Abstract
In 1973, Dipel® (Bacillus thuringiensis Berliner) and Sevin® 4 oil (carbaryl) were applied aerially on a dense population of gypsy moths,Lymantria dispar (L.), to evaluate the effect of these biological and chemical insecticides on gypsy moth larvae and adult parasites. Both insecticides provided excellent protection of foliage (29 % average defoliation) and gypsy moth population reduction (99 %). Significantly fewerBrachymeria intermedia (Nees), andApanteles melanoscelus (Ratzeburg),Parasetigena silvestris (Robineau-Desvoidy) andCompsilura concinnata (Meigen) adult parasites were captured in the blocks treated with Sevin 4 oil or Dipel than in the control block during the treatment year and in 1974, respectively.
Résumé
En 1973, du Dipel® (Bacillus thuringiensis Berliner) et du Sevin® 4 huileux (carbaryl) furent appliqués par voie aérienne sur des populations denses deLymantria dispar (L.) pour déterminer l’effet de ces insecticides biologiques et chimiques sur les larves de ce ravageur et sur ses parasites adultes. Les 2 insecticides assurèrent une excellente protection du feuillage (29 % en moyenne de défeuillaison) et une très bonne réduction (99 %) de la population deL. dispar. Les captures d’adultes deBrachymeria intermedia (Nees),Apanteles melanoscelus (Ratzeburg),Parasetigena silvestris (Robineau-Desvoidy) etCompsilura concinnata (Meigen) furent significativement moins nombreuses dans les parcelles traitées au Sevin ou au Dipel que dans les parcelles témoins l’année du traitement et en 1974, respectivement.
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The work herein reported was funded in part by a U.S.D.A. sponsored program entitled “The Expanded Gypsy Moth Research and Application Program” Northeastern Area, State and Private Forestry, Cooperative Agreement 42–160.
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Reardon, R., Metterhouse, W. & Balaam, R. Impact of aerially appliedBacillus thuringiensis and carbaryl on gypsy moth [Lep.: Lymantriidae] and adult parasites. Entomophaga 24, 305–310 (1979). https://doi.org/10.1007/BF02374245
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DOI: https://doi.org/10.1007/BF02374245