Posts Tagged ‘winterkill’

It’s in the Genes!

Thursday, May 6th, 2010

This week I attended a conference at Oklahoma State University (go pokes!) on winterkill and spring dead spot. I know it doesn’t sound too exciting for most folks, but that’s what I do—take care of turf. So, I went to see if there was any new information on these two things which have caused me to lose hair every spring over the past 26 years.

Yea, that bermudagrass looks pretty dead, Dr. Martin!

My previous blog was about winterkill. And yes, we sure enough have had some from the winter of 2009/2010. Dr. Dennis Martin, the head of the turfgrass department from O.S.U., showed us the damage they received on their turf plots, spoke about the factors involved in winterkill, along with recommendations on what to do to help bermudagrass turf recover.

It’s always amazed me over the past 26 year when homeowners look at their lawn, and it’s damaged from winterkill, not as green, has a few more weeds, etc, than maybe the lawn across the street. “Why does my lawn look so bad, and Billy Bob across the street doesn’t do anything with his lawn, and look how nice it looks!” We’ve seen some of this with the winterkill event, with some lawns being damaged, even just in certain areas, while other lawns are just fine. (more…)

Winterkill of Bermudagrass

Wednesday, April 28th, 2010

Winterkill along a concrete edge, where soil temperatures were colder. Also, too much ice melt could have caused this.

I recently received a memo from Dr. Dennis Martin, Turfgrass Extension/Research Specialist from Oklahoma State University, concerning winter-kill of bermudagrass. Although it looks like the problem is not as severe as he and others believed it would be, there are areas of turf that have been damaged, or are just slow to come out of dormancy. A recent Tulsa World article also had information about winterkill and the effect it was having on local golf courses.

Even during the mildest of winters in Oklahoma, several node and internode segments of the aerial shoot system of bermudagrsss are killed by freezing temperatures. Sunlight  then bleaches the dead tissue to a straw colored appearance. Following these events and while temperatures remain too low for sustained regrowth, people refer to the bermudagrass as “being dormant.”

The relatively severe winter of 2009/2010 has resulted in above average winter-kill of bermudagrass across Oklahoma. “Winter-kill” simply means that part or all of the turfgrass plant died during the winter season. Winter-kill can occur from either acute or extended exposure to low temperatures. It can also be due to complications from the interaction of low temperatures and any number of stressing factors such as insuffient or excessive soil moisture, shade, excessive traffic, soil compaction, low mowing height, insufficient or excessive nutrients, or any number of other predisposing stressful physical, chemical, or biological factors. (more…)

Whatever Happened to Global Warming?

Sunday, January 10th, 2010

It’s very cold in Tulsa.  It’s been very cold for several weeks now.  The ”Christmas Eve Blizzard” from two weeks ago is still covering many parts of our city and state.  Only today did I see my old lawn that’s been buried under the snow and ice for quite some time.  It’s fescue, so it’s just a little green, but looking kinda frozen after all this cold weather.

My Fescue turf if finally showing some life!

My Fescue turf if finally showing some life!

Bermudagrass is prone to winterkill during harsh Oklahoma winters.  Most situations which cause winterkill are either earlier in fall, when sudden drops in temperatures can sometimes occur before the bermudagrass has had a chance to really harden off and go completely into dormancy.   This occurred way back in 1989, when we had sudden sub-zero temperatures in early December.  The following spring was not pretty!  Most lawns, golf courses, and other bermuda areas had from 30%-80% winterkill.

The more common occurrence is when we have an early spring, and warm temperatures cause the bermudagrass to green-up too soon, only to be hit by a hard frost in early or mid-April.  This has happened several times over the past few years it seems, but not all over the area.  The extent of the winterkill was not nearly as bad as the “big one” in 1989.  With these late spring events, the grass seems to come back quicker also.

I think we made it through this cold snap OK, but you never know until late April or May when the turf greens up.  Temperatures were very cold, but did not reach the critical -5 degree area in most areas.  However, I’ve never seen a period where the temperatures remained this cold for several weeks.  It remains to be seen as to how this affected the bermudagrass turf.  It’s a warm-season grass, and the Tulsa ares is on the northern edge of it’s growing area.

Now Fescue will be just fine, since it’s a cool-season turf.  It can tolerate much colder temperatures.  We’re on the southern edge of it’s growing area.  In other words, in Tulsa, it can get too cold for bermuda and too hot for fescue!  Makes it kinda tough sometimes to be in the lawncare business.

This cold weather does make it difficult to get excited about global warming, and believe that it’s as much of an issue as some would lead us to believe.  I’m a old science teacher by trade, so I know that there is some truth to the fact that excess Carbon Dioxide can contribute to the greenhouse effect.  Hey-I taught that to students 25 years ago.  I’m all for clean air and conserving our natural resources.  But I also taught them how effective grass, plants, and trees are in absorbing Carbon Dioxide and releasing Oxygen during the process of photosynthesis and respiration.  Healthy lawns in the urban environment do not get the credit they deserve in contributing to a healthier urban environment, in part by making our air healthier to breath.  That’s what we do at LawnAmerica, and we’re proud of it.  By caring for lawns and landscapes, we’re all doing our part towards a better environment in the urban world we live in.

One of our trucks converted to a snow plow and ice-melt spreader.  It's awsome!

One of our trucks converted to a snow plow and ice-melt spreader. It's awesome!

One good thing about the snow is that it’s given us a chance to try out our new snow plowing equipment.  LawnAmerica is now providing snow and ice control with liquid pre-treating before the event happens, along with plowing after we get snow.  We also have a smaller, but very effective ATV that is equipped with a snow plow to be used  smaller areas such as driveways and small parking lots.  After plowing, we spread a quality granular ice-melt product that is safe for concrete and vegetation.  Contact us at 249-5296 for a quote on getting setup for snow and ice-control.   If the early part of our winter is any indication, I’ll bet we have some more weather events before springtime.