| Project/Area Number |
08660053
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
植物保護
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
KUNIMI Yasuhisa Tokyo University of Agriculture and Technology, Department of Applied Biological Science, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (50195476)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1996: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Nucleopolyhedrovirus / Entomopoxvirus / Granulosis virus / Adoxophyes sp. / Competition / Occlusion body / Entomopathogenic virus / Multiplication |
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| Research Abstract |
The prevalence of viral diseases in a larval population of Adxophyes sp. in a tea field in Tsukuba was determined. Three entomopathogenic viruses, a nucleopolyhedrovirus (NPV), an entomopoxvirus (EPV) and a granulosis virus (GV) were isolated from the dead larvae. The EPV was the most common virus and was responsible for 23.1% of the deaths in the Adoxophyes sp. larvae . More than 25% of larvae were infected with two or more of the viruses simultaneously.
Competitions between NPV and EPV or GV in larvae of the smaller tea tortrix, Adoxophyes sp. were investigated under a laboratory condition. When the fourth instar larvae of Adoxophyes sp, were infected with NPV,progeny viral oculusion bodies began to produce at day 5 post infection. When the fourth instar larvae of Adoxophyes sp. were infected with EPV,progeny viral occulusion bodies began to produce at day 10 post infection. However, no viral occlusion bodies of EPV were produced when the fourth instar larvae of Adoxophyes sp, were simultaneously infected with NPV and EPV.These data suggested that NPV had the most competitive ability among three entomopathogenic viruses. Difference in competitive ability among three viruses seems to originate from difference in values of the intrinsic rate of natural increase of these viruses.
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