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United States Department of Agriculture

Agricultural Research Service

Title: Use of Seed Mixtures of Rhizoctonia-Resistant and Susceptible Sugarbeet Varieties for Control of Crown and Root Rot: Effects on Yield and Disease Occurrence

Authors
item Halloin, John
item Johnson, David - MICHIGAN ST UNIVERSITY
item Poindexter, Steve - MICHIGAN ST UNIVERSITY

Submitted to: Saginaw Valley Bean and Beet Farm Report
Publication Type: Experiment Station
Publication Acceptance Date: May 26, 2000
Publication Date: N/A

Technical Abstract: Commercial sugarbeet varieties with resistance to crown and root rot caused by Rhizoctonia are available; however, these varieties provide lower yields than susceptible varieties. Field tests were conducted to determine if use of mixtures of resistant and susceptible varieties could be used to minimize the losses due both to disease and to use of the resistant varieties. Yield losses associated with the resistant varieties were negligible when mixtures contained 1/6 or 1/3 of the resistant variety. Conversely, these same mixtures provided significant reductions in disease severity. Growers may benefit from reduction of disease severity and enhanced yields when using mixtures containing approximately 1/5 to 1/4 of the resistant variety under conditions where severe crown and root rot is anticipated.

Last Modified: 7/23/2014
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