Carrington Research Extension Center

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Fungicide Efficacy Testing Results - Sunflowers

The NDSU Carrington Research Extension Center conducts field trials to evaluate the efficacy of fungicides for the control of rust and Sclerotinia head rot on sunflowers.

RUST

Field trials conducted at the Carrington Research Extension Center have evaluated the optimal timing of fungicide applications for control of rust on sunflowers and the efficacy of fungicides for control of this disease on sunflowers.  

Results:  Carrington 2010 [ illustrated report ], Carrington 2013 [ illustrated | full report ]

SCLEROTINIA HEAD ROT

Field trials conducted by the NDSU Carrington Research Extension Center in Carrington and Oakes have shown little or no fungicide efficacy against Sclerotinia head rot of sunflowers.  The poor disease control results are likely due to the difficulty of obtaining satisfactory fungicide coverage to the desired target (the front of the sunflower head) when fungicide applications are made over the top of the canopy; much better fungicide efficacy against Sclerotinia head rot has been observed in research conducted in Morden, Manitoba where fungicide application methods permitted improved fungicide deposition on the front of sunflower heads.  

Results:  Carrington 2013a [ illustrated | full report ], Carrington 2013b [ illustrated | full report ], Oakes 2013 [ illustrated | full report ].

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