Info source:
One prevalent myth is that organic agriculture does not employ pesticides. Organic farming does use insecticides and fungicides to prevent predation of its crops.
More than 20 chemicals (mostly containing copper and sulfur) are commonly used in the growing and processing of organic crops and are acceptable under U.S. organic rules.
They include nicotine sulfate, which is extremely toxic to warm-blooded animals, and rotenone, which is moderately toxic to most mammals but so toxic to fish that it's widely used for the mass poisoning of unwanted fish populations during restocking projects.
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