Nick Christians
April 23, 2013
About once a decade, we get just the right weather conditions
to cause a serious loss of Poa annua during
the winter. This was not the year in
central Iowa. Our bentgrass and Poa appear to be recovering very will
this spring. However, I am getting some
contacts from the Chicago area and Wisconsin indicating that they are seeing
some Poa loss. This apparently happened this spring after
snow cover melted. The following
pictures are from Marc Davison of Green Bay country club in Wisconsin. The first one shows ball sized spots of Poa on the green that are dead, while
the surrounding bentgrass is healthy.
The second picture shows a green with healthier grass in swales where
snow cover persisted longer than on other parts of the green. Evidently, the snow protected the turf, while
exposed areas lost Poa. This would require just the right spring
weather conditions. My guess is that the
Poa began to green up earlier than
the bent. Then there was some wet
weather, followed by a quick freeze that selectively killed the Poa. That
is just a speculation at this point, but it seems to make sense from
discussions that I have had with other superintendents in that region who lost Poa.
No comments:
Post a Comment