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

  • Jean-Frdéric Guay (a1), Amy Bernier-Desmarais (a1), Jean-François Doherty (a1) and Conrad Cloutier (a1)
  • Please note a correction has been issued for this article.

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.

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.

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Corresponding author

1Corresponding author (e-mail: conrad.cloutier@bio.ulaval.ca)

References

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