Composition of the essential oil and aqueous leachate from Heracleum mantegazzianum seeds and their larvicidal activity against an invasive mosquito Aedes japonicus
Composition of the essential oil and aqueous leachate from Heracleum mantegazzianum seeds and their larvicidal activity against an invasive mosquito Aedes japonicus
- Author(s) Beáta Baranová,Vincent Sedlák, Danuta Kalemba, Ewa Maciejczyk, Karolina Wawrzynczak,Daniela Grulová, Barbora Kudlácková, Jozef Obona
- Year: 2024
- Month: January
- Volume: 61
- Pages: 16-Jan
This study evaluated the chemical composition of essential oil and aqueous leachate from seeds of the invasive neophyte Heracleum mantegazzianum and tested their larvicidal activity against the invasive mosquito Aedes japonicus. Octyl acetate (58.65 %), followed by hexyl 2-methylbutyrate (10.61 %) and hexyl butyrate (9.37 %) dominated the essential oil. Therefore, the larvicidal activity of octyl acetate was tested as well. The 3-hydroxybenzoic acid, syringic acid, and chlorogenic acid were dominant polyphenols in the aqueous leachate. The LC50 and LC90 values of essential oil were 0.067 mg/mL (0.050-0.088) and 0.179 mg/mL (0.135-0.239), those of octyl acetate were as follows: LC50 0.052 mg/mL (0.041-0.065), LC90 0.103 mg/mL (0.082-0.130). The larvicidal effect of the aqueous leachate was expressively lower; values of LC50 and LC90 were 9.235 mg/mL (7.144-11.94) and 32.88 mg/mL (25.44-42.50) respectively. Essential oil, octyl acetate, and aqueous leachate caused some mortality in non-target organisms, too; however, they were significantly lower than those of Asian bush mosquito larvae.
