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AN IMPROVED METHOD FOR REARING AXENIC MOUNTAIN PINE BEETLES, DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE)

Published online by Cambridge University Press:  31 May 2012

H. S. Whitney  and
O. J. Spanier
H. S. Whitney
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia VSZ 1M5
O. J. Spanier
Affiliation:
Pacific Forest Research Centre, Canadian Forestry Service, Victoria, British Columbia VSZ 1M5
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Abstract

Improvements in the rearing methods for axenic mountain pine beetles were made by standardizing the nutritional and physical composition of a yeast-fortified ground phloem diet. By eliminating handling and possible malnutrition of neonate larvae, and by use of individual rearing units to reduce hazards associated with microbial contamination, one person produced batches of 400–500 axenic beetles. Beetles produced by this method were morphologically and anatomically equivalent to and more fecund than field beetles, were significantly smaller than their parental stocks, and perhaps required more degree hours above 40 °C in developing from egg to adult.

Résumé

On a amélioré les méthodes d'élevage axénique du dendroctone du pin ponderosa en normalisant la composition nutritive et physique d'un régime composé de phloème moulu enrichi de levure, en éliminant la manipulation et la malnutrition. possible des larves après l'éclosion et en utilisant des cellules individuelles d'élevage pour réduire les dangers associés à la contamination microbienne. Une seule personne a pu s'occuper de faire produire des lots de 400 à 500 dendroctones axéniques. Les insectes axéniques produits par cette méthode possédaient une anatomie et une morphologie équivalent aux souches aborigènes et étaient peutêtre plus féconds. Ils étaient significativement plus petits que leurs parents, et leur développement à partir de l'oeuf jusqu'à l'adulte a demandé peut-être davantage de degrés-heures supérieurs à 40 °C.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 11 , November 1982 , pp. 1095 - 1100
Copyright
Copyright © Entomological Society of Canada 1982

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