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Diachasmimorpha longicaudata and D. kraussii (Hymenoptera: Braconidae), potential parasitoids of the olive fruit fly

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Abstract:

The olive fruit fly, Bactrocera oleae (Tephritidae), is a significant threat to California's olive industry. As part of a classical biological control program started in 2002, the parasitoids Diachasmimorpha kraussii and D. longicaudata (Hymenoptera: Braconidae) were imported to California from laboratory colonies in Hawaii. Studies on their biology and behavior as parasitoids of the olive fruit fly were conducted in quarantine. Both species tend to oviposit into 2nd and young 3rd instars, with the offspring completing development in the flies' puparia. Most eggs are deposited in the first two weeks of adult life. Observed lifetime fecundity was low, possibly as a consequence of the relatively poor quality of the harvested olives used as a host substrate. Both pre-imaginal development and adult longevity were limited at constant temperatures above 30°C, which may indicate that these species will have difficulty establishing in the warmest regions of California.

Keywords: Braconidae; Tephritidae; biological control; olive; parasitoid biology

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/09583150500188445

Affiliations: 1: Division of Insect Biology and Center for Biological Control, University of California, Berkeley, CA, USA 2: Department of Entomology, University of California, Riverside, CA, USA 3: University of HawaiiKauai Agricultural Research Center, Kauai, USA 4: California Department of Food and Agriculture, Biological Control Program, Sacramento, CA, USA

Publication date: January 1, 2006

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