A Lose-Lose Situation
By Bob Vavrek, senior agronomist, North-Central RegionMarch 5, 2014
|A recent thaw provided a brief window of
opportunity to remove ice and snow from putting greens. However, the value of
exposing turf to near zero temperatures without insulation from snow or covers
at a number of courses in the North-Central region have documented at least 60
to 70 days of ice cover beneath a deep layer of snow across localized areas of
putting greens. Research indicates injury to Poa annua is likely to occur under these conditions. Consequently, the
maintenance staff at many facilities that have predominantly Poa annua greens could not resist the
urge to remove snow and ice during a recent brief period of mild weather.
the temperatures plunged to 25 to 30 degrees below normal after the short-lived
thaw and northern states have remained in the deep freeze for a week and
counting. Poaannua exposed to single-digit temperatures during late winter
without insulation from snow cover may be just as likely to experience injury
as the turf suffocated by months of ice cover.
bottom line is that Mother Nature seems intent on making life miserable for
turf this winter regardless of what measures are taken to prevent injury. The
aroma of rotting grass when ice is removed is never a good sign and reports of
putrid smells from putting greens have increased lately. Similarly, plugs of
turf removed from frozen greens earlier this winter appeared healthy when moved
indoors, but only the bentgrass component of the turf seems healthy and
vigorous in recent samples. Only time will tell if affected areas of greens are
truly dead or only mildly stunted by the double whammy of winter stress. We
won’t know the scope or magnitude of turf injury until a sustained period of
mild weather occurs.
we have more control over the factors that facilitate turf recovery versus the
factors that cause winterkill. The Green Section staff will be providing
recipes for recovery should significant turf loss occur. Until then, let’s hope
for the best and prepare for the worst.
Source: Bob Vavrek (firstname.lastname@example.org)
Information on the USGA’s Course Consulting Service
Contact the Green Section Staff