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

Published online by Cambridge University Press:  19 September 2011

M. Wysoki  and
M. H. M. Scheepens
M. Wysoki
Affiliation:
Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, Bet Dagan 50-250, Israel
M. H. M. Scheepens
Affiliation:
Department of Entomology, Institute of Plant Protection, Agricultural Research Organization, Bet Dagan 50-250, Israel
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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-l-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-l-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.

Keywords

Boarmia selenariaBacillus thuringiensis v. kenyaekurstakiaizawaiostriniaebioassay
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 4 , August 1988 , pp. 433 - 436
Copyright
Copyright © ICIPE 1988

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