ARS | Publication request: Optimum Timing for Spraying Out Greenbridge with Roundup to Control Rhizoctonia in Barley

Submitted to: Washington State University College of Agriculture and Home Economics
Publication Type: Abstract Only
Publication Acceptance Date: August 20, 2008
Publication Date: August 20, 2008
Citation: Paulitz, T.C., Schroeder, K.L., Babiker, E., Hulbert, S. 2008. Optimum Timing for Spraying Out Greenbridge with Roundup to Control Rhizoctonia in Barley . Washington State University College of Agriculture and Home Economics. Page 37.

Technical Abstract: A field experiment was conducted in 2007 in a field at the ARS Palouse Conservation Farm with a high level of both R. solani and R. oryzae. Volunteer and weeds were allowed to grow over the winter, and plots were sprayed out with Roundup at 8 wks, 6 wks, 4 wks, 2 wks, 1 wk, and 2 days before planting with barley (var. Baronesse) near the end of April. Disease and plant measurements were taken 3 weeks after planting. Plots sprayed out 2 days or 1 week before planting showed increased disease and less plant growth. The number of tillers and roots increased with earlier spraying times, 2 and 4 wks preplant. Plant height and leaf length were improved with spraying out up to 6 weeks before planting. The optimum time for spraying out greenbridge was 3 weeks before planting for most measured parameters.