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Applied and Environmental Microbiology, February 2003, p. 1331-1334, Vol. 69, No. 2
0099-2240/03/$08.00+0 DOI: 10.1128/AEM.69.2.1331-1334.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
Department of Entomology,1 Interdepartmental Graduate Programs in Genetics and Microbiology, University of California, Riverside, California 925212
Received 19 August 2002/ Accepted 5 November 2002
A novel recombinant Bacillus thuringiensis subsp. israelensis strain that produces the B. sphaericus binary toxin, Cyt1Aa, and Cry11Ba is described. The toxicity of this strain (50% lethal concentration [LC50] = 1.7 ng/ml) against fourth-instar Culex quinquefasciatus was higher than that of B. thuringiensis subsp. israelensis IPS-82 (LC50 = 7.9 ng/ml) or B. sphaericus 2362 (LC50 = 12.6 ng/ml).
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