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Table 2 Toxicity of different ethanolic plant extracts (µg/larva) against second instars of S. litura

From: A plant-based extract mixture for controlling Spodoptera litura (Lepidoptera: Noctuidae)

Compounds C. longa S. trilobata A. galanga
Dose 24 h 48 h 24 h 48 h 24 h 48 h
LD50 108.894 106.171 41.993 41.141 30.5 29.703
LD50 SE 12.104 11.77 3.466 3.39 3.472 3.366
Chi square 31.26 20.83 8.83 7.95 3.72 3.74
LD50 LCL 90.81 88.492 35.64 34.913 24.27 23.643
LD50 UCL 240.274 136.542 49.239 48.207 37.882 36.831
Slope ± SE 2.30 ± 0.31 2.25 ± 0.29 2.28 ± 0.23 2.29 ± 0.23 1.64 ± 0.17 1.65 ± 0.17
Compounds P. nigrum A. calamus P. retrofractum
Dose 24 h 48 h 24 h 48 h 24 h 48 h
LD50 27.91 25.805 11.044 9.78 5.575 5.522
LD50 SE 3.227 2.891 0.87 0.804 0.522 0.507
Chi square 3.04 2.84 4.62 5.75 0.53 0.45
LD50 LCL 22.37 20.752 9.474 8.319 4.597 4.569
LD50 UCL 35.042 32.169 12.9 11.479 6.631 6.546
Slope ± SE 1.41 ± 0.13 1.44 ± 0.13 2.44 ± 0.22 2.30 ± 0.21 2.19 ± 0.27 2.24 ± 0.27
  1. LD50 lethal dosage that kills 50% of the exposed larvae, expressed in μg/larvae; SE standard error; LCL lower confidence limit; UCL upper confidence limit