The Virulence of <i>Nomuraea rileyi</i> Nr0815 against the Different Instars of <i>Spodoptera litura</i> Larvae

Jinyao SU; Siyu LIU; Xiaobo YIN; Liangyu ZI; Yanxia HU; Guangzu DU; Bin CHEN

doi:10.12101/j.issn.1004-390X(n).201708002

JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science） > 2018 > 33(3): 416-421. > DOI: 10.12101/j.issn.1004-390X(n).201708002

Jinyao SU, Siyu LIU, Xiaobo YIN, et al. The Virulence of Nomuraea rileyi Nr0815 against the Different Instars of Spodoptera litura Larvae[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2018, 33(3): 416-421. DOI: 10.12101/j.issn.1004-390X(n).201708002

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The Virulence of Nomuraea rileyi Nr0815 against the Different Instars of Spodoptera litura Larvae

1.
College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China
2.
Dai Branch of Yunnan Provincial Tobacc Company, Dali 671000, China

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Received Date: August 22, 2017
Revised Date: October 15, 2017
Available Online: July 18, 2018
Published Date: April 30, 2018

Graphical Abstract

Abstract

Abstract

Purpose The aim of this study was to explore the virulence of Nomuraea rileyi strain Nr0815 against different instars of Spodoptera litura larvae.

Method The mortalities of 2-5 instars of S. litura larvae infected by N. rileyi suspension were respectively measured by impregnation method.

Result From the perspective of the corrected mortality rate, of the same age when the moth larvae vaccination, calibration of larval mortality increased with the rising of the inoculation concentration, the calibration of larval mortality between different inoculation concentration has significant difference (P<0.05). During the age of corrected mortality in 10⁷ concentrations inoculated with spore/mL there was no significant difference (P>0.05), 10³-10⁶ and 10⁸ concentrations were inoculated with spore/mL exist significant difference (P<0.05), and with 2 instars correction rates were the highest.

Conclusion N. rileyi strain Nr0815 had certain pathogenic effect against 2-5 instars of S. litura larvae, and it had the strongest virulence against 2 instars of S. litura larvae.
- Nomuraea rileyi,
- Spodoptera litura,
- median lethal time (LT₅₀),
- median lethal concentration (LC₅₀)

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References

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The Virulence of Nomuraea rileyi Nr0815 against the Different Instars of Spodoptera litura Larvae

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