摘要
新疆阿勒泰北屯地区位于额尔齐斯河下游,夏季蚊虫泛滥,严重威胁当地人民的身体健康。本研究跟踪调查了各种水体的幼蚊滋生情况,确定了幼蚊发生的2个高峰期分别出现在5月下旬至6月上旬及6月下旬至7月上旬,同时确定了洪水型积水、排碱渠积水和漫灌林带积水是幼蚊高发的孳生地类型。采集并对蚊虫样品进行形态学鉴定,确定了该地区的优势蚊种为刺扰伊蚊Aedes vexans。用苏云金芽胞杆菌以色列亚种Bacillus thuringiensis subsp.israelensis(Bti)水剂对该蚊种进行了室内生测,其LC50和LC90分别为0.055和0.198 mg/L。分别选取3种高发孳生地的3处积水进行野外试验,发现48 h后该药剂对幼蚊的杀灭率均在96%以上,对大面积孳生地也有很好的杀灭作用。监测显示成蚊出现的高峰时间是每年的6月上旬至6月中旬及7月中旬至7月下旬。连续施药3年后,2013年的成蚊数量相比2011年时下降幅度超过50%。本研究对于北屯地区蚊虫的进一步控制以及Bti制剂在新疆的推广有重要的意义。
This experiment was conducted in Altay Beitun region, locating in the valley basin area of the Irtysh River in Xinjiang, where mosquito occurs severely in the summer and endangers health of the local residents. This study identified two occurrence peaks of mosquito larvae, late May to early June and late June to early July and two peaks of mosquito adults, early to middle June and middle to late July. The major breeding sites of mosquito larvae were flooded meadows, drainage systems and flooded forest zones containing stagnant water. Aedes vexans was determined to be the dominant species in this region by morphological classification. The effectiveness of Bacillus thuringiensis subsp. israelensis(Bti) agent for control of A. vexans was tested. The LC50 and LC90 were 0.055 and 0.198 mg/L, respectively. Field test at sites with stagnant water and high density of mosquito larvae showed a mortality of above 96% after 48 h. With continuous use of the pesticide for three years(from 2011—2013), the number of adult mosquitoes in 2013 decreased more than 50% compared to that in 2011. These results will help control mosquitoes in Beitun town and in other regions in Xinjiang in the future.
出处
《中国生物防治学报》
CSCD
北大核心
2015年第3期340-345,共6页
Chinese Journal of Biological Control
基金
中国科学院科学技术支持创新项目(Y103031YH1)
国家科技惠民计划(Y403031GM1)
科技援疆计划(2011AB003)
关键词
刺扰伊蚊
苏云金芽孢杆菌以色列亚种
生测
孳生地
Aedes vexans
Bacillus thuringiensis subsp.israelensis
bioassay
mosquito breeding grounds