دورية
Evidence for Multiple Origins of Knockdown Resistance (kdr) in Spodoptera exigua(Hübna) (Lepidoptera: Noctuidae) From China
| العنوان: | Evidence for Multiple Origins of Knockdown Resistance (kdr) in Spodoptera exigua(Hübna) (Lepidoptera: Noctuidae) From China |
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| المؤلفون: | Zuo, Yayun, Wang, Zeyu, Ren, Xuan, Pei, Yakun, Aioub, Ahmed A A, Hu, Zhaonong |
| المصدر: | Journal of Economic Entomology; August 2022, Vol. 115 Issue: 4 p1279-1284, 6p |
| مستخلص: | The beet armyworm, Spodoptera exigua(Hübna) is a serious agricultural pest that is challenging to control due to resistance to most pesticides, including pyrethroids. This resistance has previously been linked to the knockdown resistance (kdr) mutation (L1014F) of the voltage-gated sodium channel (VGSC) in S. exigua. To better understand the frequencies of the kdrmutation of SeVGSCand identify the evolutionary origins of kdrmutation in S. exigua, seven populations of S. exiguawere collected in China, and partial SeVGSCgenomic sequences for each individual were acquired. The bioassays showed that the survival rates of seven populations of S. exigualarvae exposed to the discriminating dose of beta-cypermethrin (0.05 mg/cm2) ranged from 91.66% to 100%, indicating that all seven populations had evolved resistance to beta-cypermethrin. The frequencies of kdrmutation (CTT to TTT) of SeVGSCof field populations ranged China were from 60% to 89.6%. The CTT to CAT substitution at this coding position resulting in the L1014H (kdr-H) mutation was found in only one individual from the QP18 population. Based on the phylogeny of SeVGSCalleles, it appeared that the kdrmutation in S. exiguapopulations had multiple origins, which has major consequences for pyrethroid effectiveness in the field. Thus, it is recommended to limit the use of pyrethroid and encourage rotation of insecticides with different modes of action for control of S. exiguato alleviate resistance development. |
| قاعدة البيانات: | Supplemental Index |
Full Text Finder | تدمد: | 00220493 1938291X |
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| DOI: | 10.1093/jee/toac075 |