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INSECTS ASSOCIATED WITH PURPLE LOOSESTRIFE, LYTHRUM SAUCARIA L., IN SOUTHERN MANITOBA.

Published online by Cambridge University Press:  31 May 2012

Jason K. Diehl ,
N.J. Holliday ,
C.J. Lindgren  and
R.E. Roughley
Jason K. Diehl
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
N.J. Holliday
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
C.J. Lindgren
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
R.E. Roughley
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
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Abstract

In 1994 and 1995 insects were collected from several sites in southern Manitoba, where purple loosestrife, Lythrum salicaria L., is dominant. Collection techniques included the use of trap plants, sweep netting, vacuum sampling, and hand collecting. Insects from 38 families were collected and grouped into four general feeding guilds: herbivores, predators, omnivores, and fungivores. Herbivores that directly fed on L. salicaria included Galerucella nymphaeae Linné (Coleoptera: Chrysomelidae), Myzus lythri (Schrank) (Homoptera: Aphididae), Poecilocapsus lineatus (Fabricius) (Hemiptera: Miridae), Kleidocerys resedae (Panzer) (Hemiptera: Lygaeidae), Ametastegia glabrata (Fallén) (Hymenoptera: Tenthredinidae), Orgyia leucostigma (Smith) (Lepidoptera: Lymantriidae), Lophocampa maculata (Harris) (Lepidoptera: Lymantriidae), Spilosoma virginica (Fabricius) (Lepidoptera: Arctiidae), Simyra henrici (Grote) (Lepidoptera: Noctuidae), Dichomeris ligulella (Hübner) (Lepidoptera: Gelechiidae), Melanchrapicta (Harris) (Lepidoptera: Noctuidae), Hyles galli (Rottenburg) (Lepidoptera: Sphingidae), and Biston betularia cognataria (Gn) (Lepidoptera: Geometridae). These herbivores cannot severely limit the density of purple loosestrife in southern Manitoba and any interactions with the introduced agents should be minimal. The predatory stink bug, Apoecilus bracteatus Fitch (Hemiptera: Pentatomidae), was identified as a potentially important predator of the introduced biological control agents, Galerucella pusilla Duftschmidt and Galerucella calmariensis (L.) (Coleoptera: Chrysomelidae).

Résumé

Des insectes ont été récoltés en plusieurs localités du sud du Manitoba en 1994 et 1995, là où la salicaire, Lythrum salicaria, est abondante. Parmi les techniques de récolte, il faut mentionner l’utilisation de plantes pièges, le battage de la végétation, l’échantillonnage à la pompe aspirante et les récoltes à la main. Des insectes de 38 familles ont été récoltés et regroupés en quatre guildes alimentaires, les herbivores, les prédateurs, les omnivores et les fongivores. Parmi les herbivores qui se nourrissent directement de la salicaire se trouvent Galerucella nymphaeae Linné (Coleptera : Chrysomelidae), Myzus lythri (Schrank) (Homoptera : Aphididae), Poecilocapsus lineatus (Fabricius) (Hemiptera : Miridae), Kleidocerys resedae (Panzer) (Hemiptera : Lygaeidae), Ametastegia glabrata (Fallén) (Hymenoptera : Tenthredinidae), Orgyia leucostigma (Smith) (Lepidoptera : Lymantriidae), Lophocampa maculata (Harris) (Lepidoptera : Lymantriidae), Spilosoma virginica (Fabricius) (Lepidoptera : Arctiidae), Simyra henrici (Grote) (Lepidoptera : Noctuidae), Dichomeris ligulella (Hübner) (Lepidoptera : Gelechiidae), Melanchra picta (Harris) (Lepidoptera : Noctuidae), Hyles galli (Rottenburg) (Lepidoptera : Sphingidae) et Biston betularia cognataria (Gn) (Lepidoptera : Geometridae). Ces herbivores ne peuvent assurer un contrôle important des densités de salicaires au sud du Manitoba et leur interaction avec les agents de lutte introduits devrait être minimale. La punaise Apoecilus bracteus Fitch (Hemiptera : Pentatomidae) pourrait s’avérer un prédateur important des agents de lutte biologique Galerucella pusilla Duftschmidt et G. calmariensis (L.) (Coleoptera : Chrysomelidae) déjà utilisés contre la salicaire.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 129 , Issue 5 , October 1997 , pp. 937 - 948
Copyright
Copyright © Entomological Society of Canada 1997

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