PMID: 2511272Sep 1, 1989Paper

Comparison of several different trapping methods for Culicoides variipennis (Diptera: Ceratopogonidae)

Journal of the American Mosquito Control Association
J R Anderson, A X Linhares

Abstract

When battery operated CDC miniature incandescent and black light traps (with and without light bulbs) were operated with and without CO2, the rank of trap effectiveness for total numbers of female Culicoides variipennis caught was: black light plus CO2; CO2-baited trap without light bulb; black light without CO2; incandescent light plus CO2 and incandescent light without CO2. In 1983, the black light trap plus CO2 caught significantly more males and females than any other traps, and the incandescent light trap without CO2 caught significantly fewer females than any other traps. There were significant differences also in times gnats were collected, as well as in the gonotrophic condition of females caught in traps and that different traps caught different physiological/reproductive segments of the population. All catches revealed that gravid females began flying only a few min before sunset and peaked in the 1st h after sunset. Because it caught significantly larger numbers of females than other traps and because it was selectively attractive to gravid and parous females, the black light trap would be the trap of choice when large numbers of parous females are desired in arbovirus isolation studies.

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