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TRIPHELIO Informe resumido

Project ID: ICA4-CT-2001-10004
Financiado con arreglo a: FP5-INCO 2
País: Egypt

Application technique for Trichogramma in the olive grove ecosystem

Indundative releases of mass-reared Trichogramma-wasps were performed in Portugal, Tunisia, Greece and Egypt. Two to three releases were usually carried out during the anthophagous and during the carpophagous generation of the olive moth in Portugal, Greece and Tunisia. In Egypt, up to 10 releases were performed from early spring on due to the permanent presence of the jasmine moth. Best results were obtained by several releases of 9000 wasps/tree in two-weekly intervals in the olive plantation in Egypt, using native Trichogramma-strains. Ant predation on releasing units revealed to be a major factor impeding successful release.

Further research effort is needed to improve releasing devices and to define the essential doses of wasps in order to reduce costs of the application. After optimisation, the inundative release of mass-reared Trichogramma can be an effective tool for biological control of the carpophagous generation of the olive moth, which can currently be treated only by insecticides. The jasmine moth is a secondary pest with increasing importance, especially in new olive plantations with artificial irrigation. Releases of Trichogramma in such biotopes may help to suppress the jasmine moth population to tolerable levels.

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