An insecticidal organophosphate compound used to control parasites and pests on livestock and in beehives.
A synthetic chemical name combining coumarin-related chemistry with phosphorus (phos). The compound was developed in the mid-20th century for agricultural pest control.
Coumaphos was heavily used to treat varroa mites in honeybee colonies, but bees developed resistance to it—a perfect example of how pesticides become less effective over time!
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