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HORMONAL INDUCTION OF SUPERNUMERARY INSTARS IN THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)1

Published online by Cambridge University Press:  31 May 2012

Arthur Retnakaran
Arthur Retnakaran
Affiliation:
Insect Pathology Research Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario
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Abstract

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Induction of supernumerary larval instars in the spruce budworm, Choristoneura fumiferana Clemens, by applying ZR-515, a potent juvenile hormone analogue, is explained in terms of larval differentiation. Application to the early sixth instar where structures are relatively indeterminate results in the formation of a supernumerary larval instar, whereas treatment of the late-larva wherein many structures are committed to differentiate towards the pupa, results in a larval–pupal mosaic.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 3 , March 1973 , pp. 459 - 461
Copyright
Copyright © Entomological Society of Canada 1973

References

Grisdale, D. 1970. An improved laboratory method for rearing large numbers of spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae). Can. Ent. 102: 1111–1117.Google Scholar
Imms, A. D. 1960. A general textbook of entomology. Methuen, London and New York. p. 230.Google Scholar
McMorran, A. 1965. A synthetic diet for the spruce budworm, Choristoneura fumiferana (Clem.) (Lepidoptera: Tortricidae). Can. Ent. 97: 58–62.Google Scholar
Novak, V. J. A. 1966. Insect hormones. Methuen, London. 478 pp.Google Scholar
Retnakaran, A. and Grisdale, D.. 1970. The ovicidal effect of the hydrochlorination reaction mixture on the spruce budworm, Choristoneura fumiferana Clemens. J. econ. Ent. 63: 907–909.Google Scholar
Schneiderman, H. A. and Gilbert, L. I.. 1964. Control of growth and development in insects. Science 143: 325–333.Google Scholar
Wilde, J. de, de Kort, C. A. D., and de Loof, A.. 1971. The significance of juvenile hormone titers. Mitt. schweiz. ent. Ges. (Bull. Soc. ent. Suisse) 44: 79–86.Google Scholar
Williams, C. M. and Kafatos, F. C.. 1971. Theoretical aspects of the action of juvenile hormone. Mitt. schweiz. ent. Ges. (Bull. Soc. ent. Suisse) 44: 151–162.Google Scholar
Wyatt, G. R. 1972. Insect hormones. pp. 385–490. In Litwack, G. (Ed.), Biochemical actions of hormones, Vol. II. Academic Press, New York.CrossRefGoogle Scholar