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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