State Considers New Restrictions on 1,3-D

October 18, 2019

The California Department of Pesticide Regulation (DPR) held a workshop on October 17, 2019 to explore additional measures to protect bystanders and residents from acute (short-term) inhalation exposures to 1,3-dichloropropene (1,3-D). 1,3-D is a pre-plant fumigant used to control insects, nematodes, and other organisms in the soil that threaten a variety of crops including nut trees, berries, sweet potatoes, and grapes. It is commonly injected into the soil or applied through drip irrigation.

The DPR workshop discussion included the acute 1,3-D regulatory target concentration, possible 1,3-D mitigation measures, and timing for implementation. The workshop also provided time to answer questions and hear suggestions for alternative approaches that would be equally effective in reducing acute exposure to 1,3D.

Workshop Materials:

Supporting Scientific Documents:

1,3-D is a toxic air contaminant and a "restricted material" that requires a permit from the county agricultural commissioner prior to its application. In addition, applications of 1,3-D must be recommended by a licensed pest control advisor and supervised by a licensed certified applicator.

Further information will be posted as it becomes available.

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