(By Jared Hoyle, KSU Turfgrass Research and Extension)
As I talk to turfgrass professionals across the state I hear that some are getting plenty of rain while others are getting none. This time of the year we think that if we are getting some precipitation we will have yellow nutsedge popping up everywhere. Well that is not always true. Yellow nutsedge does favor moist soils but it can also grow in well-drained sites.
One 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! Also make sure you check for turfgrass tolerances.
****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
