Insecticides for Vector Control: History, Classes, Modes of Action, and Resistance Mechanisms

This comprehensive slide deck provides a foundational overview of the role of chemical interventions in public health entomology. It is designed for university-level instruction and professional development for vector control personnel. The resource tracks the evolution of insecticide use from early environmental management and inorganic toxins to the development of modern synthetic classes.Key Topics Covered:Historical Context: The transition from the DDT era and the "Silent Spring" environmental movement to modern Integrated Vector Management (IVM).Chemical Classes & Modes of Action: Detailed biochemical breakdowns of major insecticide classes, including:Neurotoxins: Organochlorines, Organophosphates, Carbamates, Pyrethroids, and Neonicotinoids.Metabolic Disruptors: Pyrroles and mitochondrial inhibitors.Growth Regulators (IGRs): Juvenile hormone mimics and chitin synthesis inhibitors.Biological Larvicides: Bacillus thuringiensis israelensis (Bti) and fungal pathogens like Beauveria bassiana.Resistance Mechanisms: A deep dive into the physiological drivers of resistance, including target-site mutations (kdr), metabolic detoxification (P450s, GSTs), penetration resistance (cuticular changes), and behavioral avoidance.The Future of Vector Control: Strategies for mitigating resistance through chemical rotation, novel discovery, and ecological-based control measures.