Late season commercial mosquito trap and host seeking activity evaluation against mosquitoes in a malarious area of the Republic of Korea

Abstract

Field trials evaluating selected commercially available mosquito trapsvariously baited with light, carbon dioxide, and/or octenol were conducted from 18-27September 2000 in a malarious area near Paekyeon-ri (Tongil-Chon ) and Camp Greavesin Paju County, Kyonggi Province, Republic of Korea. The host-seeking activity forcommon mosquito species, including the primary vector of Japanese encephalitis, Culextritaeniorhynchus Giles, was determined using hourly aspirator collections from a humanand propane lantern-baited Shannon trap during hours when temperatures exceeded15C. The total number of mosquitoes and number of each species captured during thetest was compared using a block design. Significant differences were observed for the totalnumber of mosquitoes collected, such that, the Mosquito MagnetTM with octenol >Shannon trap > ABC light trap with light and dry ice > Miniature Black Light trap(manufactured by John W. Hock) > New Jersey Trap > ABC light trap with light only.Significant differences in numbers collected among traps were noted for several speciesincluding: Aedes vexans (Meigen), Anopheles lesteri Baisas and Hu, An. sinensisWeidemann, An. sineroides Yamada, An. yatsushiroensis Miyazaki, Culex pipiens pallensCoquillett L., Cx. orientalis Edwards and Cx. tritaeniorhynchus . Host-seeking activity formost common species showed a similar bimodal pattern. Results from these field trapevaluations can significantly enhance current vector and disease surveillance effortsespecially for the primary vector of Japanese encephalitis, Cx. tritaeniorhynchus .