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- Use: Broad-spectrum, protective (non-systemic) fungicide widely used to control foliar diseases (blights, spots, molds, mildews) on vegetables, potatoes, peanuts, fruits, turf, and ornamentals.
- Conclusion: Chlorothalonil is a cornerstone fungicide for preventative disease control in many crops due to its broad efficacy and multi-site mode of action (resistance management), but its classification as a probable human carcinogen, high toxicity to fish and amphibians, and environmental persistence have resulted in significant regulatory restrictions and bans in key markets (like the EU).