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PREDATION BY PODISUS MACULIVENTRIS (SAY) ON MEXICAN BEAN BEETLE, EPILACHNA VARIVESTIS MULSANT, IN INDIANA SOYBEANS1

Published online by Cambridge University Press:  31 May 2012

Robert J. O’Neil
Robert J. O’Neil
Affiliation:
Department of Entomology, Purdue University, West Lafayette, Indiana, USA47907
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Abstract

Daily rates of predation by Podisus maculiventris (Say) (Heteroptera: Pentatomidae) on Mexican bean beetle larvae, Epilachna varivestis Mulsant (Coleoptera: Coccinellidae), were measured in soybeans, Glycine max (L.). The number of Mexican bean beetle larvae attacked per predator per day remained consistently low throughout 2 years of study. Estimates of the area searched by P. maculiventris were calculated from the number of prey attacked, number of prey available for attack, and leaf area. As leaf area increased, P. maculiventris searched more area, demonstrating a search strategy shared with other predators of canopy-inhabiting prey in soybeans.

Résumé

Le taux journalier de prédation par Podisus maculiventris (Say) (Heteroptera : Pentatomidae) sur les larves du coléopteré mexicain du soja, Epilachna varivestis Mulsant (Coleoptera : Coccinellidae) a été estimé en culture de soja, Glycine max (L.). Le nombre de larves du coléopteré attaqué par le predateur par jour est resté constamment bas au cours du 3 annuels d’étude. Les estimations de la superficie exploré par P. maculiventris ont été faites du taux d’attaque proportionnel et de la suface foliaire. Plus la surface foliaire augmente, P. maculiventris explore plus de superficie, démontrant une stratégie d’exploration commune aux autres prédateurs visant dans la canopie du soja.

Type
Articles
Information
The Canadian Entomologist , Volume 120 , Issue 2 , February 1988 , pp. 161 - 166
Copyright
Copyright © Entomological Society of Canada 1988

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