Seasonal prevalence of mosquitoes in yokohama city japan 1969 1974

Saito, K.; Hirano, S.; Hayashi, S.

Medical Entomology and Zoology 27(2): 195-196


Accession: 006373758

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Mosquitoes were collected in residential areas of Yokohama City, Japan for 6 yr from 1969-1974. A total of 246 individuals were collected. Of these, 177 (72%) were Culex pipiens, 25 (10.2%) were Culex tritaeniorhynchus and 23 (9.3%) were Anopheles sinensis. These species constituted 91.5% of the mosquitoes collected. Culex tritaeniorhynchus, which is a paddy field type, decreased and Culex pipiens, which is a city type, constituted higher percentages of mosquito populations since 1972. This may be due to the decreases in habitats in the corresponding years. Mosquitoes were not collected from Jan.-April, mosquitoes were active from May-Dec., and the most prevalent period was July-Aug.