Insecticidal Activity of <i>Bacillus thuringiensis</i> on Larvae and Adults of <i>Bactrocera oleae Gmelin</i> (Diptera:Tephritidae) — Oak Academic Publishing
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Insecticidal Activity of <i>Bacillus thuringiensis</i> on Larvae and Adults of <i>Bactrocera oleae Gmelin</i> (Diptera:Tephritidae)
Laboratory of Ecology and Management of Natural Ecosystems, Tlemcen University, Tlemcen, Algeria
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Laboratory of Ecology and Management of Natural Ecosystems, Tlemcen University, Tlemcen, Algeria
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Laboratory of Ecology and Management of Natural Ecosystems, Tlemcen University, Tlemcen, Algeria
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Faculty of Science, Saint- Joseph University, Beirut, Lebanon
1 Laboratory of Ecology and Management of Natural Ecosystems, Tlemcen University, Tlemcen, Algeria
2 Laboratory of Ecology and Management of Natural Ecosystems, Tlemcen University, Tlemcen, Algeria
3 Laboratory of Ecology and Management of Natural Ecosystems, Tlemcen University, Tlemcen, Algeria
4 Faculty of Science, Saint- Joseph University, Beirut, Lebanon
The olive fruit fly Bactrocera oleae is a major olive pest in Algeriaand other Mediterranean countries. Its attacks, in some cases, seriously compromised production. Bacillus thuringiensis is a spore-forming soil bacterium which produces a protein crystal toxic to some insects. The objective of this study was to search for isolates toxic to larvae and adults of B. oleae . Four doses test w ere performed on neonate larvae, second instar larvae and third instar larvae. Seven Bt strains examined, showed highest toxicity levels against adults. 86% mortality was observed against neonate larvae after 7 days of application by Bt toxin isolate. The mortality of the second instar larvae was 65% mortality at dose of 10 8 UFC/mL. The third instar larvae w as very susceptible to Bt strain with 70% of mortality. This study demonstrated that some local Algerian B. thuringiensis isolates exhibit toxic potential that could be used to control B . oleae .
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