SoyBase Follow us on Twitter @SoyBaseDatabase
Integrating Genetics and Genomics to Advance Soybean Research



Reference Report for IND89011031
Title:Epidemiology of Sclerotinia stem rot of soybean in Ontario.
Authors:Boland, G.J., Hall, R.G.
Source:Phytopath. 1988, 78(9):1241-1245
Abstract:The epidemiology of Sclerotinia stem rot of soybean in Ontario was investigate in 1981 and 1982. Apothecia of Sclerotinia sclerotiorum appeared after the development of a crop canopy during mid to late July and were present for 5-6 wk thereafter. Soil matric potentials were generally greater than or equal to -5 bars during the 2 wk preceding the occurrence of apothecia. Epidemics started in early to mid August and continued until near crop maturity, Disease first appeared after closure of the crop canopy, after crop flowering had started, after apothecia appeared within the crop, and after rain had initiated periods of plant surface wetness lasting for 40-112 hr. Mean daily air temperatures were in the range of 12-24 C. Disease development required 70-120 hr of continuous plant surface wetness at 20 C in controlled-environment inoculations with ascospore suspensions.






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