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PHOTO A: The green depressions on the first cut of rough are a result of excessive levels of plant growth regulator. While applying a PGR to this golf course, the spray rig’s nozzle and nozzle body were knocked off during transport, producing a steady flow of PGR from the damaged boom. Since the fairways were creeping bentgrass, they showed no real damage from the high rates of application; in fact, the areas turned dark green. However, the Kentucky bluegrass rough areas that received the same high rate of PGR experienced substantially slowed growth and turned brown in a straight line, also causing the green depression.
Photo courtesy of Steven McDonald, a seven-year GCSAA member who is the assistant superintendent at Philadelphia Country Club and a consultant for Turfgrass Disease Solutions LLC. Michael McNulty is the Class A superintendent at Philadelphia CC and a 21-year member of GCSAA. |