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LIFE HISTORY OF PLUTELLA PORRECTELLA, A RELATIVE OF THE DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA (LEPIDOPTERA: PLUTELLIDAE)

Published online by Cambridge University Press:  31 May 2012

D. B. Smith  and
M. K. Sears
D. B. Smith
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1
M. K. Sears
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1
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Abstract

Although Plutella porrectella (L.) is similar in appearance to the diamondback moth, P. xylostella (L.), several aspects of its biology are quite different from its more common relative. P. porrectella completed two generations per year and overwintered as an early-instar larva within apical buds of dame's rocket, Hesperis matronalis (L.). Four instars were observed in larvae reared in the laboratory. An average of 30 days was required for completion of one generation at 25 °C. This species does not seem to be an alternative host for parasites of the diamondback moth as only a single parasitic wasp, Itoplectis conquisitor (Say), was reared from 228 larvae collected in the field.

Résumé

Quoique Plutella porrectella (L.) est similaire en apparence à la fausse-teigne des crucifères, P. xylostella (L.), plusieurs aspects de sa biologie sont très différents de ceux de la fausse-teigne plus commune. P. porrectella a complété 2 générations par an et hiverné à l'état de premier stade larvaire à l'intérieur des bourgeons apicaux de la Julienne des Dames, Hesperis matronalis (L.). Quatre stades ont pu être observés chez des larves élevées au laboratoire. Une moyenne de 30 jours ont été nécessaires pour compléter une génération à 25 °C. Cette espèce ne semble pas être un hôte alternatif pour les parasites de la fausse-teigne, car une seule espèce, Itoplectis conquisitor (Say), a été obtenue à partir de 228 larves prélevées sur le terrain.

Type
Articles
Information
The Canadian Entomologist , Volume 116 , Issue 7 , July 1984 , pp. 913 - 917
Copyright
Copyright © Entomological Society of Canada 1984

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References

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