Insecticidal Activity of Commiphora erythraea Essential Oil and Its Emulsions Against Larvae of Three Mosquito Species.

Autor:	Muturi EJ; USDA, Agricultural Research Service, NCAUR, Crop Bioprotection Research Unit, Peoria, IL., Hay WT; USDA, Agricultural Research Service, NCAUR, Mycotoxin Prevention and Applied Microbiology Research Unit, Peoria, IL., Doll KM; USDA, Agricultural Research Service, NCAUR, Bio-Oils Research Unit, Peoria, IL., Ramirez JL; USDA, Agricultural Research Service, NCAUR, Crop Bioprotection Research Unit, Peoria, IL., Selling G; USDA, Agricultural Research Service, NCAUR, Plant Polymer Research Unit, Peoria, IL.
Jazyk:	angličtina
Zdroj:	Journal of medical entomology [J Med Entomol] 2020 Nov 13; Vol. 57 (6), pp. 1835-1842.
DOI:	10.1093/jme/tjaa097
Abstrakt:	The use of essential oils as ecofriendly tools for vector management is one of the mainstreams for biopesticide research. We evaluated the larvicidal properties of Commiphora erythraea (opoponax) essential oil and its fractions against Culex restuans Theobald, Culex pipiens L., and Aedes aegypti L. The use of bio-based amylose-N-1-hexadecylammonium chloride inclusion complex (Hex-Am) and amylose-sodium palmitate inclusion complex (Na-Palm) as emulsifiers for C. erythraea essential oil was also investigated. Bisabolene was the most abundant chemical constituent in the whole essential oil (33.9%), fraction 2 (62.5%), and fraction 4 (23.8%) while curzerene (32.6%) and α-santalene (30.1%) were the dominant chemical constituents in fractions 1 and 3, respectively. LC50 values for the whole essential oil were 19.05 ppm for Cx. restuans, 22.61 ppm for Cx. pipiens, and 29.83 ppm for Ae. aegypti and differed significantly. None of the four C. erythraea essential oil fractions were active against mosquito larvae. Two CYP450 genes (CYP6M11 and CYP6N12) and one GST gene (GST-2) were significantly upregulated in Ae. aegypti larvae exposed to C. erythraea essential oil suggesting their potential involvement in metabolic pathways for C. erythraea essential oil. Essential oil emulsions produced with Hex-Am were more toxic than the whole essential oil while those produced with Na-Palm had similar toxicity as the whole essential oil. These findings demonstrate that C. erythraea essential oil is a promising source of mosquito larvicide and that the use of Hex-Am as an emulsifier can enhance the insecticidal properties of C. erythraea essential oil. (Published by Oxford University Press on behalf of Entomological Society of America 2020.)
Databáze:	MEDLINE
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