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Table 3 Mortality of susceptible and Bt Cry1C—tolerant strains of S. littoralis larvae

From: Alterations in the expression of certain midgut genes of Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae) larvae and midgut histopathology in response to Bacillus thuringiensis Cry1C toxin

Strain Toxin conc. (μg/g diet) Mortality (%)
Susceptible 0.2 10.00
0.4 16.67
0.8 23.33
1.6 40.00
3.2 70.00
Tolerant 1st generation 0.5 6.67
2.0 23.33
6.0 60.00
10.0 73.33
Tolerant 10th generation 2.0 6.67
4.0 13.33
8.0 33.33
16.0 66.67
32.0 76.67