Fungicide Recommended For Common Scab On Potatoes

Fungicide Recommended For Common Scab On Potatoes

AMVAC Chemical Corporation, a subsidiary of American Vanguard Corporation, announces a 2(ee) recommendation for Blocker 4F fungicide for common scab (Streptomyces scabies) on potatoes.


Blocker 4F is a preventative fungicide that can be used as a soil treatment for control of a variety of diseases, including Rhizoctonia stem canker, black scurf, and white mold.

The recommendation for common scab provides growers another tool in their fungicide program. “BLOCKER 4F is the foundation of every potato fungicide program,” says Ron Rowcotsky, AMVAC Blocker product manager. “Blocker 4F is a great stand-alone product to block the advancement of disease through its unique anti-sporulation and multi-site modes of action. It also enhances the performance of a variety of other disease-control products.”

The 2(ee) recommendation for potatoes can be distributed in Colorado, Idaho, Michigan, Minnesota, Montana, Nebraska, Nevada, North Dakota, Oregon, South Dakota, Utah, Washington, Wisconsin, and Wyoming.

For additional information on Blocker 4F and the complete AMVAC portfolio of potato solutions, visit