Phytopathology (1996) 86, p. S59 (Olah et al.)

A.F. Olah and A.F. Schmitthener (1996)
Yield loss in soybean inoculated with sclerotial fragments of Sclerotinia sclerotiorum
Phytopathology 86 (11 suppl.), S59-S59
Abstract: Sclerotia of Sclerotinia sclerotiorum were ground to pass a 40-mesh sieve, mixed with 2% sucrose in water and sprayed on more than 200 flowering soybean varieties at 4 locations in the Northcentral region during 1995 and these data compared to 7 additional locations that had natural infection. No or very few white mold symptoms were seen at harvest. Regression analysis of percent yield loss of inoculated plots on disease-free controls indicated that high-yielding varieties or varieties grown under high-yield conditions had the highest percent yield decrease whereas lower yielding varieties had a yield increase. In experiments where disease symptoms were present, there was a poor correlation between disease incidence and yield. These results were similar to those found with ascospore-sprayed or naturally-infected plots during 1994.

Research topic(s) for pests/diseases/weeds:
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sclerotinia sclerotiorum	Soybean (Glycine max)	U.S.A. (mid S)