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Sunflower Diseases Remain Rare in California Seed Production Fields Compared to North Dakota

T. J. Gulya, S. Rooney-Latham, J. S. Miller, K. Kosta, C. Murphy-Vierra, C. Larson, W. Vaccaro, H. Kandel, and J. F. Nowatzki

December 2012


The majority of United States sunflower production is in seven Midwestern states, but hybrid planting seed is almost exclusively produced in California. Due to the lack of summer rains and furrow irrigation, California-produced seed is relatively disease free and thus it regularly meets phytosanitary restrictions imposed by many countries. For the 15-year period from 1997 to 2011, 7231 seed fields in northern California were inspected and samples processed at the state diagnostic laboratory (California Department of Food and Agriculture).


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