title: Fumigant Activity of 6 Selected Essential Oil Compounds and Combined Effect of Methyl Salicylate And Trans-Cinnamaldehyde Against Culex pipiens pallens.
abstract: We studied the knockdown activity and lethal toxicity of 6 essential oil compounds-methyl salicylate, linalool, 2-phenethyl alcohol, eugenol, β-citronellol, and trans-cinnamaldehyde-as fumigants against adult female Culex pipiens pallens in the laboratory. Of the 6 products tested, trans-cinnamaldehyde was the most toxic (LC50  =  0.26 µl/l air, 24 h) with a slow knockdown time (KT95  =  176.5 min at 0.5 µl/l air). Methyl salicylate displayed a lower toxicity (LC50  =  1.17 µl/l air, 24 h) but the fastest knockdown activity (KT95  =  16.8 min) at the sublethal concentration 0.5 µl/l air. Furthermore, the binary mixture of methyl salicylate and trans-cinnamaldehyde exhibited a combined effect of fast knockdown activity and high toxicity against Cx. p. pallens adults, showing potential for development as natural fumigants for mosquito control.
authors.affiliation: 1  Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling, Shaanxi 712100, China.
authors.forename: Wei-Bin
authors.initials: WB
authors.lastname: Ma
authors.forename: Jun-Tao
authors.initials: JT
authors.lastname: Feng
authors.forename: Zhi-Li
authors.initials: ZL
authors.lastname: Jiang
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000171:Acrolein / Q000031:analogs & derivatives*; D000818:Animals; D003465:Culex; D005260:Female; D005651:Fumigation; D007306:Insecticides; D009032:Mosquito Control; D009822:Oils, Volatile; D012459:Salicylates
chemical_list: D007306:Insecticides; D009822:Oils, Volatile; D012459:Salicylates; D000171:Acrolein; C033069:methyl salicylate; C012843:cinnamaldehyde
keywords: Culex pipiens pallens; combined effect; fumigant activity; methyl salicylate; trans-cinnamaldehyde