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Table 2 Susceptibility of larvae of cabbage butterfly, Pieris brassicae from different locations to Bt Cry1C toxin

From: Baseline susceptibility of cabbage butterfly, Pieris brassicae (Linnaeus) (Lepidoptera: Pieridae) to Bacillus thuringiensis (Berliner) Cry toxins in Meghalaya

Regions

Numbers

LC50 (95% FL) µg/ml

Slope ± SE

χ2 (df)

Resistance ratio

Umiam

240

1.803 (1.53–2.04)1.53-

4.26 ± 0.60

5.04(5)

3.30

Kharpati

240

1.564 (1.25–1.83)

3.51 ± 0.55

3.69(5)

2.86

Mawpun

240

1.626 (1.25–1.93)

2.90 ± 0.50

3.09(5)

2.98

Umroi

240

1.650 (1.34–1.90)

3.64 ± 0.55

3.92(5)

3.02

Umeit

240

1.642 (1.35–1.89)

3.91 ± 0.58

2.29(5)

3.01

Mawklot

240

1.674 (1.31–1.98)

3.02 ± 0.51

1.96(5)

3.06

Pepbah

240

1.776 (1.40–2.10)

2.91 ± 0.50

3.82(5)

3.25

Smit

240

0.546 (0.41–0.71)

1.85 ± 0.22

4.61(5)

_

Mookyndur

240

1.720 (1.43–1.97)

3.86 ± 0.57

4.47(5)

3.15

Sohphoh

240

1.532(1.14–1.85)

2.69 ± 0.47

4.92(5)

2.80

Wahiajer

240

1.397 (1.01–1.76)

2.04 ± 0.33

3.97(5)

2.56

  1. Test for heterogeneity; χ2 value was significant at 5% level of significance for a goodness-of-fit test for each regression
  2. SE, Standard error; N, No. of test insects; 95% FL, 95% fiducial limits