【摘要】 以密度指数及叮人率为指标,通过连续十五年来的纵向观察,指出农田作物品种的更迭,对三带喙库蚊种群数量的变动有重要影响。当地恢复种植旱作物,该蚊失去水稻田这个主要孳生地之后,其密度指数逐渐下降至不足危害的水平(密度由17.33只降至0.27只/日落后两小时),叮人率亦相应减低(8.00降至0.33/人/夜)。相反,种植水稻面积增加,将导致该蚊密度的大幅度上升(409.80％)。更多还原

【Abstract】 This paper reports the relations between the population density of C. tritaeniorhynchus and the sorts of crop。From 1971 to 1985, the density and manbiting rate were used in outdoor man-net baiting method as indications for2 hrs after. sunset. The density decrease greatly even to a non-damageable level after the mosqu, itoes had lost their major breeding plaeesd (ensity 17,33 to 0.27). Only two adults were caught from June to Oct. 1983. Man-biting rate decreased from 8.0 to 0.33 during 1975～1983. On the contrary with the expansion of the area of paddy fields, the density of C. tritaeniorhynchus became tremendously will higher(409.80％), Increasing cotton plants and using pesticides be the mosquito controlling to decrease its population. In spite of any change in cultivations, the peal of nocturnal biting and strong exophilic activity always remain.更多还原