Effect of mosquito lures and location types on the abundance of mosquitoes collected using Black Hole light traps at different collection periods.

Authors

Kanlayanee Powchai, Suthat Lhaosudto, Hassan Niyomdecha, Pithak Phonphai, Watthanasak Lertlumnaphakul, Jirod Nararak, Ratchadawan Ngoen-Klan, Theeraphap Chareonviriyaphap

Published in

Journal of medical entomology. Volume 63. Issue 5. Sep 04, 2026.

Abstract

Mosquito-borne diseases are considered a concern by the Ministry of Public Health, Thailand. Carbon dioxide (CO2)- and host-odor-based lures have been evaluated individually for their effectiveness in attracting mosquitoes. This study addressed a gap in mosquito surveillance by comparing 3 potential lures (yeast-generated CO2, BG-lure, and KU-lure) with UV-LED light traps at Kasetsart University, Bangkok, considering the effects of location types and collection periods. Over 48 trap-nights, a total of 1,713 mosquitoes were collected across 4 subsites (2 per location type: recreational park and residential area). Genus-level identification revealed the dominance of Culex (85.40%) and Aedes (13.60%). A generalized linear mixed model (GLMM) with a negative binomial distribution revealed that mosquito catch fluctuations were driven by spatial heterogeneity across subsites and temporal variation across nights. Among treatments, yeast-generated CO2 was the most effective, accounting for 49.21% of collections, with a catch rate ratio nearly 3-fold higher than the light trap alone (Exp (B) = 2.912, P < 0.001). Conversely, the BG-lure and KU-lure did not differ significantly from the control. Results for Cx. quinquefasciatus, the dominant species, were similar; both the trap lure and collection period significantly influenced the species abundance, whereas location type had no significant effect. Yeast-generated CO2 significantly enhanced light-trap captures (Exp (B) = 2.273, P < 0.001), whereas BG-lure and KU-lure did not differ from the control. Culex quinquefasciatus abundance increased throughout the night, peaking during 2 AM to 6 AM. Yeast-generated CO2 attracted the most mosquitoes across all treatments. This study provides evidence for lure selection in light-trap-based mosquito surveillance, supporting vector control efforts in Thailand.

PMID:
42838713
Bibliographic data and abstract were imported from PubMed on 07 Oct 2026.

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