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TRIPHELIO Résumé de rapport

Project ID: ICA4-CT-2001-10004
Financé au titre de: FP5-INCO 2
Pays: Germany

An inventory of local Trichogramma egg parasitoids of the olive grove ecosystem for use in biological control in the Mediterranean region

Field collections of native egg parasitoids of the genus Trichogramma were done by host egg exposure in several olive groves. The following species were recorded: T. cacoeciae, T. sp. nr. nerudai in Portugal; T. oleae, T. cacoeciae and T. bourarachae in Tunisia; T. cacoeciae in Greece; T. bourarachae, T. euproctidis and T. cordubensis in Egypt. Suitable strains/species were selected in laboratory tests by considering their host preference; efficacy in searching target host eggs on olive foliage and tolerance to heat. Strains that were collected from olive groves were superior to those collected elsewhere, confirming the assumption that biological control agents should preferably be isolated from the relevant pest-crop system.

The Mediterranean species T. cordubensis and T. bourarachae showed particular potential to be used in biocontrol programmes in this region. The use of indigenous Trichogramma-strains for biocontrol has the added advantage of following recommendations made by the EPPO (European and Mediterranean Plant Protection Organization) on "Safe use of biological control" (EPPO 2002). The species T. bourarachae and T. cordubensis are typical species of the Mediterranean region and our results encourage further testing of these species also for use in other biocontrol programmes.

Reported by

Biologische Bundesanstalt fur Land- und Forstwirtschaft
Schwabenheimer Str. 101
69221 Dossenheim
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