Mortality of olive fruit fly pupae in California

Authors: Orsini, Mia¹; Daane, Kent¹; Sime, Karen¹; Nelson, Erik¹

Source: Biocontrol Science and Technology, Volume 17, Number 8, 2007 , pp. 797-807(11)

Publisher: Taylor and Francis Ltd

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Abstract:

Efforts to control the olive fruit fly, Bactrocera oleae (Diptera: Tephritidae), in California have focused on insecticidal baits and biological control by parasitoids, which primarily target the adult and larval stages, respectively. The pupal stage, which occurs in the soil, has largely been overlooked. This study investigated mortality factors for olive fruit fly pupae in California olive orchards, using a combination of exclusion experiments and observation and trapping of potential predators. Results show predation and climatic factors contribute to pupal mortality. Ants (Formicidae) were the most numerous predators observed. Soil-borne pathogens caused no mortality in this study. Potential applications of these results in the development of a sustainable management program are discussed.

Keywords: Olive; Tephritidae; Bactrocera oleae; biological control; mortality factors

Document Type: Research article

DOI: 10.1080/09583150701527359

Affiliations: 1: Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, USA

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