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 Previous Article

Applied and Environmental Microbiology, December 2001, p. 5859-5861, Vol. 67, No. 12
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.12.5859-5861.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Cyt1Aa from Bacillus thuringiensis subsp. israelensis Is Toxic to the Diamondback Moth, Plutella xylostella, and Synergizes the Activity of Cry1Ac towards a Resistant Strain

Ali H. Sayyed,1 Neil Crickmore,2 and Denis J. Wright1,*

Department of Biological Sciences, Imperial College of Science, Technology and Medicine, Silwood Park, Ascot, Berkshire SL5 7PY,1 and School of Biological Sciences, University of Sussex, Falmer, Brighton, BN1 9QG2, United Kingdom

Received 23 July 2001/Accepted 27 September 2001

The Bacillus thuringiensis subsp. israelensis cytolytic protein Cyt1Aa was found to be toxic to an insecticide-susceptible laboratory population of Plutella xylostella. Cry1Ac-resistant populations of P. xylostella showed various degrees of resistance to Cyt1Aa. Cyt1Aa/Cry1Ac mixtures showed a marked level of synergism in the Cry1Ac-resistant populations.

* Corresponding author. Mailing address: Department of Biological Sciences, Imperial College of Science, Technology and Medicine, Silwood Park, Ascot, Berkshire SL5 7PY, United Kingdom. Phone: 44 207 594 2248. Fax: 44 207 594 2339. E-mail: d.wright{at}bio.ic.ac.uk.

Applied and Environmental Microbiology, December 2001, p. 5859-5861, Vol. 67, No. 12
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.12.5859-5861.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.




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