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Table 4 Molt inhibitory concentration of susceptible and field population of Spodoptera exigua to Cry1Ac toxin during 2016

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

Larval instars

POP

MIC50

Fiducial limit

Equation

χ 2

RR

P value (df = 5)

L1

SS

0.05 + 0.00

0.01–0.07a

− 0.21X − 2.23

2.00

1

0.85

FSD

0.12 + 0.02

0.08–0.51b

− 0.12X − 1.38

0.49

2.64

0.99

MLT

0.40 + 0.06

0.10–0.81bc

− 0.17X − 1.19

0.74

8.53

0.98

BWP

0.63 + 0.08

0.11–1.73bcd

− 0.17X − 0.99

0.49

13.43

0.93

L2

SS

0.08 + 0.01

0.04–0.21a

− 0.15X − 1.84

0.04

1

1.00

FSD

0.32 + 0.06

0.07–0.80ab

− 0.16X − 1.03

0.64

4.10

0.99

MLT

0.70 + 0.09

0.19–1.41bc

− 0.15X − 0.83

0.14

8.91

1.00

BWP

1.23 + 0.30

0.66–2.75bcd

− 0.13X − 0.56

0.26

15.63

0.99

L3

SS

0.11 + 0.07

0.07–0.42a

− 0.14X − 1.49

0.52

1

0.99

FSD

0.66 + 0.13

0.22–1.17ab

− 0.16X − 0.89

0.62

5.99

0.99

MLT

0.93 + 0.21

0.35–1.69bc

− 0.16X − 0.69

0.94

8.39

0.97

BWP

1.71 + 0.54

0.82–3.34bcd

− 0.15X − 0.41

0.24

15.44

0.79