Table 1 Toxicity of Cry1Ac to pink bollworm larvae from resistant strain AQ189, susceptible strain APHIS-S, and their hybrid F1 progeny.

From: Cadherin repeat 5 mutation associated with Bt resistance in a field-derived strain of pink bollworm

Strain

Slope (SE)a

LC50 (95% FL)b

RRc

APHIS-S

2.9 (0.3)

0.104 (0.089–0.12)

 

AQ189

3.0 (0.6)

24.6 (20–30)

237

AQ189♀ × APHIS-S♂

2.0 (0.2)

0.446 (0.22–0.80)

4.3

AQ189♂ × APHIS-S♀

2.5 (0.3)

0.632 (0.42–0.94)

6.1

  1. aSlope of the concentration-mortality line with its standard error in parentheses.
  2. bConcentration killing 50% with 95% fiducial limits in parentheses, in μg Cry1Ac per mL diet.
  3. cResistance ratio, the LC50 for AQ189, AQ189♀ × APHIS-S♂ or AQ189♂ × APHIS-S♀ divided by the LC50 for APHIS-S.
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