Nov 13, 2022
EPA extends comment period on cancelation of pentachloronitribenzene

The EPA granted a 45-day extension to the comment period on a Proposed Final Decision for pentachloronitrobenzene (PCNB), the active ingredient in AMVAC’s Blocker. The extension for comments to Friday, Jan. 6, came at the request of the National Potato Council (NPC) and other industry groups.

“We appreciate that the agency has provided our industry with additional time to assess the impact of controlling multiple pathogens in potato production without this product. The loss of any tool used to deliver a quality product to the marketplace needs time to determine the impact on the industry,” stated Bob Mattive, NPC vice president of environmental affairs.

Growers are encouraged to provide NPC with information on the use of Blocker by their operations by taking a quick survey found at

– National Potato Council


75 Applewood Dr. Ste. A
P.O. Box 128
Sparta, MI 49345


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