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SUSCEPTIBILITY OF EARLY INSTARS OF SPRUCE BUDWORM (LEPIDOPTERA: TORTRICIDAE) TO HETERORHABDITIS HELIOTHIDIS (NEMATODA: RHABDITIDAE)

Published online by Cambridge University Press:  31 May 2012

Jean R. Finney  and
Gordon F. Bennett
Jean R. Finney
Affiliation:
Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X9
Gordon F. Bennett
Affiliation:
Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X9
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Extract

Finney et al. (1982) reported on the susceptibility of the 4th to 6th larval instars and pupae of Choristoneura fumiferana (Clemens) to Heterorhabditis heliothidis (Khan, Brooks and Hirschmann). This report describes the susceptibility of the first three larval instars to the nematode. First-instar larvae search for suitable sites where they spin hibernacula in which they molt and overwinter as second-instar larvae. Most third-instar larvae burrow within the balsam fir buds. All these stages occupy cryptic habitats to which delivery of chemical pesticides is a problem. Rhabditid nematodes, which can actively seek out a target insect, may prove a more useful control agent under these circumstances.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 2 , February 1984 , pp. 285 - 287
Copyright
Copyright © Entomological Society of Canada 1984

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References

Finney, J. R., Lim, K. P., and Bennett, G. F.. 1982. The susceptibility of the spruce budworm, Choristoneura fumiferana (Lepidoptera: Tortricidae) to Heterorhabditis heliothidis (Nematoda: Heterorhabditidae) in the laboratory. Can. J. Zool. 60: 958–961.CrossRefGoogle Scholar