Objective To evaluate the palatability and effectiveness of several rodent baits for deratization in a large farmers' market in Beijing, China. Methods The rodent density and population distribution in this market were monitored and investigated before and after deratization by using the rodent trace method and night trapping method in May 2021. An on-site investigation of the palatability of several rodent bromadiolone baits was conducted. A rank sum test was used to analyze the difference in palatability to select the best bait for deratization. Results Before deratization, the mean positive infestation rate and the capture rate of rodents were 32.6% and 25.3% in the farmers' market. The places with relatively high rodent densities included the garbage collection area, dry fruit area, and grain, oil, and eggs area, where the capture rates were 69.0%, 43.0%, and 30.0%, respectively. The intakes of No. 2 and No. 3 baits (combination formulations of 0.5% bromadiolone mother liquor with different proportions of corn kernels, raw peanuts, sweet potatoes and apples) were significantly higher than those of No 1 (combination formulations of 0.5% brodiolone mother liquor with corn kernels, raw peanuts) and No 4 (commodity, 0.005% bromadiolone bait pellets) (Z1,2=-4.159, Z1,3=-4.158, Z2,4=-4.168,Z3,4=-4.167, all P<0.001). There was a statistical difference in the intakes of No. 1 and No. 4 baits (Z=-3.367, P=0.001). No statistical difference was observed in the intakes of No. 2 and No. 3 baits (Z=-0.110, P=0.272). No. 3 bait showed statistically better consumption rates than No. 2 bait in various areas. After deratization with No. 3 bait, the rodent capture rate in the farmers' market was statistically decreased to 0.9%. Conclusion The density of rodents in the farmers' market was high before deratization, and was statistically reduced after eliminating rodent habitats and deratization with the selected No.3 rodent baits. Improving the palatability of baits can enhance rodent control.
GUO Yu, WU Qing-rui, LIU Mei-de, LIU Yuan, YAN Shuai, LI Ruo-xi
. Palatability and deratization effectiveness evaluation of rodent baits in a large farmers' market in Beijing, China[J]. Chinese Journal of Vector Biology and Control, 2022
, 33(4)
: 521
-524
.
DOI: 10.11853/j.issn.1003.8280.2022.04.015
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