First Report of Virulence Phenotypes of Puccinia helianthi, Causal Agent of Sunflower Rust in Illinois.

@article{Bradley2010FirstRO,
  title={First Report of Virulence Phenotypes of Puccinia helianthi, Causal Agent of Sunflower Rust in Illinois.},
  author={C. Bradley and N. Pataky and T. Gulya and A. Friskop and J. Jordahl and S. Markell},
  journal={Plant disease},
  year={2010},
  volume={94 2},
  pages={
          273
        }
}
Sunflower rust caused by Puccinia helianthi (Schw.) is an autoecious and macrocyclic rust that occurs on wild perennial, wild annual, and cultivated sunflower species (Helianthus annuus L.). Severe epidemics of sunflower rust can significantly reduce yield and quality of cultivated sunflower (4). Uredinia of P. helianthi were observed in individual sunflower fields in four Illinois counties in 2008, namely; Champaign, LaSalle, McLean, and Livingston. Leaves with uredinia from each field were… Expand
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