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Effect of 20 Strains of Bacillus thuringiensis Berliner on Larvae of Boarmia selenaria Schiffermüller (Lepidoptera: Geometridae)

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Abstract

Twenty isolates of Bacillus thuringiensis Berliner belonging to vars. kenyae, kurstaki, aizawai and ostriniae, were tested for their activity against first instar larvae of Boarmia selenaria Schiffermüller. Isolate 30-11 (serovar 3a3b, kurstaki) proved to be 8% more effective than the standard HD-1-S-1980 (serovar 3a3b, kurstaki). This isolate was 13% more larvicidal to third instar larvae than the standard. Significant lower mortalities than the standard were obtained with the isolates: 400-1, 400-2, 400-3, 400-4, 400-8, 400-11, 400-12, 400-14, 30-2, 30-12, 30-13, 30-15, Ser. 17 and BL8a8c. Isolates 400-5, 400-6, 400-7, 400-9 and 400-10 were similar in larvicidal effectiveness to the standard.

Résumé

Vingt souches de Bacillus thuringiensis Berliner qui appartiennent aux variétés: kenyae, kurstaki, aizawai et ostriniae, ont été testées pour leur activité contre le prémier stade de la larve de Boarmia selenaria Schiffermüller. La souche 30-11 (sérovar 3a3b, kurstaki) s’est avérée être 8% plus effective que le standard HD-1-S-1980 (sérovar 3a3b, kurstaki). Cette souche a été de 13% plus larvicide pour le troisième stade des larves que le standard. Les souches 400-1, 400-2, 400-3, 400-4, 400-8, 400-11, 400-12, 400-14, 30-2, 30-12, 30-13, 30-15, Ser.17 et BL8a8c prouvaient une baisse de mortalité obtenue par rapport au standard. L’effectivité comparable au standard étant de: 400-5, 400-6, 400-7, 400-9 et 400-10.

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Authors and Affiliations

  1. Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, Bet Dagan, 50-250, Israel

    M. Wysoki & M. H. M. Scheepens

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  1. M. Wysoki
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  2. M. H. M. Scheepens
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Wysoki, M., Scheepens, M.H.M. Effect of 20 Strains of Bacillus thuringiensis Berliner on Larvae of Boarmia selenaria Schiffermüller (Lepidoptera: Geometridae). Int J Trop Insect Sci 9, 433–436 (1988). https://doi.org/10.1017/S1742758400010912

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  • DOI: https://doi.org/10.1017/S1742758400010912

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