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  • J. Maltais (a1), J. Régnière (a1), C. Cloutier (a1), C. Hébert (a1) and D.F. Perry (a1)...


The braconid parasitoid Meteorus trachynotus Vier. was found in overwintered larvae of the obliquebanded leafroller, Choristoneura rosaceana (Harr.), on foliage of a variety of deciduous species, well before the parasitoid’s attack on the spruce budworm, Choristoneura fumiferana (Clem.). In the spring, percentage parasitism of C. rosaceana by M. trachynotus was 8.0 and 18.8% in 1986 and 1987, respectively. Maximum parasitism on C. fumiferana (35 and 4% in 1986 and 1987, respectively) was reached in late June, at a time when over 50% of M. trachynotus cocoons found on deciduous vegetation had emerged. Twenty days later, parasitoids produced on C. fumiferana reached 50% adult emergence. The catches of adult parasitoids on sticky traps placed on deciduous trees and on conifers showed two periods of adult activity. Based on the sex ratio of captured parasitoids, male M. trachynotus were active at emergence sites, whereas females were found mostly in the habitats of available hosts. The phenology of C. rosaceana was observed in 1987. As indicated by light-trap captures, males fly sooner than females. Eggs were laid in July, and so the early larval stages were available to female M. trachynotus as overwintering hosts. Several parasitoids common to C. rosaceana and C. fumiferana were identified.

Le parasitoïde braconide Meteorus trachynotus Vier. a été retrouvé, dans des larves hivernées de la tordeuse à bandes obliques, Choristoneura rosaceana (Harr.), sur le feuillage de diverses espèces feuillues, bien avant que ne commence l’attaque de la tordeuse des bourgeons de l’épinette, Choristoneura fumiferana (Clem.) par le parasitoïde. Au printemps, le pourcentage de parasitisme dès larves de C. rosaceana par M. trachynotus était de 8,0 et 18,8% en 1986 et 1987, respectivement. Les maxima de parasitisme sur C. fumiferana (35 et 4% en 1986 et 1987, respectivement) ont été atteints à la fin juin, période à laquelle les cocons du parasitoïde trouvés sur les décidus étaient émergées à plus de 50%. Vingt jours plus tard, l’émergence des adultes du parasitoïde issus de C. fumiferana atteignait 50%. Les captures du parasitoïde par des pièges collants disposés sur les feuillus et les conifères ont montré deux périodes d’activité des adultes. Le rapport des sexes dans ces captures a montré que les mâles du parasitoïde étaient actifs aux sites d’émergence des cocons, alors que les femelles étaient retrouvées principalement dans les habitats respectifs des tordeuses recherchées comme hôtes aux différentes périodes. La phénologie de C. rosaceana a été suivie en 1987. La période de vol des adultes de ce tortricide, déterminée à l’aide de pièges lumineux, montre une protandrie prononcée. La période de ponte des femelles a eu lieu pendant le mois de juillet, de sorte que les larves des premiers stades sont exposées aux femelles de M. trachynotus comme hôtes d’hivernement. Plusieurs parasitoïdes communs à C. rosaceana et C. fumiferana ont été identifiés.



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AliNiazee, M.T. 1986. Seasonal history, adult activity and damage of the obliquebanded leafroller, Choristoneura rosaceana (Lepidoptera: Tortricidae), in filbert orchards. Can. Ent. 118: 353361.
Blais, J.R. 1960. Spruce budworm parasite investigations in the lower St-Laurence and Gaspé regions of Quebec. Can. Ent. 92: 384396.
Chapman, P.J., and Lienk, S.E.. 1971. Tortricid fauna of apple in New-York; including an account of apple occurrence in the state, especially as a naturalized plant. N.Y. State Agric. Exp. Stn. (Geneva, N.Y.) Spec. Publ.
Chapman, P.J., Lienk, S.E., and Dean, R.W.. 1968. Bionomics of Choristoneura rosaceana. Ann. ent. Soc. Am. 61: 285290.
Danks, H.V. 1987. Insect Dormancy: An Ecological Perspective. Biological Survey of Canada Monogr. 1. Ottawa. 439 pp.
Daviault, L. 1949. Les parasites de la tordeuse des bourgeons de l'épinette (Choristoneura fumiferana Clem.) dans la province de Québec. Rapp. Soc. Québec Prot. Plantes, 1948–1949. pp. 17.
Dowden, P.B., and Carolin, V.M.. 1950. Natural control factors affecting the spruce budworm in the Adirondacks during 1946–1948. J. econ. Ent. 43: 774783.
Gangavalli, R.R., and AliNiazee, M.T.. 1985. Diapause induction in the obliquebanded leafroller Choristoneura rosaceana (Lepidoptera: Tortricidae): role of photoperiod and temperature. J. Insect Physiol. 31: 831835.
Greenbank, D.O. 1957. The role of climate and dispersal in the initiation of outbreaks of the spruce budworm in New-Brunswick. Can. J. Zool. 35: 385403.
Gujarati, D. 1970. Use of dummy variables in testing for equality between sets of coefficients in linear regressions: a generalisation. Am. Statistician 24: 1822.
Krombein, K.V., Hurd, P.D., Jr., Smith, D.R., and Burks, B.D.. 1979. Catalogue of Hymenoptera in America North of Mexico. Smithsonian Inst. Press, Washington, DC.
Lethiecq, J.-L., and Régnière, J.. 1988. Comparative description of the physical environment and vegetation of sex sites used by the Canadian Forestry Service in the study of spruce budworm population dynamics. Can. For. Serv., Laurentian For. Cent. Inf. Rep. Lau-X-83. 46 pp.
Madsen, H.F., and Madsen, B.J.. 1980. Response of four leafroller species to sex attractants in British Columbia orchards. Can. Ent. 112: 427430.
Madsen, H.F., Vakenti, J.M., and Gaunce, A.P.. 1984. Distribution and flight activity of obliquebanded and threelined leafrollers (Lepidoptera: Tortricidae) in the Okanagan and Similkameen valleys of British Columbia. Can. Ent. 116: 16591664.
Martineau, R. 1985. Insects Harmful to Forest Trees. Can. For. Serv., Ottawa, Ontario. 283 pp.
McGugan, B.M. 1955. Certain host–parasite relationships involving the spruce budworm. Can. Ent. 87: 178187.
McGugan, B.M., and Blais, J.R.. 1959. Spruce budworm parasite studies in northwestern Ontario. Can. Ent. 91: 758783.
McMorran, A. 1965. A synthetic diet for the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae). Can. Ent. 97: 5862.
Miller, C.A. 1963. Parasites and the spruce budworm. pp. 228244in Morris, R.F. (Ed.), The Dynamics of Epidemic Spruce Budworm Populations. Mem. ent. Soc. Can. 31.
Miller, C.A., and Renault, T.R.. 1976. Incidence of parasitoids attacking endemic spruce budworm population in New Brunswick. Can. Ent. 108: 10451052.
Onstad, D.W., Reissig, W.H., and Shoemaker, C.A.. 1985. Phenology and management of the obliquebanded leafroller (Lepidoptera: Tortricidae) in apple orchards. J. econ. Ent. 78: 14551462.
Pogue, M.G. 1985. Parasite complex of Archips argyrospilus, Choristoneura rosaceana (Lepidoptera: Tortricidae) and Anacampsis innocuella (Lepidoptera: Gelechiidae) in Wyoming shelterbelts. Ent. News 96: 8386.
Régnière, J., Lysyk, T., and Auger, M. 1989. Population density estimation of spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae), on balsam fir and white spruce from 45-cm mid-crown branch tips. Can. Ent. 121: 267281.
Roelofs, W., and Hill, A.. 1979. Sex pheromone components of the obliquebanded leafroller. Choristoneura rosaceana. J. Chem. Ecol. 5: 311.
Schmidt, F.H., and Lauer, W.L.. 1977. Developmental polymorphism in Choristoneura spp. Ann. ent. Soc. Am. 70: 112118.
Thomas, A.W. 1984. Individual rearing of spruce budworm. Can. For. Serv. Bi-Mon. Res. Notes 4: 2325.
Thomas, A.W., Borland, S.A., and Greenbank, D.O.. 1980. Field fecundity of the spruce budworm (Lepidoptera: Tortricidae) as determined from regression relationships between egg complement, forewing length and body weight. Can. J. Zool. 58: 16081611.


  • J. Maltais (a1), J. Régnière (a1), C. Cloutier (a1), C. Hébert (a1) and D.F. Perry (a1)...


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