Flonicamid

Flonicamid (CAS No.: 158062-67-0) is a pyridinecarboxamide-derived small-molecule insecticide widely utilized as a research tool for investigating feeding regulation and ion channel function in hemipteran pests, with emerging relevance in neurophysiological and toxicological studies. It exhibits selective systemic activity by disrupting insect feeding behavior, primarily through inhibition of stylet penetration into plant tissues, leading to starvation without immediate paralysis, a mechanism that distinguishes it from conventional neurotoxic insecticides. At the molecular level, flonicamid has been shown to modulate inward-rectifying potassium channels, such as Kir1 in the brown planthopper, with activity observed in the low micromolar range, and to suppress salivation and sap ingestion in aphid models, reflecting interference with feeding-associated neural and physiological pathways. In vitro and in vivo studies demonstrate toxicity across multiple aphid species, supporting its utility in comparative pharmacology and pest resistance research, while mammalian toxicity remains relatively low, enabling its consideration in safety profiling studies. In biomedical and drug discovery contexts, flonicamid is employed as a probe compound for dissecting ion channel function, feeding-related signaling pathways, and selective toxicity mechanisms, with experimental concentrations and dosing regimens tailored to specific cellular assays or organismal models.