Mosquito Larvicidal Constituents from the Ethanol Extract of Inula racemosa Hook. f. Roots against Aedes albopictus

Table 1

Larvicidal activity of the ethanol extract of Inula racemosa roots and the isolated constituents against fourth-instar larvae of Aedes albopictus.

Treatment	LC50 (μg/mL); (95% FL)	LC95 (μg/mL); (95% FL)	Slope ± SD	Chi-square value
Ethanol extract	25.23; (22.71–27.41)	95.48; (84.43–105.08)	2.52±0.25	9.73*
11,13-Dihydroisoalantdactone (1)	21.86; (19.58–24.21)	83.45; (75.87–93.21)	2.49±0.24	9.45*
Macrophyllilactone E (2)	18.65; (15.59–20.41)	68.23; (61.92–75.12)	2.68±0.27	8.894*
5𝛼-Epoxyalantolactone (3)	29.37; (26.79–32.23)	111.43; (100.34–123.04)	2.56±0.26	11.12*
Epoxyisoalantolactone (4)	35.13; (31.54–38.63)	129.43; (127.55–142.32)	2.23±0.23	9.45*
Chlorpyrifos	1.86; (1.71–2.05)	6.65; (6.21–7.48)	0.87±0.01	3.13*

∗Significant at 𝑃<0.05 level.