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Table 1 Lethal concentration of susceptible and field population of Spodoptera exigua to Cry1Ac toxin during 2015

From: Efficacy of Cry1Ac toxin from Bacillus thuringiensis against the beet armyworm, Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae)

Larval instars

POP

LC50

Fiducial limit

Equation

χ 2

RR

P value (df = 5)

L1

SS

0.45 ± 0.03

0.02–0.99a

0.17 + 1.09

9.82

1

0.08

FSD

0.86 ± 0.06

0.23–1.95ab

0.16X + 0.67

9.50

1.93

0.09

MLT

1.35 ± 0.08

0.31–3.09abc

0.15X − 0.21

14.09

3.01

0.01

BWP

2.52 ± 0.09

1.01–4.87bcd

0.14X + 0.44

11.81

5.63

0.04

L2

SS

1.08 ± 0.06

0.46–2.75a

0.17 + 0.94

6.19

1

0.29

FSD

2.62 ± 0.51

1.21–4.51ab

0.16X + 0.57

7.73

2.41

0.17

MLT

4.02 ± 0.89

3.04–6.81bc

0.13X + 0.30

6.83

3.71

0.23

BWP

5.74 ± 1.13

3.76–7.14bcd

0.14X − 0.09

7.60

5.30

0.02

L3

SS

2.01 ± 0.95

1.00–4.02a

0.13 + 0.609

1.21

1

0.94

FSD

4.65 ± 1.02

2.02–8.11ab

0.14X + 0.39

5.49

2.31

0.36

MLT

6.24 ± 1.38

2.72–9.48abc

0.14X + 0.20

9.57

3.10

0.09

BWP

7.85 ± 3.28

4.45–10.76bcd

0.16X − 0.02

8.78

3.89

0.12

  1. Different letters in the same column indicate significant differences due to non-overlapping basis of 95% CI