Eck Institute for Global Health and Department of Biological Sciences, University of Notre Dame, Notre Dame, Indiana, U.S.A.
Kenya Medical Research Institute Centre for Global Health Research, Kisumu, Kenya.
Med Vet Entomol. 2021 Jun;35(2):169-176. doi: 10.1111/mve.12482. Epub 2020 Sep 28.
The host decoy trap (HDT) is a surveillance trap that presents a combination of heat, visual and odour stimuli to attract bloodmeal-seeking mosquitoes. Here we employed a semi-field study to demonstrate the role of the visual attributes present on the HDT on the effectiveness of Aedes aegypti capture. Our results show that the HDT is an effective means of capturing Ae. aegypti mosquitoes in semi-field conditions, with a per trial capture rate of up to 69% across four visually distinct HDTs. The solid black coloured HDT captured more mosquitoes than HDTs with black-white stripes, black-white checkerboard patches or solid white colour by a factor of 1.9, 1.7 and 1.5, respectively. In all cases, mosquito capture was not evenly distributed on the HDT surface, with captures on the HDT's outer downwind half, away from the odour delivery, exceeding captures on the inner upwind half. We conclude that the solid black surface of the original HDT design is more effective than the other surfaces (white or black/white patterns) for the capture of Ae. aegypti. Our results demonstrate that mosquito attraction to the thermal and odorant cues of the HDT is modulated by visual information.
诱蚊诱捕器（HDT）是一种监测诱捕器，它提供了热、视觉和气味刺激的组合，以吸引寻找血餐的蚊子。在这里，我们进行了一项半野外研究，以证明 HDT 上存在的视觉属性在捕获埃及伊蚊方面的有效性。我们的结果表明，HDT 是在半野外条件下捕获埃及伊蚊的有效手段，在四个具有不同视觉特征的 HDT 中，每次试验的捕获率高达 69%。与具有黑白条纹、黑白棋盘斑块或纯色的 HDT 相比，纯黑色的 HDT 捕获的蚊子数量分别多了 1.9 倍、1.7 倍和 1.5 倍。在所有情况下，蚊子的捕获都不是均匀分布在 HDT 表面上，下风半部分（远离气味散发处）的捕获量超过上风半部分。我们得出结论，原始 HDT 设计的纯黑色表面比其他表面（白色或黑白图案）更有效地捕获埃及伊蚊。我们的结果表明，蚊子对 HDT 的热和气味线索的吸引力受到视觉信息的调节。
