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How To Control Green Kyllinga

In warmer areas of the country, there is an irritating invasive species of plant which reemerges on vegetable gardens and turf that can be frustrating for a landscaper or gardener to get rid of. One such frustrating invader is a type of sedge known as green kyllinga (or simply “kyllinga”). 

In cases such as this infesting prolific plant, manual methods such as mowing or pulling weeds may not be enough to eliminate the problem. It may be wise to look into a chemical means of control which Solutions Pest & Lawn has a variety of options in the form of herbicides. On this page you will learn a little bit about the invasive green kyllinga weed and get tips and product recommendations on how to get rid of the invader. You can also shop for products which specifically target green kyllinga to remove the weed and help keep your lawn looking its best.

Green Kyllinga Background Information

Green kyllinga (Kyllinga brevifolia) comes from the family of sedges and is rapidly becoming an increasingly common problem in the southeastern part of the United States.  Believed to be a native plant to Asia, Green kyllinga first were reported in the country about 50 years ago. In the last 10 to 15 years however it has developed into developed into a major problem for turfgrass and landscape managers. Green kyllinga is often mistaken as purple or yellow nutsedge, but its growth habits, reproduction, and morphology are different.

Kyllinga has narrow grasslike leaves and when left unmowed they can reach up to 15 inches in length. The weed has one to three dark green, glossy, flat, hairless leaves that on average range from 2-2/5 to 6 inches (6–15 cm) long. Flowering stalks of the kyllinga are triangular in cross-section and end in a globular, dense flower head consisting of green flowers. Kyllinga seeds  are flat, oval and can reach about 3mm long. The seeds germinate between spring and summer.

The main problem with kyllinga is that they grow in the form of dense mats which can quickly take over a garden or lawn and be an eyesore. Kyllinga then makes little nutsedge seed heads which can make 5,000 seeds per year and they grow all year round before going dormant in the winter time. Pulling the weeds out or digging them out disperses the seeds. This also disturbs the roots and encourages more root hairs to grow so the best way to control them is chemicals.

Chemical Control Of Green Kyllinga

Chemical control of green kyllinga may be achieved with preemergent herbicides applied before the seeds germinate, with selective postemergent herbicides for established plants or with a combination of preemergent and postemergent herbicide treatments. The use of herbicides can be very effective if combined with cultural methods such as water management and exclusion of green kyllinga from turf and landscape areas.


Preemergent herbicides have been successful in limiting germination of green kyllinga seeds. These herbicides should be applied in spring before soil temperatures reach 60°F to limit germination in late spring and early summer. Preemergent materials that are effective include benefin, bensulide, dithiopyr, pendimethalin, and prodiamine.


Postemergent herbicides can limit growth of green kyllinga. Herbicide products available for green kyllinga and plants in the sedge family contain halosulfuron, imazosulfuron, MSMA, or trifloxysulfuron. Be sure to select a product that is safe for your existing turfgrass species. The best control has been obtained when halosulfuron is applied in two sequential applications. Make the second halosulfuron application when kyllinga plants show signs of recovering.


How To Get Rid of Green Kyllinga: 4 Step Process

Controlling green kyllinga doesn't have to be complicated. If you know the right techniques and have the right chemicals in your arsenal, control can be much easier. That's where we can help by sharing with you our simple to execute 4 Step Solution and by giving you our top recommendations of selective and non-selective herbicides that will get the job done. Follow these directions and you will have a lawn to be proud of once again.


Step 1: Identification - As we mentioned earlier, green kyllinga can often be mistaken for another sedge or weed. If you have trouble identifying your problem weed as green kyllinga, send us a photo at identification@solutionsstores.com and we can help you identify it properly as well as give you instructions on controlling it.


Step 2: Select a herbicide that is best to treat the particular type of grassy weed you have. For green kyllinga, we  recommend herbicides such as MSM Turf Herbicide, or Prodiamine 65 (Barricade Herbicide).


Step 3: Using the selected herbicide, spot treat weeds using a small pressure sprayer. If you have larger patches we recommend using a 1 or 2 gallon tank sprayer or even a tank sprayer if the weeds on your lawn have gotten severely out of control.


Step 4: In the springtime, use a pre-emergent to spread over your lawn like Prodiamine. Timing is very important. The treatment prevents the seeds from germinating. If you wait too long, the seeds will sprout. Also, applying pre-emergent too early and the treatment may dissipate and late germinating seeds will sprout.

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