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Sex Ratio of Campoletis Chlorideae Uchida in Response to Helicoverpa Armigera (Hübner) Density

Published online by Cambridge University Press:  19 September 2011

Nikhil Kumar ,
Arvind Kumar  and
C. P. M. Tripathi
Nikhil Kumar
Affiliation:
Laboratory of Entomology, Department of Zoology, University of Gorakhpur, Gorakhpur- 273 009, India
Arvind Kumar
Affiliation:
Laboratory of Entomology, Department of Zoology, University of Gorakhpur, Gorakhpur- 273 009, India
C. P. M. Tripathi
Affiliation:
Laboratory of Entomology, Department of Zoology, University of Gorakhpur, Gorakhpur- 273 009, India
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Abstract

Experiments were conducted to elucidate the effect of host density on sex ratio of parasitoid offspring, using Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) and its endoparasitoid Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae). The sex ratio of Campoletis chlorideae was female-biased showing a linear decrease with increasing parasitoid density at fixed host densities. However, with more hosts available, the number of parasitoids emerging increased, stabilising after a density of 32 hosts per parasitoid. To obtain a female-biased sex ratio, a low density of parasitoids should be released at a recommended site.

Réesumée

Des essais ont été menés pour élucider l'effet de densités de Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) sur le sex-ratio de son endoparasitoïde, Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae). Le sex-ratio de C. chlorideae tendait à être biaisé dans le sens de la production de peu de femelles et montrait leur réduction linaire au fur et à mesure de l'augmentation de la densité des parasitoïdes maintenus sur un nombre constant de l'hôte. Cependant, l'effectif de parasitoïdes éclos augmentait avec la disponibilité du nombre d'hôtes et se stabilisait après que la densité de l'hôte atteignait 32 hôtes par parasitoïde. Dans le but d'obtenir un sex-ratio avec plus de femelles, il serait recommandable de lâcher une petite densité du parasitoïde, sur un site donné.

Keywords

Campoletis chlorideaeHelicoverpa armigerasex ratioparasitoid-host interactionCampoletis chlorideaeHelicoverpa armigerasex-ratiointeraction hôte-parasitoïde
Type
Short Communication
Information
International Journal of Tropical Insect Science , Volume 20 , Issue 1 , March 2000 , pp. 73 - 76
Copyright
Copyright © ICIPE 2000

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References

REFERENCES

Abidi, A. Z., Kumar, A. and Tripathi, C. P. M. (1988) Impact of males on the sex ratio of Diaeretiella rapae (M'Intosh) (Hymenoptera: Aphidiidae), a parasitoidof Lipaphis erysimi Kalt, (Hemiptera: Aphididae). Bull. Inst. Zool. Academia Sinica 27, 205–209.Google Scholar
Ashley, T. R. and Chambers, D. L. (1979) Effects of parasite density and host availability on progeny production by Biosteres (opius) longicaudatus (Hymenoptera: Braconidae), a parasite of Anastrepha suspensa (Diptera: Tephritidae). Entomophaga 24, 363–369.CrossRefGoogle Scholar
Avilla, J. and Albajes, R. (1984) The influence of female age and host size on the sexratio of the parasitoid Opius concolor. Ent. Exp. Appl. 35, 43–47.CrossRefGoogle Scholar
Dransfield, R. D. (1979) Aspects of host-parasitoid interactions of two aphid parasitoids, Aphidius urticae (Haliday) and Aphidius uzbeckistanicus (Luzhetski) (Hymenoptera: Aphidiidae). Ecol. Entomol. 4, 307–316.CrossRefGoogle Scholar
Flanders, S. E. (1962) The parasitic Hymenoptera: Specialists in population regulation. Can. Entomol. 94, 1133–1147.CrossRefGoogle Scholar
Flanders, S. E. (1967) Deviate-ontogenesis in the aphelinid male (Hym.) associated with the ovipositional behaviour of the parental female. Entomophaga 12, 415–427.CrossRefGoogle Scholar
Flanders, S. E. (1969) Alternative differential mortality of the sexes concomitant tosex differentiation in host relations. Entomophaga 14, 335–346.CrossRefGoogle Scholar
Hamilton, P. A. (1974) The biology of Monoctonus pseudoplatani, Trioxys cirsii parasites of the sycamore aphid, Drepanosiphym plantanoides. Ann. Soc. Ent. Er. (N.S.). 10, 821–840.Google Scholar
Hassell, M. P., Waage, J. K. and May, R. M. (1983) Variable parasitoid sex ratios and their effect on host parasitoid dynamics. J. Anim. Ecol. 52, 889–904.CrossRefGoogle Scholar
Hoffmann, R. W. and Kennett, C. E. (1985) Effects of winter temperatures on the sex ratios of Aphytis melinus (Hymenoptera: Aphelinidae) in the San Joaquin Valley of California. Entomophaga 30, 125–132.CrossRefGoogle Scholar
Hu, C., Barbcsa, P. and Martinat, P. (1986) Influence of rearing conditions on the survival and reproduction of Glyptapanteles flavicoxis. J. Appl. Entomol. 101, 525–531.CrossRefGoogle Scholar
Hutchinson, W. D., Butler, G. D. Jr and Martin, J. M. (1986) Age-specific development times for pink bollworm (Lepidoptera: Gelechiidae): Three age classes of eggs, five larval instars, and pupae. Ann. Entomol. Soc. Amer. 79, 482–487.CrossRefGoogle Scholar
Kumar, A. and Tripathi, C. P. M. (1987) Parasitoid-host relationship between Trioxys (Binodoxys) indicus Subba Rao and Sharma (Hymenoptera: Aphidiidae) and Aphis craccivora Koch. (Hemiptera: Aphididae). IV. Effect of host plants on the sex ratio of the parasitoid. Entomon 12, 95–99.Google Scholar
Kumar, A., Tripathi, C. P. M., Singh, R. and Pandey, R. K. (1983) Bionomics of Trioxys (Binodoxys) indicus, an aphidiid parasitoid of Aphis craccivora. 17. Effect of host plants on the activities of the parasitoid. Z. Angew. Entomol. 96, 304–307.CrossRefGoogle Scholar
Kumar, N., Kumar, A. and Tripathi, C. P. M. (1994) Functional response of Campoletis chloridae Uchida (Hymenoptera: Ichneumonidae), a parasitoid of Heliothis armigera (Hébner) (Lepidoptera: Noctuidae) in an enclosed experimental system. Biol. Agric. Hort. 10, 287–295.CrossRefGoogle Scholar
Mackauer, M. (1976) The sex ratio in field population of some aphid parasite. Ann. Entomol. Soc. Amer. 69, 435–456.CrossRefGoogle Scholar
Patel, B. P. and Patel, R. E. (1972) Biology of Ecphoropsis perdistinctis Viereck a larval parasite of Heliothis armigera (HB). J. Anim. Morphol. Physiol. 19, 123–134.Google Scholar
Rabasse, J. M. and Shalaby, F. F. (1980) Laboratory studies on the development of Myzus persicae Sulz. (Homoptera: Aphididae) and its primary parasite, Aphidius matricariae Hal. (Hymenoptera: Aphidiidae) at constant temperatures. Acta Oecologica Oecol. Applic. 1, 21–28.Google Scholar
Sinha, T. B. and Singh, R. (1979) Studies on the bionomics of Trioxys (Binodoxys) indicus (Hym.: Aphidiidae): Effect of population densities on the sex ratio. Entomophaga 24, 289–294.CrossRefGoogle Scholar
Suzuki, Y. and Iwasa, Y. (1980) A sex ratio theory of gregarious parasitoids. Res. Popul. Ecol. 22, 366–382.CrossRefGoogle Scholar
Waage, J. K. (1982) Sex-ratio and population dynamics of natural enemies: Some possible interactions. Ann. Appl. Biol. 101, 159–164.Google Scholar
Waage, J. K. and Sook Ming, N. G. (1984) The reproductive strategies of a parasitic wasp. I. Optimal progeny and sex allocation in Trichogramma evanescens. J. Chem. Ecol. 53, 401–415.Google Scholar