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

Chemical and Biological Technologies in Agriculture

Table 3 Toxicity of some active compounds (µg/larva) against second instars of S. litura at 24 h

	Plant source	LD₅₀	LD₅₀ LCL	LD₅₀ UCL	Slope ± SE	Chi square
Beta-asarone	A. calamus	6.24	4.62	8.66	1.44 ± 0.16	5.67
Alpha-asarone	A. calamus	2.22	1.74	2.61	2.94 ± 0.42	0.11
(2E,4E,14Z)-N-isobutylicosa-2,4,14-trienamide	P. retrofractum	1.66	1.34	1.95	2.19 ± 0.33	0.02
Piperine	P. retrofractum	81.56	36.71	181.27	2.10 ± 0.66	28.86

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