Ecological Entomology (2001) 26, 502-508

Ali H. Sayyed and Denis J. Wright (2001)
Fitness costs and stability of resistance to Bacillus thuringiensis in a field population of the diamondback moth Plutella xylostella L.
Ecological Entomology 26 (5), 502-508
Abstract: 1. The stability of resistance to Bacillus thuringiensis Crystal (Cry) toxins in highly and moderately resistant sub-populations of a Plutella xylostella field population (SERD4) was compared under laboratory conditions. The relative rate of decrease in resistance was greater in a highly resistant Cry1Ac-selected population than in moderately resistant Cry1Ab- and Cry1Ca-selected populations.
2. The intrinsic rate of population increase (r_m) was similar in all populations tested.
3. These results suggest that there are no obvious overall fitness benefits as the frequency of the resistance alleles is reduced.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Ali H. Sayyed, Denis J. Wright

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
pesticide resistance of pest
Research topic(s) for beneficials or antagonists:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella
Bacillus thuringiensis Cry1A-toxin (entomopathogen)	Plutella xylostella
Bacillus thuringiensis Cry1C-toxin (entomopathogen)	Plutella xylostella