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Pesticide immunotoxicity on insects - Are agroecosystems at risk?
Fabrizio Lisi1, Marcel Amichot2, Nicolas Desneux2
1University of Catania, Department of Agriculture, Food and Environment, via Santa Sofia 100, 95123 Catania, Italy.
The Science of the Total Environment
|August 18, 2024
Summary
Sublethal pesticide exposure affects insect immunity, with some pesticides suppressing responses and others boosting them. Understanding these secondary effects is crucial for ecosystem health and integrated pest management.
Area of Science:
- Environmental Toxicology
- Insect Immunology
- Pesticide Science
Background:
- Growing concern over non-target, sublethal effects of pesticides on insect behavior and physiology.
- Traditional research often overlooks secondary mechanisms of pesticide action, focusing primarily on direct toxicity.
- Insect immune systems are critical for survival and are increasingly recognized as targets of pesticide exposure.
Purpose of the Study:
- To review the immunomodulatory effects of sublethal pesticide exposure on insect immune systems.
- To explore the diverse impacts of different pesticide classes on insect immunocompetence.
- To highlight the significance of pesticide mixtures and secondary modes of action on insect immunity.
Main Methods:
- Literature review synthesizing recent research on pesticide effects on insect immunity.
- Analysis of studies investigating both target and non-target insect species.
- Examination of findings related to specific pesticide classes (neonicotinoids, organophosphates, IGRs) and their immunomodulatory properties.
Main Results:
- Sublethal pesticide exposure exhibits varied effects: neonicotinoids generally suppress immune responses.
- Certain organophosphates and insect growth regulators (IGRs) can enhance immunocompetence under specific conditions.
- Synergistic effects of pesticide mixtures on insect immunity are a significant area of emerging research.
Conclusions:
- Pesticide exposure significantly modulates insect innate immunity through both direct and indirect mechanisms.
- Understanding these immunomodulatory effects is vital for assessing risks to beneficial insects, pollinators, and ecosystem stability.
- Further research into pesticide secondary modes of action is needed for effective integrated pest management strategies.
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