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Article Synopsis
- Organophosphate (OP) and carbamate (CM) insecticides are common in U.S. agriculture and harmful to aquatic life, with one amphipod population showing signs of genetic resistance to the OP chlorpyrifos.
- A study examined 17 amphipod populations in California, finding phenotypic resistance to chlorpyrifos only in those from agricultural or urban areas, indicating stronger pesticide impact in farming.
- The research identified a specific genetic mutation (G119S) associated with resistance, as well as potential gene duplication, suggesting that these amphipods are evolving to survive against various insecticides used in their environments.