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Preference and Toxicity of Sulfoxaflor, Flupyradifurone, and Triflumezopyrim Bait against the Fire Ant Solenopsis invicta (Hymenoptera: Formicidae) and Their Efficacy under Field Conditions

Jiefu Deng,Mei Yi,Mingrong Liang,D. Tan,Weihui Bai,Cai Wang,Guiying Liu,Yijuan Xu,Yixiang Qi,Yongyue Lu,Lei Wang

Published 2024 in Insects

ABSTRACT

Simple Summary The red imported fire ant Solenopsis invicta Buren poses a significant threat to biodiversity, agriculture, and public health in its introduced ranges. Chemicals are the main methods for S. invicta control. To explore more active ingredients for fire ant control, the toxicity and horizontal transfer effects of sulfoxaflor, triflumezopyrim, and flupyradifurone baits against S. invicta were determined and their field effects were assessed. Sulfoxaflor, flupyradifurone, and triflumezopyrim did not have affect the feeding behavior of the fire ants. However, they significantly reduced the climbing, walking, and arrest abilities of the fire ant workers after 10 days of treatment, and their toxicities were horizontally transferred from workers to alates or larvae. Specifically, the field trials showed that sulfoxaflor and triflumezopyrim at 0.05% concentration were the most effective in exterminating fire ants. The mortality rates of the mounds on Day 28 were 81.21% and 84.44% in 1.5- and 2.0-times 0.05% sulfoxaflor-treated plots, and the mortality rates of the mounds on Day 28 were 83.51% and 82.50% in 1.5- and 2.0-times 0.05% triflumezopyrim-treated plots.

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