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LABORATORY AND FIELD EVALUATION OF A FAST-ACTING INSECT GROWTH REGULATOR AGAINST THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

Arthur Retnakaran
Arthur Retnakaran
Affiliation:
Forest Pest Management Institute, Canadian Forestry Service, Sault Ste. Marie, Ontario P6A 5M7
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Abstract

UC-62644, a moult-inhibiting insect growth regulator (IGR) belonging to the benzoylphenylureas, had an EC50 of 0.1 to 0.2 ppm in a meridic diet for the 3rd to 6th larval instars of the spruce budworm, Choristoneura fumiferana Clemens. The effects of the IGR were apparent in less than 48 h after ingestion and there was evidence for some contact toxicity. The larvae were unable to discriminate between IGR-treated and untreated diet. Experimental aerial application of the IGR revealed that at <70 g in 4.7 1/ha (1 oz in 0.5 U.S. gal/acre) it effectively controlled spruce budworm populations and afforded foliage protection. These results were comparable with those obtained with Matacil® applied at the recommended rate.

Résumé

L'UC-62644, régulateur de la croissance des insects (RCI) et inhibiteur de la mue qui appartient aux benzoylphénylurées, a une CE50 de 0,1 à 0,2 ppm dans un régime "méridique" (dont certains ingrédients ne sont pas chimiquement définis) à l'égard des larves de la tordeuse des bourgeons de l'épinette (Choristoneura fumiferana Clemens) du 3e au 6e stades. Ses effets se manifestent mois de 48 h après l'ingestion, et on remarque une certaine toxicité de contact. Les larves ne peuvent pas le déceler. Un arrosage aérien expérimental a révélé que moins de 70 g dans 4,7 L/ha (1 on dans 0,5 gai É.-U./ac) du produit peuvent enrayer les populations de tordeuses et protéger le feuillage. Ces résultats sont comparables à ceux qu'a donnés le Matacil® appliqué selon la dose recommandée.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 6 , June 1982 , pp. 523 - 530
Copyright
Copyright © Entomological Society of Canada 1982

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