestry Experimental Center, Chinese Academy of Forestry, Beijing 102300, China
  • Received:2019-06-14 Online:2020-04-08 Published:2020-04-16

摘要: 春尺蠖在我国危害严重,为了挖掘具有开发潜力和应用前景的生防因子,本文分离纯化一株能够感染春尺蠖幼虫的新病毒,生物活性测定了新病毒株的毒力及其对春尺蠖核型多角体病毒(ApciNPV)的增效作用。新病毒株的超微结构观察表明,该病毒多角体多为切面呈六边形的多面体,直径大小为0.32~1.20 μm,病毒粒子呈近球状,具有质型多角体病毒的结构特征,命名为春尺蠖质型多角体病毒(ApciCPV)。生物活性测定结果显示,ApciCPV对春尺蠖3龄幼虫有很强的毒力,半致死浓度(LC50)为1.42×104 OBs/mL。当感染春尺蠖3龄幼虫时,ApciCPV可使ApciNPV半致死时间(LT50)缩短0.50~10.90 d,使ApciNPV对春尺蠖的最终致死率提高6.70%~43.33%。根据最终致死率、LT50以及ST三个值综合决定,当ApciNPV和ApciCPV配比浓度分别为1.0×106和1.0×104 OBs/mL时,对春尺蠖3龄幼虫的感染效率最高。新分离的ApciCPV病毒株是控制春尺蠖虫口密度的理想生物因子。

关键词: 春尺蠖质型多角体病毒, 春尺蠖核型多角体病毒, 春尺蠖, 增效作用

Abstract: Apocheima cinerarius (Erschoff) is one of the major insect pests in China. A new virus strain that can infect the larvae of A. cinerarius was isolated and purified, and measured for its virulence and synergistic effect to A. cinerarius nucleopolyhedrovirus (ApciNPV). The ultrastructural observation of the new strain showed that the virus was mostly of a hexagonal polyhedron, with a diameter of 0.32~1.20 μm, and with nearly spherical virion. With the structural features of a cypovirus, the virus was named as ApciCPV. Biological activity assays showed that ApciCPV was virulent against the 3rd instar larvae of A. cinerarius, with LC50 of 1.42×104 OBs/mL. Interestingly, ApciCPV showed a synergistic effect to ApciNPV. When the 3rd instar larvae of A. cinerarius were exposed to ApciCPV in combination with ApciNPV, LT50 of ApciNPV to the larvae was significantly shorten by 0.50-10.90 d, and the final lethal rate of ApciNPV increased by 6.70%-43.30%. Based on mortality, LT50 and ST, the mixed solution of 1.0×106 OBs/mL ApciNPV and 1.0×104 OBs/mL ApciCPV, has the most virulence against the 3rd instar larvae of A. cinerarius. These results show that the newly discovered viral strain, ApciCPV, is one of the ideal biological agents to control A. cinerarius.

Key words: A. cinerarius cypovirus, A. cinerarius nucleopolyhedrovirus, Apocheima cinerarius, synergistic effect

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