Infection Threshold of SINPV to Larva of Spodoptera litura F.

Zhang Wenjun; Gu Dexiang

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Infection Threshold of SINPV to Larva of Spodoptera litura F.

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- Infection Threshold of SINPV to Larva of Spodoptera litura F.
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 35, Issue 3, Pages: 18-23(1996)
- 作者机构：
  
  中山大学昆虫学研究所、生物防治国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1996，
  
  Published Online：25 May 1996，
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Zhang Wenjun, Gu Dexiang. Infection Threshold of SINPV to Larva of Spodoptera litura F.. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 35(3):18-23(1996)
DOI：

Zhang Wenjun, Gu Dexiang. Infection Threshold of SINPV to Larva of Spodoptera litura F.. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 35(3):18-23(1996) DOI：

摘要

斜纹夜蛾核型多角体病毒（ＳＩＮＰＶ）对斜纹夜蛾幼虫的侵染阈值因温度和虫龄而异，虫龄愈大，温度愈高，则侵染阈值也愈大．在２０～４０℃内，３龄幼虫的侵染阈值为９０９０．９～６６６６６６．７ＰＩＢｓ／头，５龄幼虫为１３１５７８．９～７１４２８５．７ＰＩＢｓ／头．随温度升高，各龄幼虫的侵染阈值差异逐渐减少，接种量为２×１０６ＰＩＢｓ／头左右及高于２×１０７ＰＩＢｓ／头时，ＳＩＮＰＶ自身似有一定的协生作用和拮抗作用．作为病原体侵染阈值、致病性及寄主抗病性的指标，侵染阈值优于ＬＤ５０和ＬＣ５０，为解决病原体密度阈值的获取提供了一定的基础．

Abstract

The point location of insect is randomly and independently infected by the infectious pathogens. After the multiple-infection has been taken into account in total point locations

the infection threshold(TI) of the pathogen can be calculated. The results shown that the TI of nuclear polyhedrosis virus of Spodoptera litura F. (SINPV) was positively related to temperature and larval instars. Under the temperature of 20℃ to 40℃

the TI for 3rd instar were between 9 090. 9 PIBs and 666 666. 7 PIBs per larvae

and for 5th instar were between 131 578. 9 PIBs and 714 285. 7 PIBs per larvae. The TI differences between different instars were gradually reduced with the rising temperature. In some inoculum numbers

the infection of SINPV have certain self-antagonism and selfmutualism. As the indices describing infection threshold

pathogeneicity

and disease-resistance of insect

the TI is superior to LD50 and LC50.

关键词

斜纹夜蛾核型多角体病毒（SINPV）侵染阈值计算方法

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中山大学昆虫学研究所

中山大学生物防治国家重点实验室

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