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1 September 2012 Evaluation of Several Novel Alkynols, Alkenols, and Selected Host Odor Blends as Attractants to Female Aedes albopictus and Culex quinquefasciatus
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The compound 1-octen-3-ol is a strong attractant for some mosquito species. Based on chemical structure, this may be due to a terminal site of unsaturation or high electron density, a structural capability for hydrogen bonding, e.g., -OH, -NH2, NHR, NR2, etc., a saturated hydrocarbon chain of a certain minimum length, and a certain relative distance between the region of high electron density and the alcohol (or other hydrogen-bonding) functional group. Based on this hypothesis, 4 novel alkynol (triple-bonded) analogs were synthesized and evaluated alone or in combination with acetone and dimethyl disulfide, and with and without carbon dioxide in Mosquito Magnet-X© suction traps. Attraction of laboratory-reared adult Aedes albopictus and Culex quinquefasciatus to these analogs and combinations was compared to 1-octen-3-ol as a standard in semi–field trials. For both species none of the alkynols, with and without carbon dioxide or acetone and dimethyl disulfide, were significantly different from 1-octen-3-ol. The compounds 2-octyn-4-ol and 2-nonyn-4-ol alone and with carbon dioxide suppressed Cx. quinquefasciatus collections. An additional 6 alkenol (double-bonded) analogs were tested in mixtures with 3-n-propylphenol and 4-methylphenol in a ratio of 4∶1∶8, respectively. Using the same trapping methods, Cx. quinquefasciatus catches containing 3-decen-1-ol were increased nearly 3-fold when combined with carbon dioxide. Aedes albopictus collections in traps with the 3-decen-1-ol/phenol mixture and carbon dioxide were significantly greater than similar traps with 1-octen-3-ol. Traps baited with the phenol blends that incorporated (Z)-3-nonen-1-ol, (Z)-8-nonen-3-ol, or 1-octen-3-ol were considerably suppressed in the presence of carbon dioxide.

J.E. Cilek, C.O. Ikediobi, C.F. Hallmon, R. Johnson, O. Okungbowa, E.N. Onyeozili, L.M. Khalil, L. Ayuk-Takem, L.M. Latinwo, and U.R. Bernier "Evaluation of Several Novel Alkynols, Alkenols, and Selected Host Odor Blends as Attractants to Female Aedes albopictus and Culex quinquefasciatus," Journal of the American Mosquito Control Association 28(3), 199-205, (1 September 2012).
Published: 1 September 2012

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