Pathogenicity of Spodoptera litura Nucleopolyhedrovirus with Different Temperatures

온도조건에 따른 담배거세미나방핵다각체병바이러스의 병원성 검정

  • 김선곤 (전남농업기술원 식물환경연구과) ;
  • 김도익 (전남농업기술원 식물환경연구과) ;
  • 박종대 (전남농업기술원 식물환경연구과) ;
  • 최형국 (전남농업기술원 식물환경연구과) ;
  • 유용만 (㈜경농중앙연구소)
  • Published : 2003.06.01

Abstract

This experiment was conducted to investigate pathogenicity of Spodoptera litura nucleopolyhedrovirus (SINPV) with different temperatures to mass production. In laboratory, LC$_{50}$ values of SINPV were 5.534$\times$10$^3$ PIBs/ml and 4.l0$\times$10$^2$PIBs/ml in 1st instar larvae at 2$0^{\circ}C$ and 28$^{\circ}C$, respectively, but those were increased at 32$^{\circ}C$. LC$_{50}$ at 3rd and 5th instar larvae were showed the lowest value at 28$^{\circ}C$. LT$_{50}$ values of SINPV in 1.0$\times$10$^{5.7}$ PIBs/ml were determined at various temperature conditions (20-32$^{\circ}C$). The result showed that treatments at 28$^{\circ}C$ and 32$^{\circ}C$ shortened LT$_{50}$ values, but treatments at 2$0^{\circ}C$ and 24$^{\circ}C$ was relatively longer. Also LT$_{50}$ values was shortened in high concentration and young larva. LT$_{50}$ values are dependent on the temperature, viral concentration and larval instar.

Keywords

Tabacco cutworm;Spodoptera litura;Nucleopolyhedrovirus;Pathogenicity;Temperature

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