Objective To investigate the resistance of Blattella germanica to five commonly used insecticides in the urban area of Nanyang, Henan province, China, and to provide a basis for rational use of insecticides in B. germanica control. Methods The field population of B. germanica was collected from farmers’ markets, restaurants, hotels, supermarkets, and hospitals in Nanyang, and brought back to the laboratory for rearing until the F1 generation. The median knockdown time, knockdown rate, and resistance ratio of the insecticides were determined by the residual film method recommended by WHO, and their resistance was evaluated. Results The field population of B. germanica in Nanyang developed varying degrees of resistance to deltamethrin, beta-cypermethrin, DDVP, temephos, and fenobucarb, with resistance ratios of 12.03, 2.14, 4.18, 247.23, and 3.85, respectively. Conclusion The field population of B. germanica in Nanyang has high resistance to deltamethrin and temephos. Comprehensive control methods and rational use of insecticides are recommended to inhibit and delay the development of insecticide resistance of B. germanica.
LI Feng, CUI Shi-lei, YAN Jing, DING Xin-yang
. An investigation of the resistance of Blattella germanica to commonly used insecticides in Nanyang, Henan province, China[J]. Chinese Journal of Vector Biology and Control, 2021
, 32(4)
: 472
-474
.
DOI: 10.11853/j.issn.1003.8280.2021.04.018
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