|PICKETT, C. H.|
Submitted to: International Symposium on Biological Control of Arthropods
Publication Type: Proceedings
Publication Acceptance Date: 2/14/2005
Publication Date: 9/12/2005
Citation: Daane, K., Nadel, H., Sime, K., Andrews, J., Pickett, C., Messing, R., Hoelmer, K.A., Johnson, M., Walton, V., Kirk, A. 2005. Biological control of olive fly: balancing parasitoid effectiveness against non-target impacts. International Symposium on Biological Control of Arthropods. p. 91-92.
Technical Abstract: Olive fly, Bactrocera oleae (Diptera: Tephritidae), has become an important pest of California olives, and is the target of a classical biological control program. We report here on the pre-release screening of imported parasitoids Hymenoptera:Braconidae), conducted in the University of California Berkeley Quarantine Facility. Tested material included Psyttalia concolor (Szepligeti) "Tunisia strain," Diachasmimorpha kraussii (Fullaway), and D. longicaudata (Ashmead), known generalist parasitoids that were originally derived from insectary colonies using the Mediterranean fruitfly as host material. We also studied six suspected olive fly specialists, which were originally reared from olive that were field collected in Africa or Pakistan. These are: Bracon celer Szepligeti, Psyttalia concolor "Kenya strain," Psyttalia lounsburyi, Psyttalia sp. near concolor "South Africa strain," Utetes africanus (Szepligeti) , and Psyttalia ponerophaga. All species tested attacked olive fly and several species of non-target tephritids, except U. africanus and P. lounsburyi. Of these two, P. lounsburyi was more effective in attacking olive fly during the preliminary screenings, and further field testing will be conducted with this species.