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Table 3 Lethal 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 LC50 Fiducial limit Equation χ 2 RR P value (df = 5)
L1 SS 0.45 ± 0.14 0.12–1.00a 0.18 + 1.06 6.68 1 0.25
FSD 1.03 ± 0.41 0.61–1.98ab 0.16X + 0.56 8.61 2.28 0.12
MLT 1.59 ± 0.53 0.84–2.87abc 0.14X + 0.34 9.70 3.53 0.08
BWP 2.83 ± 0.75 1.53–4.90bcd 0.16X − 0.13 12.74 6.25 0.02
L2 SS 1.10 ± 0.10 0.60–2.77a 0.16X + 0.86 1.29 1 0.94
FSD 2.96 ± 0.72 1.73–4.73ab 0.14X + 0.38 5.11 2.68 0.40
MLT 4.43 ± 1.08 3.11–6.46bc 0.14X + 0.21 4.72 4.01 0.45
BWP 5.91 ± 1.40 3.87–8.49bcd 0.15X − 0.01 4.60 5.35 0.46
L3 SS 2.01 ± 0.95 1.00–4.02a 0.13 + 0.61 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 3.09 0.09
BWP 7.85 ± 3.28 4.45–10.76bcd 0.16X − 0.02 8.78 3.89 0.12