Objective To investigate the resistance of Rattus norvegicus to first and second generation anticoagulant rodenticides in Shenzhen, provide science evidence to choose rodenticides in deratization. Methods Test rats were caught by mousetrap from residential area in 4 municipal districts of Shenzhen city in 2017. Non-selective feeding trial was used in this study, the poison bait contained 0.005% warfarin and 0.005% bromadiolone. Excel software was used for data input and collating, SPSS 16.0 software was used for statistic description and statistical analysis. Results Warfarin-and bromadiolone-resistant individuals were not detected in all 245 rodents. The average lethal dose of warfarin was 9.87 mg/kg, and the average time of poisoning symptoms appearing and death was 3.06 d and 4.48 d respectively. The average lethal dose of bromadiolone was 10.69 mg/kg, and the average time of poisoning symptoms appearing and death was 3.32 d and 4.82 d respectively. The lethal dose had significant difference between different collection sites. Conclusion Although R. norvegicus are susceptible to warfarin and bromadiolone in Shenzhen at present, the possibility of resistant development still exists. Deratization procedure normalization and well-palatability rodenticides should be considered to enhance chemical control effectiveness.
LIU Yang, ZHANG Shao-hua, LIANG Zhuo-nan, ZHU Yi-chao, LIANG Gui
. Study on resistance of commensal rats (Rattus norvegicus) to anticoagulant rodenticides in Shenzhen[J]. Chinese Journal of Vector Biology and Control, 2018
, 29(6)
: 617
-620
.
DOI: 10.11853/j.issn.1003.8280.2018.06.016
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