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Category: Weeds

The 2017 Turfgrass Research Reports Now Online!

(By Jared Hoyle, KSU Turfgrass Research and Extension)

The 2017 Turfgrass Research Reports are now available!!!! See what research projects the KSU Turfgrass Team have been up to.

Click the link below to take you to the Kansas Agriculture Experiment Station Research Report Page.

http://newprairiepress.org/kaesrr/vol3/iss4/

Volume 3, Issue 4 (2017) Turfgrass Research

Research Reports

PDF

Measurement of Evapotranspiration in Turfgrass: Recommended Techniques and Adjustment Coefficients
Kenton W. Peterson, D. Bremer, Kira B. Shonkwiler, and J. M. Ham

PDF

Evaluating Zoysiagrass-Tall Fescue Mixtures in Kansas
Mingying Xiang, J. Fry, and M. Kennelly

PDF

2012 National Turfgrass Evaluation Program Tall Fescue Test: 2016 Data
L. Parsons, Michael J. Shelton, M. Kennelly, J. Griffin, and J. Hoyle

PDF

2013 National Turfgrass Evaluation Program Bermudagrass Test: 2016 Data
L. Parsons, Michael J. Shelton, J. Griffin, and J. Hoyle

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

Monthly calendar for cool-season lawns for the rest of 2017.

(By Jared Hoyle, KSU Turfgrass Research and Extension)

I can’t believe it… Where has the summer gone?  I blinked and students are running around campus and just last night it was cool enough to cut the A/C off and open the windows.  Not to mention just in a couple weeks we will be watching college football.

When all of this happens I know I need to be getting out and working on my cool-season lawn.  Time for fertilizer, overseeding existing lawns and establishing new lawns.  So first I want to go back and look at the lawn calendar for cool-season lawns.  Here are some recommendations.

Late-July through August
If you see grub damage, apply a grub killer that contains Dylox. Imidacloprid is effective against young grubs and may not be effective on late instar grubs. The grub killer containing Dylox must be watered in within 24 hours or effectiveness drops.

September
Fertilize around Labor Day. This is the most important fertilization of the year. Water in the fertilizer.

November
Fertilize. This fertilizer is taken up by the roots but is not used until the following spring. Water in fertilizer. Spray for broadleaf weeds even if they are small. Broadleaf weeds are much easier to control in the fall than in the spring. Spray on a day that is at least 50 degrees. Rain or irrigate within 24 hours reduces effectiveness. Use label rates for all products!

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

K-State Radio Network – Overseeding Cool-Season Lawns

(By Jared Hoyle, KSU Turfgrass Research and Extension)

For this week’s horticulture segment, K-State turfgrass specialist Jared Hoyle talks about taking the preliminary steps now for overseeding a cool-season lawn this fall.

Click the link below for K-State Research and Extension Agriculture Today Radio Program hosted by Eric Atkinson.

New Turfgrass Publications

(By Jared Hoyle, KSU Turfgrass Research and Extension)

The KSU Turfgrass Team has been busy updating turfgrass extension publications.  Some of the most recent publications include benefits of a healthy turf, lawn fertilization guide and turfgrass mowing.

Enjoy the updated publications!

Benefits of Heathy Turfgrass

Environmental, economic, health, and safety benefits of turfgrass found in lawns, athletic fields, parks, and roadsides.

https://www.bookstore.ksre.ksu.edu/Item.aspx?catId=545&pubId=12800

Lawn Fertilizing Guide

This guide helps homeowners determine how much fertilizer to apply to keep lawn vigorous and healthy.

https://www.bookstore.ksre.ksu.edu/Item.aspx?catId=545&pubId=10639

Turfgrass Mowing: Professional Series

Mowing basics for professional turfgrass managers. Information on mowing height and frequency, clippings, mowing pattern, mower operation, blade sharpening, mower selection, maintenance, and safety

https://www.bookstore.ksre.ksu.edu/Item.aspx?catId=545&pubId=712

Mowing Your Lawn

Mowing basics for homeowners. Includes information on mowing height and frequency, pattern, mower operation, maintenance, and safety.

https://www.bookstore.ksre.ksu.edu/Item.aspx?catId=545&pubId=615

Recycling Grass Clippings

Information for homeowners on why and how to recycle grass clippings.

https://www.bookstore.ksre.ksu.edu/Item.aspx?catId=545&pubId=701

 

For more turfgrass publications visit the KSRE Bookstore.

https://www.bookstore.ksre.ksu.edu/Category.aspx?id=528&catId=545&Page=1

Homeowner Do-It-Yourself Lawn Calendar Reminders!

(By Jared Hoyle, KSU Turfgrass Research and Extension)

Earlier this year I wrote two blog posts that listed out both a cool- and warm-season lawn calendar for homeowners.  If you are anything like me then I have already forgot what I was suppose to do so sometimes it is good to have a reminder.

Cool-season Lawn Calendar Reminder 

June through Mid-July
Apply second round of crabgrass preventer by June 15 – unless you have used Dimension (dithiopyr) or Barricade (prodiamine) for the April application. These two products normally provide season-long control with a single application. Remember to water it in. If grubs have been a problem in the past, apply a product containing imidacloprid during the first half of July. This works to prevent grub damage. It must be watered in before it becomes active.

Warm-season Lawn Calendar Reminder

May – August 15
Fertilize with 1 lb. of nitrogen per 1,000 square feet per application. Follow the recommendations on the bag. More applications will give a deeper green color, but will increase mowing and may lead to thatch buildup with zoysiagrass. Bermudagrass can also have problems with thatch buildup but thatch is less likely with Bermuda than zoysia. Bermudagrass – Use two to four applications. Zoysiagrass – Use one to two applications. Too much nitrogen leads to thatch buildup.

One Application: Apply in June.
Two Applications: Apply May and July.
Three Applications: Apply May, June, and early August.
Four Applications: Apply May, June, July, and early August.

Remember to look and see if you are using a quick release nitrogen source or a slow release nitrogen source.  If you use a quick release source then it is immediately available but only lasts a couple weeks.  Thats why you would have to make a couple of applications like it is listed above.  If you are going to use a slow release source it will tell you on the bag how long the product will last.  Therefore, you might not have to make as many applications.

So generally you want to use a total of 2 to 4lb. of nitrogen per 1,000 square feet per year for bermudagrass and 1 to 2 lb. of nitrogen per 1,000 square feet per year for zoysiagrass.

Buffalograss – Fertilize with 1 lb. of nitrogen per 1,000 square feet during June. More applications will give a deeper green color. If it is felt that a second application is needed, apply in July. Do not exceed more than 2 lbs of nitrogen per 1,000 square feet per YEAR for a home lawn.

June
If grubs have been a problem in the past, apply a product containing imidacloprid by mid July. Imidacloprid can be applied as early as mid May if there are problems with billbugs or May beetle grubs. These products kill the grubs before they cause damage. They are effective and safe but must be watered in before they become active.

June is also a good time to core aerate a warm-season lawn. Core aeration will help alleviate compaction, increase the rate of water infiltration, improve soil air exchange and help control thatch.

For the full Do-It-yourself Lawn Calendars click the links below

Warm-Season – http://blogs.k-state.edu/turf/homeowner-do-it-yourself-lawn-calendar-for-warm-season-grass/ 

Cool-Season – http://blogs.k-state.edu/turf/homeowner-do-it-yourself-lawn-calendar-for-cool-season-grasses/

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

The 70 MPH weed – Yellow nutsedge

(By Jared Hoyle, KSU Turfgrass Research and Extension)

The 70 MPH weed….  That is what I call yellow nutsedge.  Why?  It’s because you can be driving 70 MPH down the highway, look over, and see yellow nutsedge growing in a lawn.  The erect light green linear leaves tend to grow faster than the turf so it sticks up above the canopy.

Yellow nutsedge can not only grow in wet soils but also extremely dry soils as well.

Yellow nutsedge is not a new weed but it sure is a persistent weed.  In Kansas, typically we don’t see it until about June.

Once of the easiest ways to identify yellow nutsedge is by a couple special features;

  • erect
  • persistant
  • yellow inflorescence
  • gradually tapering leaves to a sharp point
  • tubers not in chains
  • triangular stem

To control yellow nutsedge, if you can get applications out before tuber production then you will see increased control.  But beware, yellow nutsedge will continue to grow as long as the environment is favorable for growth, so more than one application maybe necessary.

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 for turfgrass professionals;

  • 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!

For homeowners – Here is some more information to help with yellow nutsedge control in a home lawn.

http://blogs.k-state.edu/turf/revisiting-yellow-nutsedge-control-in-home-lawns/

****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

 

 

Don’t miss the 2017 KSU Turfgrass Field Day – August 3rd

The next Turfgrass Field Day will be held on Thursday, August 3, 2017 at the John C. Pair Horticultural Research Center, Wichita.
The KTF Turf Field Days are a great way to see and learn about the turfgrass research at K-State first hand. The events are held annually in the summer at the turfgrass research locations of Kansas State University.

The Field Day qualifies for recertification credit hr for commercial pesticide applicators.

You can now Register and Pay Online at  https://2017turffieldday.eventbrite.com
or you can register by downloading, printing, and mailing go to the 2017 Field Day brochure.

Exhibitors can get more information from the Exhibitor Registration Form.

Schedule of the 2017 Field Day 
8:00 a.m. Registration (coffee, tea, donuts)
Visit Exhibitors
8:45         Welcome
9:00        Tour Highlights:

*Turfgrass Weed Control Update
*Turf & Ornamental Diseases
*Bermudagrass & Zoysiagrass Cultivar Selection
*Using Kansas Mesonet to Imrpove Accuracy in Landscape Irrigation
*Right Plant, FROM the Right Place
* Prairie Star Flowers
*Tall Fescue NTEP
*Turf & Ornamental Insect Control
11:30       Lunch

After Lunch

  • Equipment Demonstrations

If you have any questions, please contact,
    Christy Dipman 
    1712 Claflin, 2021 Throckmorton Hall
Manhattan, Kansas 66506
Phone: (785) 532-6173
Fax: (785) 532-6949
Email: 
Christy

 

 

Stinkgrass

(By Jared Hoyle, KSU Turfgrass Research and Extension)

Many people like the smell of freshly cut grass but there is a weed out there that is common in many lawns in KS called stinkgrass and it stinks.  It stinks cause it is a weed and it also literally stinks.

Stinkgrass sometimes referred to as stinking lovegrass or candy grass is a summer annual grassy weed that was introduced from Europe. This weed is most noticeable when the grayish-green triangular shaped panicle type seedhead is present. The seedhead closely resembles that of the bluegrass family and may cause confusion in identification. Individual spikelets, however, possess a grayish-silver, sometimes purple color and at times may appear waxy.

The leaves are smooth, glossy below and rough on top typically ranging from ¼ to ½ inch wide. The stem of the plant is jointed with slightly swollen nodes, occasionally with a 45 degree bend near the stem base.To vegetatively identify stinkgrass, look at the ligule, the sheath and back of the leaf blade where it attaches to the collar. The ligule is a short fringe of hairs, with several long hairs at the outer edge.

Another distinctive characteristic of stinkgrass is that it produces a bitter pungent odor, most noticeable when the tissue is crushed or mowed, hence the name stinkgrass. It is said to be poisonous to livestock, particularly horses, but most animals avoid grazing it because of the odor. Stinkgrass normally spreads by seed dispersal which emerges in late spring a few weeks after crabgrass or at a similar time to goosegrass. Maximum germination occurs when soil temperatures remain above 65°F for several weeks. Mature this plant will grow from 1 to 2 feet tall and it can temporarily survive mowing heights typical for home-lawns.

Occurrence

In general, stinkgrass is not a persistent problem in lawns but commonly occurs in newly established or poorly maintained lawns and low maintenance areas like roadsides that were once cultivated as agricultural land. It can also be a problem in newly planted sod fields. It has a shallow fibrous root system and is normally not a problem in properly maintained turf the second year after planting.

Non-Chemical Control

Stinkgrass can be very easily removed by hand. In newly established lawns, however, practices to promote maximum density of the desirable turf species like adequate fertility, proper mowing and irrigation will eventually crowd out this weed. Stinkgrass will die after the first killing autumn frost allowing a vigorous desirable turf species to fill the voids.

Chemical Control

No specific pre-emergence herbicides are labeled for turf use, though most common pre-emergent herbicides suitable for crabgrass and goosegrass should also be effective on stinkgrass without injury to the desired turf species. The only compounds labeled for post-emergent control are glufosinate (Finale) or glyphosate (Round-up). Both of these herbicides are non-selective herbicides which kill all green plants and should not be applied to desirable turfgrasses. Once the stinkgrass has been controlled, however, these areas can then be reseeded or sodded.

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

Roundup for Lawns – UPDATE – K-State Radio Network

(By Jared Hoyle, KSU Turfgrass Research and Extension)

This past weekend I was at a lawn and garden store and saw the Roundup for Lawns display.  Customers were walking by and picking up a bottle.  Some would get Roundup MAXX, Roundup for Lawns and some bought just straight Roundup. I thought to myself, “I hope they know the different between those products.”

Here is some information on the products and a link to Agriculture Today, daily radio program, with Eric Atkinson and Dr. Jared Hoyle.  He explains the difference between the products and even what the bottles look like and why it is important to make sure you pick up the correct product.

Article – http://blogs.k-state.edu/turf/every-homeowner-needs-to-know-the-difference-between-roundup-roundup-for-lawns/

Radio Program – https://www.ksre.k-state.edu/news/radio-network/agtoday-mp3/042017-hoyle.mp3 

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

Turfgrass Care for Homeowners (K-State Radio Network) – April Broadcast

(By Jared Hoyle, KSU Turfgrass Research and Extension)

About a week ago I was invited back again to speak with Eric Atkinson, host of Agriculture Today a daily program distributed to radio stations throughout the state. It features K-State agricultural specialists and other experts examining agricultural issues facing Kansas and the nation.

This week we covered the following;

  • fertilization of cool-season lawns
  • fertilization of warm-season lawns
  • weed control
  • preemergent herbicide control
  • spring mowing heights

Check out the radio program below!

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