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Titre :
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Prevalence of Predators Associated with Acyrthosiphon pisum (Homoptera, Aphididae) and Hypera postica Gyllenhal (Coleoptera, Curculionidae) During Growth of the 1 st Crop of Alfalfa
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Auteurs :
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K. Giles ;
J. Obrycki ;
T. Degooyer
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Type de document :
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article/chapitre/communication
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Année de publication :
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1994
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Format :
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170-177
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Langues:
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= Anglais
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Mots-clés:
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Hypera-Postica
;
Insect Predators
;
Coleomegilla-Maculata
;
Predateur
;
Dynamique des populations
;
Inventaire faunistique
;
Comptage
;
Acyrthosiphon pisum
;
Aphididae
;
Hypera postica
;
Curculionidae
;
Collomegilla maculata
;
Coccinellidae
;
Medicago sativa
;
Leguminosae
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Résumé :
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In 1991 and 1992, Coleomegilla maculata Timberlake adults (Coleoptera: Coccinellidae) were the most abundant predators prior to first cutting in alfalfa (Medicago sativa L.) from 16 April to 7 June at four locations in Iowa. Relative populations of C. maculata adults peaked in 1992 at more than one per sweep (38 cm diameter sweepnet) in Polk County on 15 May. In 1991 and 1992, densities of C. maculata adults were highly correlated (P
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Source :
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Biological Control - 1049-9644, vol. 4, n° 2
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