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中国生物防治学报 ›› 2025, Vol. 41 ›› Issue (4): 819-825.DOI: 10.16409/j.cnki.2095-039x.2024.11.009

• 研究论文 • 上一篇    

替代宿主甜菜夜蛾增殖马尾松毛虫质型多角体病毒条件优化

赵正萍, 张敏, 夏永刚, 钟武洪, 颜学武   

  1. 湖南省林业科学院/国家林业和草原局南方天敌繁育与应用工程技术研究中心, 长沙 410004
  • 收稿日期:2024-06-24 发布日期:2025-08-15
  • 通讯作者: 张敏, 颜学武
  • 作者简介:赵正萍,硕士,助理研究员,E-mail: zzping1989@163.com。通信作者,张敏,硕士,助理研究员,E-mail: 373471277@qq.com;颜学武,博士,研究员,E-mail: 123124061@qq.com。
  • 基金资助:
    湖南省财政林业有害生物防治项目(LB2024A006);湖南省省级财政其他林业特色产业(林下经济)项目(LB2024A010)

Optimisation of Conditions for the Proliferation of DpCPV by Alternative Host, Spodoptera exigua (Lepidoptera: Noctuidae)

ZHAO Zhengping, ZHANG Min, XIA Yonggang, ZHONG Wuhong, YAN Xuewu   

  1. Southern Natural Enemies Breeding and Application Engineering Research Center of National Forestry and Grassland Administration/Hunan Academy of Forestry, Changsha 410004, China
  • Received:2024-06-24 Published:2025-08-15

摘要: 甜菜夜蛾是马尾松毛虫质型多角体病毒(DpCPV)增殖的优势替代宿主之一。为明确甜菜夜蛾对DpCPV的最佳增殖条件,本文采用活体增殖法,比较不同DpCPV接种量-虫龄组合、接种频率、甜菜夜蛾幼虫饲养温度及饲养密度对DpCPV增殖量的影响。结果表明:相同DpCPV接种量条件下,甜菜夜蛾各龄幼虫对DpCPV的增殖量均呈先上升后下降趋势,但随着DpCPV接种量的增加,2龄幼虫对DpCPV的增殖量呈先上升后下降趋势,3~5龄幼虫对病毒的增殖量呈持续上升趋势。另外,DpCPV增殖量均随着接种频率、饲养温度、饲养密度的上升呈下降趋势。综合上述条件,替代宿主甜菜夜蛾对DpCPV的最佳增殖组合条件为:甜菜夜蛾幼虫龄期为3龄,DpCPV接种浓度为1×106 PIB/mL(接种剂量5×103 PIB/头),接种频率为1次,饲养温度为20℃,饲养密度为100头/盒(0.05头/cm2),在此条件下DpCPV增殖量达到2.01×109 PIB/头。研究结果为DpCPV室内工厂化生产技术体系建立及林间推广应用提供理论基础和技术支撑。

关键词: 替代宿主, 甜菜夜蛾, 马尾松毛虫质型多角体病毒, 病毒增殖, 条件优化

Abstract: Spodoptera exigua is one of the dominant alternative hosts for the proliferation of Dendrolimus punctatus cytoplasmic polyhedrosis virus (DpCPV). The optimal conditions for the proliferation of DpCPV in S. exigua were determined in this study through employing an in vivo amplification method to compare the effects of various DpCPV inoculum doses, larval stage, inoculation frequency, feeding temperature and larval density on proliferation of DpCPV. The results showed that under the same DpCPV inoculum doses, the proliferation of DpCPV in S. exigua increased first and then decreased. With the increase of DpCPV inoculum doses, the proliferation of DpCPV in the 2nd instar larvae of S. exigua increased first and then decreased, and the proliferation of DpCPV in the 3rd to 5th instar larvae of S. exigua continued to increase. In addition, the proliferation of DpCPV decreased with the increase of inoculation frequency, feeding temperature and larval density. These results showed that the optimal combination conditions for the proliferation of DpCPV in S. exigua are: DpCPV inoculum concentration of 1×106 PIB/mL (the inoculum dose of 5×103 PIB/larva) in the 3rd instar larvae of S. exigua, and the inoculation frequency of 1 time, the feeding temperature of 20 ℃, the feeding density of 100 larvae/box (0.05 larvae/cm2), which resulted in proliferation of DpCPV at 2.01×109 PIB/larva. The results provide theoretical basis and technical support for industrialized production and forest application of DpCPV.

Key words: alternative host, Spodoptera exigua, Dendrolimus punctatus cytoplasmic polyhedrosis virus (DpCPV), virus proliferation, condition optimization

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