Xue Rui-De, Müller Günter C, Kline Daniel L, Barnard Donald R
Anastasia Mosquito Control District, 500 Old Beach Road, St. Augustine, FL 32080, USA.
J Am Mosq Control Assoc. 2011 Mar;27(1):56-60. doi: 10.2987/10-6069.1.
The use of toxic bait to kill adult Aedes albopictus is a safe and potentially effective alternative to the use of synthetic chemical insecticides. This study was carried out to determine effective concentrations of boric acid needed in sugar bait solutions applied to plant surfaces, and to determine its residual effect in reducing adult mosquito densities. In outdoor tests in 1,100-m3 screened enclosures, landing rates of Ae. albopictus on a human subject and the number of female mosquitoes in mechanical traps were significantly reduced by a 1% boric acid bait compared with the other tested concentrations (0.25%, 0.50%, and 0.75%) and untreated control. Studies of the duration of boric acid activity on plant surfaces were made in 1.4-m3 cages in the laboratory and outdoors in 78-m3 screened enclosures. In the laboratory tests, 1% boric acid bait resulted in >96% mortality in male and female Ae. albopictus for 14 days, whereas in outdoor tests, mosquito landing rates in the treated enclosures were significantly lower than in the control enclosures for 7 days. Also, mosquito mortality responses to boric acid baits between plants with flowers and nonflowers (1.4-m3 cages in the laboratory) were not significantly different. The results of this study suggest that boric acid baits applied to plant surfaces may provide specific data related to the development of an effective point-source-based adjunct/alternative to the use of conventional adulticides for mosquito control.
使用毒饵杀灭白纹伊蚊成虫是一种安全且可能有效的替代合成化学杀虫剂的方法。本研究旨在确定施用于植物表面的糖饵溶液中所需硼酸的有效浓度，并确定其在降低成虫蚊子密度方面的残留效果。在1100立方米的纱网围隔中进行的室外试验中，与其他测试浓度（0.25%、0.50%和0.75%）及未处理对照相比，1%硼酸饵显著降低了白纹伊蚊在人体上的着陆率以及机械诱捕器中雌蚊的数量。在实验室1.4立方米的笼子和室外78立方米的纱网围隔中研究了硼酸在植物表面的活性持续时间。在实验室试验中，1%硼酸饵在14天内导致白纹伊蚊雌雄成虫死亡率>96%，而在室外试验中，处理过的围隔中的蚊子着陆率在7天内显著低于对照围隔。此外，在有花植物和无花植物之间（实验室1.4立方米的笼子），蚊子对硼酸饵的死亡率反应没有显著差异。本研究结果表明，施用于植物表面的硼酸饵可能为开发一种有效的基于点源的辅助/替代方法以替代使用常规杀虫剂控制蚊子提供具体数据。
