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EFFECTS OF LARVAL AGE ON SUSCEPTIBILITY OF SPODOPTERA LITURA (LEPIDOPTERA: NOCTUIDAE) TO SPODOPTERA LITURA MULTIPLE NUCLEAR POLYHEDROSIS VIRUS

  • M.D. Monobrullah (a1) and Masao Nagata (a1)

Extract

Susceptibility of many insects to baculoviruses decreases with host development (Hochberg 1991), whereas the time required for infected hosts to die increases with larval age (Boucias et al. 1980; Bucher and Turnock 1983; Smits and Vlak 1988). The actual mechanism of this phenomenon, however, has not been established in many cases. The present study was undertaken to investigate the effect of larval age on the susceptibility of Spodoptera litura Fabricius to nuclear polyhedrosis virus (NPV) through oral and intrahaemocoelic routes of infection.

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1 Author to whom all corresponding should be addressed (E-mail: manawar@ss.ab.a.u-tokyo.ac.jp).

References

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Boucias, D.G., Johnson, D.W., Allen, G.E. 1980. Effect of host age, virus dosage, and temperature on the infectivity of a nucleopolyhedrosis virus against velvetbean caterpiller, Anticarsia gemmatalis, larvae. Environmental Entomology 9: 5961
Bucher, G.E., Turnock, W.J. 1983. Dosage responses of the larval instars of the bertha armyworme, Mamestra configurata (Lepidoptera: Noctuidae), to a native nuclear polyhedrosis virus. The Canadian Entomologist 115: 341–9
Cherry, A.J., Parnell, M.A., Grzywacz, D., Jones, K.A. 1997. The optimization of in vivo nuclear polyhedrosis virus production in Spodoptera exempta (Walker) and Spodoptera exigua (Hubner). Journal of Invertebrate Pathology 70: 50–8
Evans, H.F. 1981. Quantitative assessment of the relationship between dosage and response of the nuclear polyhedrosis virus of Mamestra brassicae. Journal of Invertebrate Pathology 37: 101–9
Finney, D.J. 1971. Probit analysis. 3rd ed. New York: Cambridge University Press.
Hochberg, M. 1991. Viruses as costs to gregarious feeding behaviour in the lepidoptera. Oikos 61: 291–6
Okada, M. 1977. Studies on the utilization and mass production of Spodoptera litura nuclear polyhedrosis virus for control of the Tobacco cutworm, Spodoptera litura Fabricius. Review of Plant protection Research 10: 102–28
Smits, P.H., Vlak, J.M. 1988. Biological activity of Spodoptera exigua nuclear polyhedrosis virus against S. exigua larvae. Journal of Invertebrate Pathology 51: 107–14
Teakle, R.E., Jensen, J.M., Giles, J.E. 1986. Age-related susceptibility of Heliothis punctigera to a commercial formulation of nuclear polyhedrosis virus. Journal of Invertebrate Pathology 36: 281–2

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EFFECTS OF LARVAL AGE ON SUSCEPTIBILITY OF SPODOPTERA LITURA (LEPIDOPTERA: NOCTUIDAE) TO SPODOPTERA LITURA MULTIPLE NUCLEAR POLYHEDROSIS VIRUS

  • M.D. Monobrullah (a1) and Masao Nagata (a1)

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