Incidence of Pythium Blight on Perennial Ryegrass Turf, Rutgers University, 2014
Dr. Bruce Clarke
Center for Turfgrass Science
New Brunswick, NJ
Objective:Conducted The evaluation of fungicide efficacy on controlling Pythium Blight on Perennial Ryegrass Turf.
Fungicides were applied to plot areas on June 27, July 1, July 4, July 11, July 18, and July 25.
Irrigation was implemented following the applications. The study included both conventional and biological
fungicides as well as combination applications. Companion Biological Fungicide was applied at 6.0 fl. oz. both
by itself, and also with TKO Phosphite (0-29-26) at 5.0 fl. oz. per 1,000 ft2, on a 14 day application schedule.
The conventional fungicides Subdue MAXX 2ME & Heritage 50WG were applied at 1.0 fl. oz. and 0.4 fl. oz. per
1,000 ft2 respectively.
Observations were taken incrementally on assessment dates following the applications; June 30,
July 2, July 6, July 13 and July 26. The percentage of diseased plot area values were calculated using the
mean of four replicates from each plot. Companion, applied alone, reduced Pythium blight by 50% and
displayed even more efficacy when used in conjunction with TKO Phosphite (0-29-26) with a reduction of 70%
compared to the Untreated Control (outperforming both traditional fungicides).
Companion® is a registered trademark of Growth Products, Ltd., Banner Max ® is a registered trademark of Syngenta Group Company, Eagle® is a registered trademark of Dow AgroSciences LLC, Heritage® is a registered trademark of Syngenta Group Company.