Growing Degree Days and Weather

Horticulturists, farmers, and gardeners use growing degree days(GDD) to quantify heat accumulation over a given period to predict plant blooms and pest emergence. I put together this chart for a couple of reasons today. One, it is a great way to visualize where we are today as compared to the last two years when it comes to weather. And two, at IVGC we use it to plan our first chemical application to inhibit poa annua seeding on our greens during the growing season. Using a base temp of 32 degrees F we are waiting to hit the 250 GDD number to apply the first of two pesticide applications. The chart shows how the weather can be extremely different from year to year. I hope we start warming up and accumulating some GDD fast (I say that with snow coming down and starting to accumulate on the turf). It is December right?

2012 GIS & Takehome Tidbits

NOTE: With the new blog format be sure to click on the post so you get the whole entry. Even the most current posting, though a larger format, does not show completely...

A few weeks ago I was looking at this landscape; It was the Golf Industry Show in Las Vegas, NV.  For one week a year the GIS brings people from all areas of golf course operations together to learn, network, and relax a bit.  While over the years the conference/trade show numbers have decreased a bit, there was a super turnout for the 2012 GIS.  With a attendance of almost 15,000 people and 540 exhibitors, the trade show floor was constantly buzzing.

I had two really good seminars, one on management strategies to decrease the amount of Poa annua on the golf course and the other on stress management strategies for cool-season turf.  I came home with some great information as well as some things we are going to implement in our maintenance practices this coming season.

With the last of the greens covers being disposed of (worn out and deteriorated beyond usefulness) we are going to be striving for a greater percentage of bentgrass on our greens and less annual bluegrass.  Not that we have not all ready been doing things to achieve this over the years, we constantly modify and improve our cultural practices to encourage the bentgrass over the bluegrass.  This season we are going to ease into some of the chemical strategies for modifying our populations of turf on greens.  It is something that will take a long time to appreciate because we wish to achieve this with little to no effect on playability.  This is just one of the many things we are working on this season, stay tuned for further details on everything we are looking at this season.

Panorama from the clubhouse roof 03-20-2012.

Yesterday

( 2011_03_22 - #12 Green )

Yesterday Brandon and I went for a walk to see how the water was moving and the ice was melting. There were quite a few greens where we could see a lot of turf and the above picture of #12 green is a good example of what we were seeing. However there were a couple that showed some signs of poa annua death in a very sporadic pattern, greens #16 and #7.

( 2011_03_22 - #16 Green ) 

( 2011_03_22 - #7 Green )

Some of the turf loss is obviously caused by where the water was sitting in the low pockets, the back and center of #16 and the back and front of #7. Weak Annual Bluegrass, freeze/thaw of water, perhaps smothering under ice cover for the entire winter; These are all possibilities of why we lost turf in these areas. I will say it is a bit early to declare the spots completely lost though. When things start to dry and warm we will be able to better determine if there are any living plants in these spots and take the actions we need to take to get the turf back.

It is amazing what changes in 12 hours though. Today we are looking at a blanket of 3-5" of heavy wet snow covering the entire golf course. So when it starts melting off we will be back out making sure the ice is getting broken up and water is moving off the green surfaces. And other then the few spots of potential turf loss, the turf looks pretty good coming out of winter. It appears the snow mold chemicals we used for protection over the winter have worked, and the vole damage is much less then anticipated. Let's hope this is the last blast and spring is right around the corner.

Watering da Turf

( 2010_07_16 - Watering #10 Green )

Over the last month we have had some irrigation issues. Four weeks ago we had one of the main irrigation motors go down and it had to be replaced. We have been running at about half capacity until a week ago, when we installed the new motor and got everything back up and running at 100%. The last few days we have had more issues with low pressure shut downs and the pump house not being able to handle the load. We have tweaked the settings in the computer that controls the irrigation and hopefully have it under control now. Tomorrow morning will give us our answer, if everything runs and there are no more shutdowns then we should be in good shape to finish out the year. We will be updating the wet-well intake in the irrigation pond on #13/14 this winter after we shut the system down. Currently the screen and location of the intake is causing the majority of our problems with the motors and pumps. I would do it now but we would be a week or so without any irrigation water since we would have to drain the pond to do the work. Not to mention digging out firm muck is much easier then slopping out the wet stuff and hauling it away.

The irrigation issues have resulted in some unsightly turf in a few fairways. The annual bluegrass has not taken to being dried out very well. We usually try and walk the fine line of dry but not dry enough to damage the turf. With the night watering not working 100% and day watering only amounting to so much, we have had some poa annua decide enough is enough and die out. The nice thing is we can start cultivating those small patches and try to encourage some good bluegrass, but it is a bit unsightly. Overall it should not effect play too much and things should rebound quickly as we get more water on it and the weather cools a little. The poa annua doesn't really like 90 degree temps with high humidity for any length of time...

I hope everyone has a good weekend and has a chance to get out and play a little bit.

( 2010_07_16 - A View of #5 Green/Approach )

Aerifying

The greens have healed in great after aerifying. Today would be 2 weeks since we pulled cores and filled holes, and the weather has cooperated perfectly. We continue on our plug pulling rampage with tee boxes now. The front nine tees were completed on Tuesday and the back nine will be done tomorrow. Ones in worse shape recieve a little extra tlc with topdressing and seed, the others just get the plugs dragged around and cleaned off.

The fairways as many of you know are solid tine aerified, this creates a hole without pulling out a plug. By not disrupting the fairway surface we leave the poa annua seed in the ground and hopefully deter it from germinating more readily and compete against the desired bluegrass. Solid tines also allow us to get the job complete with less labor involved because there is no need for busting up cores, dragging them in, and cleaning the fairway off with a blower. All we have to do is aerify, perhaps roll some of the areas that pull up, and then mow. Our fairway soils are good and there is very little issue with excessive organic matter, so solid tines fit the bill nicely for our fairways. We will continue on them next week and should be finished up by the end of the week.