Parasitism of Diachasmimorpha tryoni (Hymenoptera: Braconidae) on the host Ceratitis capitata (Diptera: Tephritidae) under Mediterranean temperatures
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Cita bibliográficaGarzón-Luque, E., Beitia, F., & Falcó, J. V. (2008). Parasitism of Diachasmimorpha tryoni (Hymenoptera: Braconidae) on the host Ceratitis capitata (Diptera: Tephritidae) under Mediterranean temperatures. IOBC/WPRS Bulletin, 38, 125-129.
Ceratitis capitata (Wiedemann, 1824) is an endemic citrus pest since the 1930s in the East Coast of Spain, where biological control against the medfly was attempted in those first years without any success. In 2003 the Valencian Institute of Agricultural Research (IVIA) began a project to study new possibilities of use of Hymenoptera parasitoids in order to include them in Integrated Pest Management strategies against the Medfly in the Mediterranean Coast of Spain. With this aim the braconid wasp Diachasmimorpha tryoni (Cameron, 1911) was imported from Hawaii and a laboratory rearing of this species is in progress in the IVIA facilities. D. tryoni has a high parasitism and emergence rates at 25°C and at 21-25°C. The critical temperature of 30°C prevents the emergence of a new generation of parasitoids, but females are able to parasitize the host. When these high temperatures (25-30°C) are applied only for a few hours the parasitoid development is completed and adult emergence occurs. These results can explain the potential adaptability and survivorship of the parasitoid in the Mediterranean high temperatures when field releases are carried out to control the Medfly summer populations. Consequently, parasitism can be successful in the warmer months of the Mediterranean Spanish area.