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Bionomics of the pine needle scale (Hemiptera: Diaspididae), an emerging pest in Christmas tree (Pinaceae) plantations in southern Québec, Canada

Published online by Cambridge University Press:  19 September 2018

Jean-Frdéric Guay ,
Amy Bernier-Desmarais ,
Jean-François Doherty  and
Conrad Cloutier
Jean-Frdéric Guay
Affiliation:
Département de biologie, Université Laval, Ville de Québec, Québec, G1V 0A6, Canada
Amy Bernier-Desmarais
Affiliation:
Département de biologie, Université Laval, Ville de Québec, Québec, G1V 0A6, Canada
Jean-François Doherty
Affiliation:
Département de biologie, Université Laval, Ville de Québec, Québec, G1V 0A6, Canada
Conrad Cloutier*
Affiliation:
Département de biologie, Université Laval, Ville de Québec, Québec, G1V 0A6, Canada
*
1Corresponding author (e-mail: conrad.cloutier@bio.ulaval.ca)
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Abstract

The pine needle scale, Chionaspis pinifoliae (Fitch) (Hemiptera: Diaspididae), has the status of an emerging pest in Christmas tree (Pinaceae) plantations in Québec, Canada. The scale is not known to cause any significant damage yet and is not generally monitored by growers. However, it can be an obstacle for exportation to Christmas tree markets where scale insects are strictly regulated. In this study, we describe its life cycle in Christmas tree plantations in southern Québec. We confirm the presence of both parthenogenetic and sexual forms of the scale on Fraser fir Abies fraseri (Pursh) Poiret (Pinaceae) grown as Christmas trees, and of parasitoid and Coccinellidae (Coleoptera) specialists that could contribute to its control.

Résumé

La cochenille des aiguilles du pin Chionaspis pinifoliae (Fitch) (Hemiptera : Diaspididae) ne cause présentement pas de dommage significatif aux arbres de Noël (Pinaceae) au Québec, Canada et porte le statut de ravageur émergent. Non dépistée par la majorité des producteurs, elle pose toutefois un problème pour certaines entreprises à l’exportation vers des marchés extérieurs où ce type de ravageur est strictement réglementé. Nos observations récentes ont permis de décrire son cycle vital en plantation d’arbres de Noël au sud du Québec. Nous avons pu confirmer la présence des formes parthénogénétiques et sexuées de la cochenille sur le sapin Fraser Abies fraseri (Pursh) Poiret (Pinaceae) cultivé comme arbre de Noël, et de parasitoïdes et Coccinellidae (Coleoptera) qui pourraient favoriser son contrôle.

Type
Behaviour & Ecology—Note
Information
The Canadian Entomologist , Volume 150 , Issue 5 , October 2018 , pp. 632 - 636
Copyright
© Entomological Society of Canada 2018 

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