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Below are the pesticides with established tolerances (residue limits for pesticides used in the U.S. or by countries exporting to the U.S.) for turmeric. While not all the pesticides on the list are applied to all turmeric, there is no way to tell which pesticides are applied to any given piece of conventional produce on your store shelf. You may consider talking to the farmers at your local farmers market about the pesticides they use, but eating organic is the only way to know for sure.
California Farmworker Poisonings, 1992–2010: Not a major California crop.
Pesticide Tolerances —Health and Environmental Effects: The database shows that while turmeric grown with toxic chemicals show low pesticide residues on the finished commodity, there are 35 pesticides with established tolerance for turmeric, 14 are acutely toxic creating a hazardous environment for farmworkers, 31 are linked to chronic health problems (such as cancer), 7 contaminate streams or groundwater, and 32 are poisonous to wildlife.
Pollinator Impacts: In addition to habitat loss due to the expansion of agricultural and urban areas, the database shows that there are 13 pesticides used on turmeric that are considered toxic to honey bees and other insect pollinators. For more information on how to protect pollinators from pesticides, see Beyond Pesticides' BEE Protective webpage.
(A = acute health effects, C = chronic health effects, SW = surface water contaminant, GW = ground water contaminant, W = wildlife poison, B = bee poison, LT = long-range transport)
All tolerance data is based on the Environmental Protection Agency's Tolerances by Commodity, Crop Group, or Crop Subgroup Index (last updated July 2009). For more information, see our Methodology page.