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2,4-D

  • 2,4-D is a widely used herbicide that controls broadleaf weeds.
    • 2,4-D has been used as a pesticide since the 1940s.
       
  • 2,4-D is used to control broadleaf weeds in many places including:
    • a variety of field, fruit and vegetable crops, and
    • turf, lawns, rights-of-way, aquatic sites and forestry sites.
       
  • The growth of citrus plants can be regulated by using 2,4-D.
     
  • Products are sold in liquid, dust, or granule formulations. The liquid forms may be concentrated or ready-to-use.
     
  • 2,4-D products can be safely used by following label directions.
    • The toxicity of 2,4-D depends on its chemical forms, including salts, esters, and an acid form.
      • 2,4-D generally has low toxicity for humans, except certain acid and salt forms can cause eye irritation.
      • Swimming is restricted for 24 hours after application of certain 2,4-D products applied to control aquatic weeds to avoid eye irritation.
    • 2,4-D generally has moderate toxicity to birds and mammals, is slightly toxic to fish and aquatic invertebrates, and is practically nontoxic to honeybees.
      • The ester forms of 2,4-D can be highly toxic to fish and other aquatic life.
      • Carefully follow label directions to avoid harmful effects.
         
  • 2,4-D is not Agent Orange.
    • Agent Orange was a mixture of two different herbicides 2,4,5-T and 2,4-D (as well as kerosene and diesel fuel).
    • 2,4,5-T contained high levels of dioxin, a contaminant, found to cause cancer and other health problems in people.
    • 2,4-D does not contain any detectable levels of dioxin. 
    • EPA has canceled all uses of 2,4,5-T in 1985 and no longer allow its use in the United States.
       
  • We have been evaluating the safety of 2,4-D
    • 2005 - comprehensive review
    • 2012 - evaluated new state-of-the-art reproductive studies, and requests in a petition
    • 2014 – evaluated the choline salt of 2,4-D in response to a company’s request to modify the registration.
       
  • 2,4-D and the related compounds are currently undergoing registration review, a program that re-evaluates all pesticides on a 15-year cycle.

Additional Information