Distribution of Medically Important Mosquitoes in Nava Nakorn Industrial Estate, Pathum Thani Province, Thailand

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Sirima Kitvatanachai
Kritsana Janyapoon
Chamnarn Apiwathnasorn
Somjai Leemingsawat



Asurvey of the distribution of medically important mosquitoes was conducted in Nava Nakorn Industrial Estate, Pathum Thani Province from May to July, 2003. Mosquitoes were sampled bi-monthly by dipping, CO2 light trap and human landing catch. Five species of mosquito larvae were found in breeding sites with Culex species potentially breeding in this area. Cx. quinquefasciatus was found to be breeding at a higher rate than other species in both sites of study, followed by Cx. gelidus. An estimated 47 larvae/dip were found at breeding site A and 36 larvae at breeding site B. By light trap method, Cx. tritaeniorhynchus was the main species found (53.1%) at site A, and Cx. vishnui (54.8%) at site B. An average of 25 mosquitoes/trap/night was recorded at site A, which was double that of site B. The mosquitoes attracted to humans were mainly Cx. gelidus (site A: 35.9%; site B: 52.3%) followed by Cx. quinquefasciatus and Cx. vishnui. The highest mosquito landing activity was found at 19.00-21.00 hr and 23.00-24.00 hr, and the highest mosquito landing density was 21 mosquitoes/hour.

Keywords: mosquito distribution; industrial area

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