Objective To evaluate the killing effect of unmanned aerial vehicle (UAV) spraying at different locations in residential areas against mosquitoes by the hanging cage method, so as to provide a reference method for the evaluation of mosquito control effect by spraying on site, and to provide a basis for the prevention and control of mosquitoes and mosquito-borne diseases. Methods Two residential areas (villages) were selected in Pujiang County, Zhejiang Province, China. The mosquito cages for feeding containing Aedes albopictus were hanging in various scenes such as the open environment on the ground, sparse branches, and under dense trees, and all the locations were under the UAV spraying. The mortality rate of Ae. albopictus in mosquito cages at different locations at different time points was calculated and compared with that in the control cages by the Chi-square test and Fisher's exact test. Results After the UAV spraying, for the sensitive strains of Ae. albopictus, all were killed within 2.5 h in the open environment; on sparse branches, the mortality rate reached 90.21% at 2.2-2.5 h, 94.89% at 4.5-5.0 h, and the highest (99.15%) at 10.0 h; under dense trees, the mortality rate reached 82.74% at 2.2-2.5 h, 91.15% at 4.5-5.0 h, and the highest (96.02%) at 10.0 h; the highest mortality rates of mosquitoes in the three environments were in descending order, without significant differences (P=0.190). For the local populations of Ae. albopictus, the mortality rate reached 77.63% within 2.2-2.5 h and 94.74% at 4.5-5.0 h in the open environment. Conclusions The hanging cage method is an effective method to evaluate the killing effect of UAV spraying against mosquitoes. The UAV spraying shows a good killing effect on Ae. albopictus in cages in the open environment, on sparse branches, and under dense trees. The UAV spraying is an effective adult mosquito killing method in the urban residential environment.
GUO Yu-hong, LIN Jun-fen, HUANG Wen-zhong, GUO Song, MENG Feng-xia, WU Hong-zhao, LIU Xiao-bo, WU Yu-yan, LU liang, YAN Dong-ming, HOU Juan, GONG Zhen-yu, ZHANG Rong, CHEN En-fu, LIU Qi-yong
. Killing effect of unmanned aerial vehicle spraying at different locations against Aedes albopictus： A study based on the hanging cage method[J]. Chinese Journal of Vector Biology and Control, 2024
, 35(6)
: 652
-656
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DOI: 10.11853/j.issn.1003.8280.2024.06.005
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