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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.