Canadian Journal of Plant Pathology (2012) 34, 448-454

Y.N. Jiang, J.S. Haudenshield and G.L. Hartman (2012)
Characterization of Pythium spp. from soil samples in Illinois
Canadian Journal of Plant Pathology 34 (3), 448-454
Abstract: Pythium root rot is widely distributed in major soybean (Glycine max) production areas throughout the world. There are many species of Pythium described on soybean and other crops, although not all species are pathogenic on these crops. The objectives of this study were to isolate and identify Pythium isolates obtained from field soils across Illinois and evaluate their pathogenicity on soybean seedlings. Soil samples were collected from 12 corn-soybean rotation fields in six Illinois counties. All isolates of Pythium were recovered through a baiting technique, identified to the species taxon using morphological and molecular techniques, and evaluated using an in vitro pathogenicity assay on soybean seedlings. Twenty-seven species of Pythium were identified, and P. cryptoirregulare, P. irregulare, P. sylvaticum, P. ultimum var. sporangiiferum and P. ultimum var. ultimum were highly pathogenic on soybean seedlings.
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Link to article at publishers website
Database assignments for author(s): Glen L. Hartman

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Globisporangium ultimum	Soybean (Glycine max)	U.S.A. (mid N)
	Globisporangium irregulare	Soybean (Glycine max)	U.S.A. (mid N)
	Globisporangium sylvaticum	Soybean (Glycine max)	U.S.A. (mid N)
	Globisporangium cryptoirregulare	Soybean (Glycine max)	U.S.A. (mid N)