Plant Disease (2002) 86, p. 919 (Gulya)

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T.J. Gulya (2002)
First report of cross-infectivity of Plasmopara halstedii from marshelder to sunflower
Plant Disease 86 (8), 919-919
Abstract: During 1999, marshelder (Iva xanthifolia) plants growing in North Dakota, USA were observed with symptoms of chlorotic leaves and white sporulation on the abaxial surfaces. The fungus Plasmopara halstedii was isolated from the diseased plants. The identification was based on morphological characteristics. Pathogenicity of the isolates was demonstrated by inoculation of sunflowers.
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Database assignments for author(s): Thomas J. Gulya

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation

Pest and/or beneficial records:

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

Plasmopara halstedii U.S.A. (mid N)
Cyclachaena xanthifolia (weed) U.S.A. (mid N)