花蜜によるイエカ属およびヤブカ属成虫の飼育実験(第 4 報)

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The nectar-feeding activities of Aedes and Culex mosquitoes were investigated in the laboratory and field in 1974-75. The anthrone reaction by Van Handel (1972) was used to detect fructose in the mosquitoes. The feeding tests of three species of mosquitoes on the flowers of 11 nectar plants showed that Aedes albopictus was heavier feeder than other two species, Aedes togoi and Culex pipiens molestus, and the last was lowest in the feeding rate. The rate of nectar feeding, however, varied depending on the flower species offered. C. p. molestus appeared to feed heavily on some nectar flowers such as snowbell and sumac. The nectar-feeding activities of the mosquitoes increased gradually with the days after emergence; A. togoi fed on the flowers of chestnut tree reached a peak of 97.9% on the 9th feeding day. Both male and female A. albopictus which had been fed on the flower nectaries showed 80-90% feeding rate during 8hr after the feeding, but only 31% after 24hr, while the percentages of individuals reacted heavily with the fructose reagent decreased rapidly with the time elapsed. An investigation on natural nectar feeding of the wild-caught A. albopictus indicated that the feeding rate of males was significantly higher than that of females, 65.1% vs 53.6%, during the period from late-September to mid-October. The females of C. p. pallens, C. orientalis and C. hayashii collected from the caves during the winter months, from November to February, were anthrone-positive at the rates of 10.9%, 3.2% and 3.7% respectively. A small number of other species such as C. tritaeniorhynchus and C. bitaeniorhynchus were negative. When 13 females of the overwintering C. p. pallens fed on the loquat flowers in a laboratory cage in mid-December, 46.2% were fed heavily in 24hr. This proves some of the mosquitoes to re-feed on plant nectar during the early overwintering period.
日本衛生動物学会の論文
1975-12-15

花蜜によるイエカ属およびヤブカ属成虫の飼育実験(第 4 報)

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