Abstract
The autogenous type of Culex pipiens, so-called Culex pipiens molestus, has recently been an important nuisance pest in urban districts of Japan. The authors made a study on the breeding sources of the mosquito and their control method in Kawasaki city. The mosquitoes were found in 45.5% of septic tanks and in 50% of underground sewage tanks. Their control was successful by the application of 1ppm of diazinon emulsion or of Baytex granules.
