Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand

From February 1987 to January 1988, biological and ecological studies were made to obtain the basic knowledge of Japanese encephalitis vectors, Culex tritaeniorhynchus, Cx. gelidus, and Cx. fuscocephala, in Amphoe Muang, Chiang Mai, northern Thailand. The following results were found. Peaks in the p...

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Main Authors: Somboon P., Choochote W., Khamboonruang C., Keha P., Suwanphanit P., Sukontasan K., Chaivong P.
Format: Article
Language:English
Published: 2014
Online Access:http://www.ncbi.nlm.nih.gov/pubmed/3502482
http://cmuir.cmu.ac.th/handle/6653943832/3582
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-35822014-08-30T02:35:04Z Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand Somboon P. Choochote W. Khamboonruang C. Keha P. Suwanphanit P. Sukontasan K. Chaivong P. From February 1987 to January 1988, biological and ecological studies were made to obtain the basic knowledge of Japanese encephalitis vectors, Culex tritaeniorhynchus, Cx. gelidus, and Cx. fuscocephala, in Amphoe Muang, Chiang Mai, northern Thailand. The following results were found. Peaks in the population densities of the vectors as measured four times a month, by UV-light trap and human-baited trap collections, occurred during rainy season. The JE vectors in rural areas showed a sharp rise in the population in July when most of the rice fields were ploughed and a marked decline in mosquito population densities occurred after transplanting in August when the fields were flooded. The average number of larvae plus pupae per m2 in rice fields was highest in July when the fields were ploughed, but in the period from transplanting to harvesting (August to November), the densities were very low. Daily survival rates of the adult females, as estimated from parous rates, were mostly as high as 0.7 throughout the year. 2014-08-30T02:35:04Z 2014-08-30T02:35:04Z 1989 Journal Article 0125-1562 2549646 http://www.ncbi.nlm.nih.gov/pubmed/3502482 http://cmuir.cmu.ac.th/handle/6653943832/3582 eng
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description From February 1987 to January 1988, biological and ecological studies were made to obtain the basic knowledge of Japanese encephalitis vectors, Culex tritaeniorhynchus, Cx. gelidus, and Cx. fuscocephala, in Amphoe Muang, Chiang Mai, northern Thailand. The following results were found. Peaks in the population densities of the vectors as measured four times a month, by UV-light trap and human-baited trap collections, occurred during rainy season. The JE vectors in rural areas showed a sharp rise in the population in July when most of the rice fields were ploughed and a marked decline in mosquito population densities occurred after transplanting in August when the fields were flooded. The average number of larvae plus pupae per m2 in rice fields was highest in July when the fields were ploughed, but in the period from transplanting to harvesting (August to November), the densities were very low. Daily survival rates of the adult females, as estimated from parous rates, were mostly as high as 0.7 throughout the year.
format Article
author Somboon P.
Choochote W.
Khamboonruang C.
Keha P.
Suwanphanit P.
Sukontasan K.
Chaivong P.
spellingShingle Somboon P.
Choochote W.
Khamboonruang C.
Keha P.
Suwanphanit P.
Sukontasan K.
Chaivong P.
Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand
author_facet Somboon P.
Choochote W.
Khamboonruang C.
Keha P.
Suwanphanit P.
Sukontasan K.
Chaivong P.
author_sort Somboon P.
title Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand
title_short Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand
title_full Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand
title_fullStr Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand
title_full_unstemmed Studies on the Japanese encephalitis vectors in Amphoe Muang, Chiang Mai, Northern Thailand
title_sort studies on the japanese encephalitis vectors in amphoe muang, chiang mai, northern thailand
publishDate 2014
url http://www.ncbi.nlm.nih.gov/pubmed/3502482
http://cmuir.cmu.ac.th/handle/6653943832/3582
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