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POST-HARVEST RECOVERY OF RHAGOLETIS MENDAX CURRAN (DIPTERA: TEPHRITIDAE) FROM LOWBUSH BLUEBERRY FRUIT1

Published online by Cambridge University Press:  31 May 2012

P.L. Dixon  and
A.D. Knowlton
P.L. Dixon
Affiliation:
Agriculture Canada Research Station, Kentville, Nova Scotia, Canada B4N 1J5
A.D. Knowlton
Affiliation:
Agriculture Canada Research Station, Kentville, Nova Scotia, Canada B4N 1J5
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Abstract

A brown-sugar flotation technique, recovery trays, and fruit dissection, three methods for determining numbers of larvae of Rhagoletis mendax Curran (Diptera: Tephritidae) from lowbush blueberry fruit, were tested at Kentville, Nova Scotia, in 1990. Similar numbers of larvae were detected by each method, with an average of 3.3, 5.2, and 17.3 larvae recovered at low, medium, and high levels of infestation, respectively. Recovery trays require a minimum of labour but results are available only after 2 weeks, and thus they are of no use for rapid determination. For quality or quarantine inspections, brown-sugar flotation should be used.

Résumé

Trois méthodes de récolte des larves de Rhagoletis mendax Curran (Diptères : Téphritidées) dans les fruits de bleuets sauvages, soit par technique de flotaison au sucre brun, par récupération sur plateaux, et par dissection des fruits, ont été évaluées à Kentville, Nouvelle Ecosse, en 1990. Le nombre de larves détectées par chaque méthode fut similaire avec 3,3, 5,2, et 17,3 larvae recueillies à des niveaux d’infestation faible, moyen et élevé, respectivement. La récupération sur plateaux nécessite un minimum de main d’oeuvre mais les résultats ne sont disponible qu’après 2 semaines seulement et donc inutile pour un comptage rapide. Pour les inspections de qualité et de quarantaine, la méthode de flotaison au sucre brun devrait être utilisée.

Type
Articles
Information
The Canadian Entomologist , Volume 126 , Issue 1 , February 1994 , pp. 121 - 123
Copyright
Copyright © Entomological Society of Canada 1994

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