Plant Disease (2018) 102, p. 240 (Mathew et al.)

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F.M. Mathew, T.J. Gulya, J.G. Jordahl and S.G. Markell (2018)
First report of stem disease of soybean (Glycine max) caused by Diaporthe gulyae in North Dakota
Plant Disease 102 (1), 240-240
Abstract: During 2012, soybean plants (Glycine max) grown in North Dakota were observed with symptoms of reddish-brown stem cankers (~60 mm length). Incidence of infected stems was estimated in excess of 95% in parts of the field. The fungi Diaporthe caulivora (isolation frequency = 100% of stems) and Diaporthe gulyae (isolation frequency = 10% of stems) were recovered from the diseased plants. The identification was based on morphological characteristics and DNA sequence analysis. Pathogenicity of the isolates was demonstrated by inoculation and re-isolation.
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Full text of article
Database assignments for author(s): Thomas J. Gulya, Samuel G. Markell

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Diaporthe caulivora Soybean (Glycine max) U.S.A. (mid N)
Diaporthe gulyae Soybean (Glycine max) U.S.A. (mid N)