Characteristics of Resistance to Bacillus thuringiensis Toxin Cry2Ab in a Strain of Helicoverpa punctigera (Lepidoptera: Noctuidae) Isolated From a Field Population

2010 ◽  
Vol 103 (6) ◽  
pp. 2147-2154 ◽  
Author(s):  
S. Downes ◽  
T. L. Parker ◽  
R. J. Mahon
Keyword(s):  
Bacillus Thuringiensis ◽  
Field Population ◽  
Bacillus Thuringiensis Toxin ◽  
Lepidoptera Noctuidae

scholarly journals Frequency of Resistance to Bacillus thuringiensis Toxin Cry1Ab in Greek and Spanish Population of Sesamia nonagrioides (Lepidoptera: Noctuidae)

2007 ◽  
Vol 100 (1) ◽  
pp. 195-201 ◽  
Author(s):  
S. S. Andreadis ◽  
F. Álvarez-Alfageme ◽  
I. Sánchez-Ramos ◽  
T. J. Stodola ◽  
D. A. Andow ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Spanish Population ◽  
Sesamia Nonagrioides ◽  
Bacillus Thuringiensis Toxin ◽  
Lepidoptera Noctuidae

scholarly journals Cross-Resistance and Stability of Resistance to Bacillus thuringiensis Toxin Cry1C in Diamondback Moth

2001 ◽  
Vol 67 (7) ◽  
pp. 3216-3219 ◽  
Author(s):  
Yong-Biao Liu ◽  
Bruce E. Tabashnik ◽  
Susan K. Meyer ◽  
Neil Crickmore
Keyword(s):  
Bacillus Thuringiensis ◽  
Plutella Xylostella ◽  
Resistant Strain ◽  
Diamondback Moth ◽  
Field Population ◽  
Cross Resistance ◽  
Bacillus Thuringiensis Toxin ◽  
Stability Of Resistance ◽  
Resistant Strains ◽  
Reported Data

ABSTRACT We tested toxins of Bacillus thuringiensis against larvae from susceptible, Cry1C-resistant, and Cry1A-resistant strains of diamondback moth (Plutella xylostella). The Cry1C-resistant strain, which was derived from a field population that had evolved resistance to B. thuringiensis subsp.kurstaki and B. thuringiensis subsp.aizawai, was selected repeatedly with Cry1C in the laboratory. The Cry1C-resistant strain had strong cross-resistance to Cry1Ab, Cry1Ac, and Cry1F, low to moderate cross-resistance to Cry1Aa and Cry9Ca, and no cross-resistance to Cry1Bb, Cry1Ja, and Cry2A. Resistance to Cry1C declined when selection was relaxed. Together with previously reported data, the new data on the cross-resistance of a Cry1C-resistant strain reported here suggest that resistance to Cry1A and Cry1C toxins confers little or no cross-resistance to Cry1Bb, Cry2Aa, or Cry9Ca. Therefore, these toxins might be useful in rotations or combinations with Cry1A and Cry1C toxins. Cry9Ca was much more potent than Cry1Bb or Cry2Aa and thus might be especially useful against diamondback moth.

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