Macías-Duarte Alberto, Alvarado-Castro J Andrés, Dórame-Navarro María E, Félix-Torres A Amalia
Centro de Estudios Superiores del Estado de Sonora, Unidad Académica Hermosillo, Ley Federal del Trabajo SIN y Perimetral, Colonia Apolo Hermosillo, Sonora, Mexico, 83100, USA.
J Am Mosq Control Assoc. 2009 Dec;25(4):417-24. doi: 10.2987/08-5847.1.
Dengue is a serious public health problem worldwide. Biological control of its vector, Aedes aegypti, remains a feasible option in light of increasing urbanization and insecticide resistance. We studied the dispersal and oviposition activity of Toxorhynchites moctezuma in a dengue-endemic urban area in SSonora, Mexico, to provide information about the potential of Toxorhynchites as a control agent for Ae. aegypti in arid areas. We released 210 and 100 laboratory-reared gravid females of Tx. moctezuma in 2 city blocks during the summer and fall of 1993. We set 3 1-liter containers and 1 car tire as sentinel traps at each of 10 backyards within each city block. Spatial and temporal patterns of dispersal and oviposition activity differed between city blocks and between releases. However, a Cox regression analysis showed no significant difference in the per-day probability of Tx. moctezuma oviposition events in sentinel traps between summer and fall releases. Per-day oviposition probability was nearly 5 times greater for sentineltraps that contained larvae of Ae. aegypti, suggesting a high specificity of the predator for its prey. The proportion of sentinel traps positive for Tx. moctezuma eggs did not increase substantially after the 8th day piost-release, reaching 66% and 23% for sentinel traps with and without Ae. aegypti larvae, respectively.
登革热是全球严重的公共卫生问题。鉴于城市化进程加快和蚊虫抗药性增强，对其病媒埃及伊蚊进行生物防治仍是一种可行的选择。我们研究了墨西哥索诺拉州一个登革热流行的城市地区墨西哥食蚊鱼的扩散和产卵活动，以提供有关墨西哥食蚊鱼作为干旱地区埃及伊蚊控制剂潜力的信息。1993年夏秋两季，我们在两个城市街区释放了210只和100只实验室饲养的怀孕雌性墨西哥食蚊鱼。我们在每个城市街区内的10个后院中，每个后院设置3个1升的容器和1个汽车轮胎作为哨兵诱捕器。不同城市街区和不同释放批次之间，扩散和产卵活动的空间和时间模式存在差异。然而，一项Cox回归分析表明，夏季和秋季释放的墨西哥食蚊鱼在哨兵诱捕器中产卵事件的每日概率没有显著差异。对于含有埃及伊蚊幼虫的哨兵诱捕器，每日产卵概率几乎高出近5倍，这表明捕食者对其猎物具有高度特异性。释放后第8天之后，检测到墨西哥食蚊鱼卵的哨兵诱捕器比例没有大幅增加，有和没有埃及伊蚊幼虫的哨兵诱捕器中这一比例分别达到66%和23%。
