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Toxicity and horizontal transfer of bifenthrin and dimefluthrin against the red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), and the efficacy of their dust applications in the field
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| LIANG Ming-rong1*, SHUANG You-ming2*, DENG Jie-fu1, PENG Li-ya2, ZHANG Sen-quan2, ZHANG Chen2, XU Yi-juan1, LU Yong-yue1, WANG Lei1# |
1 Red Imported Fire Ant Research Center, South China Agricultural University, Guangzhou 510642, P.R.China
2 Shenzhen Agricultural Science and Technology Promotion Center, Shenzhen Administration for Market Regulation, Shenzhen 518057, P.R.China
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摘要
红火蚁Solenopsis invicta是一种严重威胁入侵地生物多样性、农林业生产和公共安全的危险性害虫。目前，红火蚁的防治药剂主要分为毒饵和触杀性粉剂两种类型。毒饵对红火蚁的防控效果虽然较彻底，但是见效慢，一般2周左右才能达到理想的防效。触杀性粉剂见效快，施药后3-5天即可达到理想效果，适合应用于红火蚁的紧急扑灭。为筛选出更多可用作触杀性粉剂的有效成分，本文开展了联苯菊酯和四氟甲醚菊酯对红火蚁的毒力、水平传递毒性及其触杀性粉剂的田间防效研究。研究显示，联苯菊酯和四氟甲醚菊酯对红火蚁工蚁的致死中量LD50分别为3.40 ng/头和1.57 ng/头。20 μg mL-1联苯菊酯对红火蚁工蚁的击倒中时KT50和95%击倒时间KT95分别为7.179 min和16.611 min。20 μg mL-1四氟甲醚菊酯对红火蚁工蚁的击倒中时KT50和95%击倒时间KT95分别为1.538 min和2.825 min。联苯菊酯触杀性粉剂和四氟甲醚菊酯触杀性粉剂在蚁群间具有良好的水平传递毒性。0.25、0.50 和1.00% 联苯菊酯触杀性粉剂处理48小时后，第一次继发传递毒性的受药蚁的死亡率（二级死亡率）和第二次继发传递毒性的受药蚁的死亡率（三级死亡率）均超过了80%。0.25、0.50 和1.00% 四氟甲醚菊酯触杀性粉剂处理48小时后，第一次继发传递毒性的受药蚁的死亡率超过了99%，但是第二次继发传递毒性的受药蚁的死亡率则低于20%。野外结果显示，1.00%联苯菊酯触杀性粉剂和1.00%四氟甲醚菊酯触杀性粉剂处理14天后，对红火蚁蚁群的综合防效分别为95.87%和85.70%，防治效果较好。
Abstract
The red imported fire ant, Solenopsis invicta Buren, poses a significant threat to biodiversity, agriculture, and public health in its introduced ranges. While chemicals such as toxic baits and dust are the main methods for S. invicta control, toxic baits are slow, requiring approximately one or two weeks, but dust can eliminate the colony of fire ants rapidly in just three to five days. To explore more active ingredients for fire ant control using dusts, the toxicity of bifenthrin and dimefluthrin, the horizontal transfer of bifenthrin and dimefluthrin dust and their efficacy in the field were tested. The results showed that the LD50 (lethal dose) values of bifenthrin and dimefluthrin were 3.40 and 1.57 ng/ant, respectively. The KT50 (median knockdown time) and KT95 (95% knockdown time) values of a 20 μg mL–1 bifenthrin dose were 7.179 and 16.611 min, respectively. The KT50 and KT95 of a 5 μg mL–1 dimefluthrin dose were 1.538 and 2.825 min, respectively. The horizontal transfers of bifenthrin and dimefluthrin among workers were effective. The mortality of recipients (secondary mortality) and secondary recipients (tertiary mortality) were both over 80% at 48 h after 0.25, 0.50 and 1.00% bifenthrin dust treatments. The secondary mortality of recipients was over 99% at 48 h after 0.25, 0.50 and 1.00% dimefluthrin dust treatments, but the tertiary mortality was below 20%. The field trial results showed that both bifenthrin and dimefluthrin exhibited excellent fire ant control effects, and the comprehensive control effects of 1.00% bifenthrin and dimefluthrin dusts at 14 d post-treatment were 95.87 and 85.70%, respectively.
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Received: 31 May 2022
Accepted: 04 November 2022
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This study is supported by the Special Project for Sustainable Development Science and Technology of Shenzhen, China (2021N007), and the Special Project for Red Imported Fire Ant Management, Shenzhen Agricultural Science and Technology Promotion Center, China (20220900044zbzjbc).
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| About author: LIANG Ming-rong, E-mail: 1511857642@qq.com; SHUANG You-ming, E-mail: 775816881@qq.com; #Correspondence WANG Lei, Mobile: +86-13265045424, E-mail: leiwang@scau.edu.cn
* These authors contributed equally to this study. |
Cite this article:
LIANG Ming-rong, SHUANG You-ming, DENG Jie-fu, PENG Li-ya, ZHANG Sen-quan, ZHANG Chen, XU Yi-juan, LU Yong-yue, WANG Lei.
2023.
Toxicity and horizontal transfer of bifenthrin and dimefluthrin against the red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), and the efficacy of their dust applications in the field
. Journal of Integrative Agriculture, 22(5): 1465-1476.
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