Effects of cultivars and cultural practices on Sclerotinia stem rot of soybean [Sclerotinia sclerotiorum, Whetzelinia sclerotiorum, Glycine max, Wisconsin].

Reference Report for GUA84013325

Title:	Effects of cultivars and cultural practices on Sclerotinia stem rot of soybean [Sclerotinia sclerotiorum, Whetzelinia sclerotiorum, Glycine max, Wisconsin].
Authors:	Grau, C.R., Radke, V.L.
Source:	Plant Dis. 1984. 68(1):56-58.
Abstract:	Sclerotinia stem rot of soybean was studied in naturally infested field plots at 2 locations. Soybean cv. Hodgson and Corsoy were less diseased than Wells, SRF-200, Steele and Asgrow 2656. Disease severity indices (DSI) (0 = no disease, 100 = 100% death) were greater for all cv. planted at row widths of 25-38 cm compared with DSI at row widths of 76 cm for 2 of 3 yr. Yields were lower for soybeans grown at row widths of 25-38 cm than for row widths of 76 cm for all yr. Disease severity was greater in irrigated plots than in plots that were not irrigated either before or after flowering. Yields were improved 10-22% by reducing disease severity through reduced irrigation before the RI growth state (early flowering). Although the amount of precipitation and supplemental irrigation influenced disease severity, air temperatures were also associated with disease development

Funded by the USDA-ARS. Developed by the USDA-ARS SoyBase and Legume Clade Database group at the Iowa State University, Ames, IA

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