Public Comment Form

DPR 26-006 1,3-Dichloropropene Field Fumigation Method - Tree-hole Method

On October 30, 2026, the Department of Pesticide Regulation (DPR) published a Notice of Proposed Regulatory Action in the California Regulatory Notice Register. The Notice of Proposed Regulatory Action is also available in Spanish.

 

DPR proposes to amend Title 3, California Code of Regulations (3 CCR) sections 6448, 6448.2, 6624, and 6626. DPR also proposes to amend existing document “1,3-Dichloropropene Field Fumigation Requirements, Rev. January 1, 2026” incorporated by reference in sections 6448, 6448.2, 6624, and 6626. The pesticide regulatory program activities affected by the proposal are those pertaining to restricted materials and pesticide use enforcement. In summary, the proposed action allows for the use of 1,3-dichloropropene (1,3-D) to fumigate individual tree-holes (also known as tree planting sites), making permanent the three-year interim approval of the method granted in September 2024. The proposed action also establishes additional restrictions on use of the tree-hole method, including more stringent limits on the number of tree-holes per acre.

 

Comments may be submitted in writing about proposed action. Written comments must be received no later than December 14, 2026. Please submit comments and attachments in the text box below. Alternatively, written comments may also be submitted via U.S. mail. For details, please see the Notice of Proposed Regulatory Action.

 

For additional information about this rulemaking, please visit DPR's website.




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