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 報補遺

抄録

The nectar feeding activities of Aedes albopictus, which was captured from the field by biting-collection method, were investigated in 1975. The anthrone reaction by Van Handel (1972) was used to detect fructose in the mosquitoes. The nectar feeding rates of 752 males and 1179 females were 62.6% vs 57.0% respectively during the period from late-June to mid-October. Chisquare analysis showed no significant difference between the sexes except late-June female collection and the average feeding rate was 59.1% in the total 1931 mosquitoes. Sugar detection in the mosquitoes collected in the morning (06 : 00-08 : 00) and in the evening (16 : 30-17 : 30) resulted that the five cases were significantly high in the feeding rates in the morning but other six cases showed no significant difference between the both collections. The mosquitoes collected after typhoon were anthrone-positive at the rate of only 18.3%. This suggests that many nectar sources were temporarily damageable by heavy rain and wind.