Phomopsis Stem Canker: A Reemerging Threat to Sunflower (Helianthus annuus) in the United States.

  title={Phomopsis Stem Canker: A Reemerging Threat to Sunflower (Helianthus annuus) in the United States.},
  author={Febina M. Mathew and Kholoud M. Alananbeh and James G Jordahl and Scott M. Meyer and Lisa A. Castlebury and Thomas J. Gulya and Samuel G. Markell},
  volume={105 7},
Phomopsis stem canker causes yield reductions on sunflower (Helianthus annuus L.) on several continents, including Australia, Europe, and North America. In the United States, Phomopsis stem canker incidence has increased 16-fold in the Northern Great Plains between 2001 and 2012. Although Diaporthe helianthi was assumed to be the sole causal agent in the United States, a newly described species, D. gulyae, was found to be the primary cause of Phomopsis stem canker in Australia. To determine the… CONTINUE READING
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