Maeda O, Takenokuma K, Karoji Y, Matsuyama Y
Jpn J Med Sci Biol. 1978 Feb;31(1):27-37. doi: 10.7883/yoken1952.31.27.
Mosquito collections by using light traps have been carried out at 10 to 11 stations in Kyoto City area at intervals of about 10 days every year. Mean percent indexes (MPI), being calculated from the data of mosquito collections, were used for comparison of the annual abundance of mosquitoes. It is no doubt that Culex tritaeniorhynchus summorosus has decreased recently and this decrease is correlated with the reduction of human patients of Japanese encephalitis. Wide use of two herbicides, CNP and nitrofen, for rice plant cultivation, may probably be one of the reasons for the decrease of the mosquitoes.
每年大约每隔10天，在京都市地区的10至11个站点使用诱蚊灯进行蚊虫采集。根据蚊虫采集数据计算出的平均百分比指数（MPI）用于比较蚊虫的年度丰度。毫无疑问，三带喙库蚊夏型最近有所减少，这种减少与日本脑炎人类患者数量的减少相关。在水稻种植中广泛使用两种除草剂，CNP和除草醚，可能是蚊虫减少的原因之一。
