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Cross-resistance between strains of Bacillus sphaericus but not B. thuringiensisisraelensis in colonies of the mosquito Culex quinquefasciatus by Z. M. Yuan; G. F. Pei; L. Regis; C. Nielsen-Leroux; Q. X. Cai is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Cross-resistance between strains of Bacillus sphaericus but not B. thuringiensisisraelensis in colonies of the mosquito Culex quinquefasciatus about?

**Abstract.** Two colonies of __Culex quinquefasciatus__ Say (Diptera: Culicidae) were selected with __Bacillus sphaericus__ strains C3‐41 and IAB59 in the laboratory for 13 and 18 generations; they attained 145 000‐ and 48.3‐fold resistance, respectively, in comparison with a susceptible laboratory colony (SLCq) and showed very high levels of cross‐resistance (8500‐ to 145 000‐fold) to __B. sphaericus__ strains C3‐41, 1593, 2297 and 2362. They were relatively susceptible to __B. sphaericus__ strains LP1‐G and 47‐6B (only 0.8‐ to 2.8‐fold tolerance), with 24.8‐ to 48.3‐fold cross‐resistance to strain IAB59. __B. sphaericus__‐resistant mosquito colonies remained highly susceptible to __B. thuringiensis____israelensis__, suggesting that __B.t.i.__ would be of value in the management of __B. sphaericus__‐resistant __Cx. quinquefasciatus__ colonies. The demonstration of low or no cross‐resistance of two selected resistant __Cx. quinquefasciatus__ colonies to IAB59, LP1‐G and 47‐6B strains of __B. sphaericus__ and the finding of a major 49 kDa protein in these strains suggest that there is likely to be another mosquitocidal factor in the three strains.

Who reads Cross-resistance between strains of Bacillus sphaericus but not B. thuringiensisisraelensis in colonies of the mosquito Culex quinquefasciatus?

Author

Z. M. Yuan; G. F. Pei; L. Regis; C. Nielsen-Leroux; Q. X. Cai

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0269-283X)

Published

2003

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)