Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-23T20:28:08.869Z Has data issue: false hasContentIssue false
  • English
  • Français

A dosing technique and the effects of sub-lethal doses of Nosema fumiferanae (Microsporida) on its host the spruce budworm, Choristoneura fumiferana

Published online by Cambridge University Press:  06 April 2009

G. G. Wilson
G. G. Wilson
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Environment Canada, P.O. Box 490, Sault Ste. Marie, Ontario, CanadaP6A 5M7
Get access Rights & Permissions [Opens in a new window]

Summary

Various dosages of the microsporidian parasite, Nosema fumiferanae were fed to 12-day-old larvae of Choristoneura fumiferana using a previously undescribed bioassay capsule. A spore dose of 3 × 104 resulted in 92% infection and a significant reduction in pupal weights, adult female longevity and a mean spore concentration of 1·5 × 107/living adult. Significant mortality (68%, combined larvae and pupae) did not occur until larvae ingested 3 × 107 spores; this dose produced a mean of 1·8 × 107 spores in dead larvae and 3·6 × 107 and 4·6 × 107 spores in dead male and female pupae respectively.

Type
Research Article
Information
Parasitology , Volume 87 , Issue 3 , December 1983 , pp. 371 - 376
Copyright
Copyright © Cambridge University Press 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Cantwell, G. E. (1970). Standard methods for counting Nosema spores. American Bee Journal 95, 52–3.Google Scholar
Gaugler, R. R. & Brooks, W. M. (1975). Sublethal effects of infection by Nosema heliothidis in the corn earworm, Heliothis zea. Journal of Invertebrate Pathology 26, 57–63.CrossRefGoogle Scholar
Grisdale, D. (1973). Large volume preparation and processing of a synthetic diet for insect rearing. The Canadian Entomologist 105, 1553–7.CrossRefGoogle Scholar
Malone, L. A. & Wigley, P. J. (1981). Quantitative studies on the pathogenicity of Nosema carpocapsae, a microsporidian pathogen of the codling moth, Cydia pomonella, in New Zealand. Journal of Invertebrate Pathology 38, 330–4.CrossRefGoogle Scholar
Moore, A. & Morris, O. N. (1982). An improved technique for dosing larvae of the spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae) with measured quantities of Bacillus thuringiensis var. kurstaki. The Canadian Entomologist 114, 89–91.CrossRefGoogle Scholar
Thomson, H. M. (1958). The effect of a microsporidian parasite on the development, reproduction, and mortality of the spruce budworm, Choristoneura fumiferana (Clem.). Canadian Journal of Zoology 36, 499–511.CrossRefGoogle Scholar
Wilson, G. G. (1974). Effects of larval age at inoculation, and dosage of microsporidian (Nosema fumiferanae) spores, on mortality of spruce budworm (Choristoneura fumiferana). Canadian Journal of Zoology 52, 993–6.CrossRefGoogle Scholar
Wilson, G. G. (1977). The effects of feeding microsporidian (Nosema fumiferanae) spores to naturally infected spruce budworm (Choristoneura fumiferana). Canadian Journal of Zoology 55, 249–50.CrossRefGoogle Scholar
Windels, M. B., Chiang, H. C. & Furgala, B. (1976). Effects of Nosema pyrausta on pupa and adult stages of the European corn borer Ostrinia nubilalis. Journal of Invertebrate Pathology 27, 239–42.CrossRefGoogle Scholar