Kansas State University


K-State Turfgrass

Category: Weeds

Broadleaf Weed Control and PRE Crabgrass Control – VIDEO

(By Jared Hoyle and Jake Reeves, KSU Turfgrass Research and Extension)

Just a couple weeks ago the turfgrass team held the Annual Kansas Turfgrass Field day in Manhattan, KS at the Rocky Ford Turfgrass Research Center.  At one of the stops Dr. Jared Hoyle talked about new products that are on the marked for post-emergent broadleaf weed control and pre-emergent crabgrass control.  If you couldn’t make it out to field day here is a short little video about what you missed.

Converting Tall Fescue to Buffalograss – VIDEO

(By Jake Reeves and Jared Hoyle, KSU Turfgrass Research and Extension)

Are you thinking about converting your tall fescue lawn into buffalograss?  If you are, new research is currently being conducted at Rocky Ford Turfgrass Research Center in Manhattan, KS to pin down the best herbicide application timing to reduce the amount of time that you don’t have turf in your lawn.

Check out the video here of KSU Turfgrass Research Technician, Jake Reeves, discuss this research and how it will impact turfgrass areas across Kansas.

KSU & KDOT Collaborate on Roadside Research Project

Kansas State University, Assistant Professor Jared Hoyle, PhD, along with researchers Jacob Reeves and Evan Alderman, are studying turfgrass on a plot of land on  U.S. 283 near WaKeeney. The two-year-study is testing the right blend of turfgrass that will do well on Kansas roadsides. Please watch the video and let Hoyle explain what they are doing on the side of the road, and how it will be beneficial to all roadsides in Kansas.


The 2016 Turfgrass Research Reports Now Online!

(By Jared Hoyle: KSU Turfgrass Research and Extension)

Every year we create new turfgrass research reports.  This year we have lots of new information from the release of a new zoysiagrass to unmanned aircraft systems for drought monitoring.

photo contest

Listed below is a list of topics and links to the 2016 reports.  Enjoy!

  1.  Release of KSUZ 0802 Zoysiagrass
    J. Fry and Ambika Chandra
  2. Nitrous Oxide Emissions and Carbon Sequestration in Turfgrass: Effects of Irrigation and Nitrogen Fertilization (Year 1)
    R. Braun, D. Bremer, and J. Fry
  3. Small Unmanned Aircraft Systems Detect Turfgrass Drought
    D. Bremer and Deon van der Merwe
  4. 2013 National Turfgrass Evaluation Program Bermudagrass Test: 2015 Data
    L. Parsons, J. Griffin, and J. Hoyle
  5. 2012 National Turfgrass Evaluation Program Tall Fescue Test: 2015 Data
    L. Parsons, M. Kennelly, J. Griffin, and J. Hoyle
  6. Influence of Glyphosate Timings on Conversion of Golf Course Rough from Tall Fescue to ‘Sharps Improved II’ Buffalograss
    J. Reeves, J. Hoyle, D. Bremer, and S. Keeley
  7. Late Pre-Emergent Control of Annual Bluegrass with Flazasulfuron & Indaziflam
    J. Reeves and J. Hoyle
  8. Evaluating the Effects of Simulated Golf Cart Traffic on Dormant Buffalograss and Turfgrass Colorants
    E. Alderman, J. Hoyle, J. Fry, and S. Keeley
  9. Preventative Control of Brown Patch with Select Fungicides
    E. Alderman, J. Reeves, and J. Hoyle
  10. Development of Cold Hardy, Large Patch Resistant Zoysiagrass Cultivars for the Transition Zone
    Mingying Xiang, J. Fry, and M. Kennelly
  11. Evaluating Zoysiagrass-Tall Fescue Mixtures in Kansas
    Mingying Xiang, J. Fry, and M. Kennelly

Lawn Problem Solver

(By Jared Hoyle; KSU Turfgrass Research and Extension)

Do you have an unwanted weed or a disease that you can’t figure out what it is or how to control it?  Check out the Lawn Problem Solver at the KSU Turfgrass Website.  Is has information about how to identify those pesky weeds, diseases, insects and more.

Also, for homeowner extension questions please locate your local area or county extension agent here – http://www.ksre.k-state.edu/about/stateandareamaps.html 

Is you transition zone Bermudagrass “Out of Gas” This Spring?

I saw this online the other day and thought it would be a good blog post to share from one of my good friends Jerad Minnick, and independent advisor and teacher for natural grass sports surfaces.

Jerad talks about how our bermduagrass is confused from the spring in the Mid-west to light requirements for bermudagrass to de-compacting the soil.




Kick it in the tuber – yellow nutsedge control!

(By Jared Hoyle, KSU Turfgrass Research and Extension)

Slide1Last year about this time I posted about yellow nutsedge control in home lawns and just in case you missed it here is the link;

Revisiting Yellow Nutsedge Control in Home Lawns

But for all you commercial turfgrassmanagers today’s nutsedge control blog is for you.  There are many herbicides available for control but there are some things to do before you apply herbicides and those are making sure that the turf has a healthy environment to grow.  Sometimes that is easier said than done.  If you can improve drainage and compaction that would increase the health of the turf and help out compete yellow nutsedge.


If using a herbicide application timing is critical.  During mid summer yellow nutsedge starts making tubers and if you apply herbicides before tuber production you will get better control.  If you wait until the yellow nutsedge is big and starting to make tubers then you will be playing catch-up all year. So sooner is better.  Don’t wait for it to get too big.

Here are some options for yellow nutsedge control;

  • sulfentrazone
  • halosulfuron
  • iodosulfuron
  • mesotrione
  • bentazon
  • triflozysulfuron
  • flazasulfuron
  • sulfosulfuron

There are many different products out there that contain these active ingredients so just make sure you have an active ingredient that has yellow nutsedge control!

****Always remember to READ THE LABEL for the correct rate, turfgrass tolerance, and specific instructions before application.****

***Mention of trade names or commercial products in this article is solely for identification purposes and does not imply recommendation or endorsement, nor is criticism implied of similar products not mentioned by Kansas State University.***

Don’t forget to follow me on twitter @KSUTurf.

Also, visit our facebook page www.facebook.com/KSUTurf




Nozzles and water quality, you snooze you lose

Nozzles and water quality? Does that make you yawn?

Let’s start with nozzles


Spray nozzles might seem like a boring topic, but as stated in an article by Shepard, Agnew, Fidanza, Kaminski, and Dant in 2006 in Golf Course Management, nozzles are “The last piece of equipment through which sprays pass before contact with the turf.”

Think about the cost of all that stuff going through the sprayer, the time of the person applying those materials, and the fuel to power that sprayer (unless it’s a hand-sprayer, in which case I guess you count the cost of the donuts to feed that person walking around). Nozzles are small, and they don’t cost much, but they can really contribute to the success of an application and help maximize the bang for your buck on all those OTHER costs.

(Gee… I really need a donut!)

megan donut

Anyway – as noted in the article cited above, nozzles determine the amount of chemical applied, the uniformity of the application, the coverage, and they can influence the risk of drift. Make sure you calibrate your equipment, replace worn nozzles, and follow all label instructions about application equipment for the materials you are spraying. A worn-out nozzle could easily be allowing 10% or more excess material to be applied, which = 10% more money. Equipment that is not calibrated right might be applying LESS than you need to get adequate control.

Okay – now onto water quality.

Water quality? Snooze?

I just said that nozzles are the last thing to touch the materials before it goes soaring through the air and smacks into the plant. Water? That’s the stuff that cozies up with the product as soon as it hits the tank and stays with it the whole way.

Pop quiz – Which of these can affect pesticide performance?

  • Water pH
  • Water hardness
  • Dissolved minerals
  • Suspended solids

Or – you guessed it – all of the above.

Do you know what the pH of your water is? When is the last time you tested it?

There is an excellent publication on The Impacts of Water Quality on Pesticide Performance from Purdue. It is an easy read that discusses these factors with some pointers about testing. For example, pH can be testing using easy at-home test strips.

Be sure to follow all label instructions about water quality. Some pesticides are very sensitive to high pH, for example.

Don’t forget about some of those basic nuts and bolts, like nozzles, calibration, and water. If you don’t test them out now and then, there could be problems lurking that you don’t know about.


Turfgrass Selfie Series #2 [VIDEO] – Wild Violet Control

(By Jared Hoyle; KSU Turfgrass Research and Extension)

“We have hit the mother load!”  Behind Throckmorton Hall I ran into the largest patch of Wild Violet I have ever seen so we decided that would be a good Turfgrass Selfie Series Video. Enjoy!

IMG_0750Also, we tried to work out some of the kinks from the first episode but still have a ways to go to get all the kinks out. The goal of this video series is to use our phones and to make short videos without too much editing and taking too much time but to deliver insightful information. With that being said we can’t cover everything in the short video but at least it gets the basic information out there.

So for the second Turfgrass Selfie Series we bring you wild violet control… “We have hit the mother load!”

For more information go to www.ksu.edu/turf

Orchardgrass control, or lack of?

(By Jared Hoyle; KSU Turfgrass Research and Extension)

Last night while cruising through Facebook I can across a blog that Dr. Nick Christians from Iowa State wrote about orchardgrass.  Take a good look at the pictures because you might have some in your lawn too.


Now controlling orchardgrass is a different story.  Just because we can identify it doesn’t always mean it is easy to control.  Unfortunately, there no selective control options that we can use in cool-season turfgrass systems.  Many different chemistries (mesotrione, chlorosulfuron, metsulfuron, and more) have been tested at Purdue but didn’t even provide satisfactory control.

So with that being said the options out there right now are physical removal, blah… Or non-selective herbicides like glyphosate.

Always remember to READ THE LABEL for the correct rate, turfgrass tolerance, and specific instructions before application!!!

***Mention of trade names or commercial products in this article is solely for identification purposes and does not imply recommendation or endorsement, nor is criticism implied of similar products not mentioned by Kansas State University.***

Don’t forget to follow me on twitter @KSUTurf.

Also, visit our facebook page www.facebook.com/KSUTurf