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Biocontrol of Bactrocera oleae (Diptera: Tephritidae) with Metarhizium brunneum and its Extracts
- Yousef, M., Lozano-Tovar, M. D., Garrido-Jurado, I., Quesada-Moraga, E.
- Journal of economic entomology 2013 v.106 no.3 pp. 1118-1125
- Bactrocera oleae, Metarhizium brunneum, adults, aspartate transaminase, biological control, insecticidal properties, integrated pest management, larvae, mortality, puparium, soil treatment, thermal stability
- The susceptibility of preimaginal and adult olive fruit fly, Bactrocera oleae (Gmelin) (Diptera: Tephritidae), to a strain of the mitosporic ascomycete Metarhizium brunneum (Petch) (Hypocreales: Clavicipitaceae) and the insecticidal activity of its crude extract to olive fruit fly adults were investigated. Strain EAMb 09/01-Su caused 60% mortality to B. oleae adults, with average survival time (AST) of 8.8 d. In soil treatments against pupariating third-instar larvae, preimaginal B. oleae mortality reached 82.3%, whereas preimaginal mortality targeting puparia was 33.3%. The crude extract of EAMb 09/01-Su strain caused 80.0% adult mortality when administered per os, with AST of 27.7 h. The crude extract was demonstrated to be quite thermostable and photoresistant. These results indicate that M. brunneum EAMb 09/01-Su strain and its crude extract show potential to be used in an integrated pest management olive fruit fly management strategy targeting both adults and preimaginals.