关键词: 致倦库蚊, 代谢化合物, 乙酸, 丙酸, 辛酸, 乳酸, 1?辛烯?3醇, 尿素, 陷阱诱捕法

Abstract: Objective　To evaluate the indoor effect of six human metabolic compounds for trapping adult Culex pipiens quinquefasciatus. Methods　The effects of six human metabolic compounds alone (acetic acid, propionic acid, octanoic acid, lactic acid, 1?octene?3?alcohol and urea alone), liquid lactic acid, acetic acid, propionic acid, octanoic acid, lactic acid or 1?octene?3?alcohol in combination with urea at an equal mass ratio, and lactic acid?urea combinations at various mass ratios, for trapping Cx. p. quinquefasciatus were examined using the trapping method, while the dechlorinated water served as a control. Results　The indoor mosquito?trapping efficacy of the six human metabolic compounds was all superior to the dechlorinated water. Acetic acid, propionic acid, octanoic acid, or 1?octene?3?alcohol combined with urea at a mass ratio of 1∶1 had a comparable mosquito?trapping efficacy with acetic acid, propionic acid, octanoic acid, or 1?octene?3?alcohol alone (all P values > 0.05). The lactic acid?urea combination at a mass ratio of 1∶1 had a significantly higher mean cumulative trapping capacity [(35.60 ± 8.11) mosquitoes]than lactic acid [(20.80 ± 8.53) mosquitoes], urea [(17.00 ± 7.18) mosquitoes] or dechlorinated water alone (7.20 ± 2.68) (all P values < 0.05). In addition, the lactic acid?urea combinations at mass ratios of 1∶1, 1∶2, 1∶3, 1∶4 or 1∶5 all had significantly greater mosquito?trapping efficacies than lactic acid, urea or dechlorinated water alone (all P values < 0.05), and the optimal combination (lactic acid?urea at a 1∶4 mass ratio) had a mean cumulative trapping capacity of (56.20 ± 9.88) mosquitoes, which was significantly superior to lactic acid [(17.00 ± 3.94) mosquitoes], urea [(16.40 ± 3.78) mosquitoes] or dechlorinated water alone [(7.40 ± 3.44) mosquitoes] (all P values < 0.05). Conclusions　The lactic acid?urea combination remarkably increases the indoor trapping capability of Cx. p. quinquefasciatus, and this combination has a weak smell, which is suitable to be used at home and office environments.

Key words: Culex pipiens quinquefasciatus, Metabolic compound, Acetic acid, Propionic acid, Octanoic acid, Lactic acid, 1?octene?3?alcohol, Urea, Trapping method