Assessment of the similarity of pear tree beneficial fauna with 43 vegetal species for optimal value of hedgerows as beneficial reservoirs. Abstract -Introduction. As part of pest management practices, those concerning orchard management surroundings are an important objective. Until now this management has been done without any test on a rational basis. This study shows how it is possible to deal with this point. Materials and methods. The entomofauna of 44 woody species including pear trees

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... s studied for 10 months in 1998 by monthly sampling of 30 trees per species. The capture of the entomofauna was carried out by the Fauvel's beating method. Results and discussion. Basic research was carried out on the composition and structure of the canopy communities of leafy trees and of an agrocenosis, the pear orchard. The arthropod community of 43 leafy species was observed. Arthropod stocks were specific. Correlation between the stock of pear beneficial arthropods and some of the 43 tree species sampled was clearly demonstrated. Conclusion. The aim of this study was to point out the role of some plant species in integrated pest management (IPM) practices. Results supply criteria allowing supervision of the choice of tree species in the context of agrosystems. The same approach can be used in many other crops for developing an IPM strategy. France / Pyrus communis / integrated control / insect control / hedging plants / biological control arthropod / environment Mesure de la ressemblance de la faune utile du poirier avec celle de 43 espèces végétales pour optimiser la composition de haies réservoir d'auxiliaires. Jean-François Debras*, Marianne Cousin, René Rieux