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Table 1 Log probit analysis for the assessment of mortality in 3rd and 4th larval instars of the tobacco cutworm, Spodoptera litura by different entomopathogenic nematode strains (EPNs)

From: Biocidal potential of indigenous isolates of Entomopathogenic Nematodes (EPNs) against tobacco cutworm, Spodoptera litura Fabricius (Lepidoptera: Noctuidae)

EPN strains

Susceptibility (hrs)

LC50 (IJs/ml)

95% fiducial limit

Slope ± SE

Pearson's χ2

p-value

LL

UL

Against 3rd instar larvae

Heterorhabditis bacteriophora EUPT-SD

24

472.83

338.17

661.12

1.68 ± 0.39

0.730

0.010

48

150.79

111.36

204.17

1.42 ± 0.25

0.700

0.005

72

62.61

47.04

83.35

1.48 ± 0.24

0.092

0.003

96

36.76

29.14

46.37

1.98 ± 0.25

0.020

0.001

H. bacteriophora EUPT-R

24

472.80

342.89

651.94

1.88 ± 0.45

0.670

0.010

48

177.16

127.65

245.89

1.32 ± 0.25

0.470

0.007

72

72.23

54.25

96.18

1.47 ± 0.24

0.330

0.003

96

41.33

32.58

52.41

1.88 ± 0.25

0.020

0.002

H. bacteriophora EUPT-KN

24

439.57

322.37

599.39

1.92 ± 0.44

0.820

0.010

48

183.47

135.32

248.75

1.45 ± 0.26

0.930

0.005

72

68.04

50.03

92.54

1.36 ± 0.24

0.630

0.004

96

46.81

37.63

58.22

2.04 ± 0.25

0.001

0.001

H. bacteriophora EUPT-K

24

439.57

322.37

599.39

1.92 ± 0.44

0.820

0.010

48

183.47

135.32

248.75

1.45 ± 0.26

0.930

0.005

72

68.86

51.94

91.31

1.49 ± 0.24

0.550

0.003

96

45.48

36.73

56.33

2.10 ± 0.26

0.750

0.009

H. bacteriophora EUPT-H

24

542.35

384.06

765.87

1.78 ± 0.45

0.690

0.010

48

155.84

117.07

207.43

1.52 ± 0.26

0.630

0.004

72

71.40

51.59

98.83

1.29 ± 0.23

0.400

0.005

96

42.78

33.92

53.94

1.93 ± 0.25

0.002

0.001

Against 4th instar larvae

H. bacteriophora EUPT-SD

24

463.84

335.28

641.69

1.79 ± 0.41

0.709

0.010

48

174.93

125.72

243.41

1.31 ± 0.25

0.640

0.007

72

65.43

49.34

86.77

1.49 ± 0.24

0.050

0.003

96

37.83

29.70

48.19

1.87 ± 0.25

0.040

0.002

H. bacteriophora EUPT-R

24

472.80

342.89

651.94

1.88 ± 0.45

0.667

0.013

48

177.22

129.70

242.16

1.40 ± 0.26

0.606

0.006

72

73.51

55.42

97.49

1.49 ± 0.24

0.250

0.003

96

43.36

33.83

55.57

1.77 ± 0.24

0.040

0.002

H. bacteriophora EUPT-KN

24

527.74

375.91

740.88

1.82 ± 0.45

0.350

0.016

48

189.32

141.55

253.21

1.53 ± 0.27

0.380

0.005

72

78.47

56.75

108.49

1.29 ± 0.24

0.420

0.005

96

50.06

40.13

62.43

1.99 ± 0.24

0.001

0.001

H. bacteriophora EUPT-K

24

527.74

375.91

740.88

1.82 ± 0.45

0.350

0.020

48

189.32

141.55

253.21

1.53 ± 0.27

0.380

0.005

72

79.95

58.86

108.59

1.37 ± 0.24

0.490

0.004

96

48.80

39.14

60.86

2.00 ± 0.25

0.016

0.001

H. bacteriophora EUPT-H

24

439.57

322.37

599.39

1.92 ± 0.44

0.230

0.012

48

183.47

135.32

248.75

1.43 ± 0.26

0.930

0.005

72

78.47

56.75

108.49

1.29 ± 0.24

0.420

0.005

96

46.80

37.38

58.59

1.97 ± 0.27

0.002

0.001

  1. *LC50: Median Lethal Concentration; S. E.: Standard Error; Pearson's χ2: Pearson’s Chi Square Value