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Certainty by Monsanto for Quackgrass!!!

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I noticed another quackgrass thread pop up so I thought I would post this. We just talked with one of our reps from a distributor this week and discussed if there was any new options for quack. He brought up Certainty again and said there has been some very good results, apparently better than they anticipated.

This product came out two years ago and has been getting some very good feedback with some new hope of a long awaited cure for this problem grass. Although Certainty has had very limited testing according to many it works on this grass very well. Our rep said with these results coming back he believes there will be an even better product on the market for quackgrass in the next 3 years!!

This product runs around $95.00 for a 1.5 oz. bottle which sounds very expensive but very little is needed to cover a large area. Also, you need to be extremely carefull when using Certainty because of its potentcy. We are getting a couple bottles in next week to test out on a few properties where customers have become very frustrated so I will give some updates in the next few weeks as to what happens. Have any of you guys used this product?? If so what were the results??

I found some info online that I will post below. It would seem like this is good news, it appears they are getting much closer to a cure for this problem grass!!! smile

Here is one link. - Similar

Some more info....

Certainty turf herbicide which is Sulfosulfuron 75% a.i. is one of the newer turf products on the market today. Certainty is a selective herbicide for control of annual and perennial grass and broadleaf weeds in highly managed turf sites. This product is a postemergence, systemic herbicide with limited soil residual activity. It provides postemergence control of many annual and perennial sedges, grass and broadleaf weeds on highly managed turf, sod farms and native grass sites. It is a selective herbicide that can be used over the top of many perennial warm-season and selected cool-season turfgrasses.

This product generally has been shown to be safe for use on the warm-season turfgrasses listed below

Bermudagrass (common or hybrid)





St. Augustinegrass

Seashore paspalum


Using 1.25 oz. per acre you should receive good control of the following sedges

Kyllinga, false green

kyllinga, fragrant

kyllinga, green

Nutsedge, purple (commonly known as "nutgrass")

Nutsedge, yellow (commonly known as "nutgrass)

Sedge, globe

Sedges, annual

Tall fescue control is obtained when this product is applied at 1.25 oz. per acre followed by a second application 21 to 28 days after the the 1st application. If a single application is desired, apply this product at 2.0 oz per acre (as described on the product label)

Dallisgrass Supression in Bermudagrass can also be expected, and is often times desired. Follow label directions. One of the toughest weeds to control Buttonweed can also be supressed with Certainty turf herbicide.

Annual bluegrass control in non-overseeded turf can be expected, and is often times desired.

Additional weeds listed for control or supression are

Barley, little

Bedstraw, catchweed

Bentgrass, creeping

Bluegrass, roughstalk

Bluegrass, bulbous

Burweed, lawn


Chickweed, common

Clover, white



Garlic, wild

Geranium, Carolina


Ivy, ground


Mustard, wild

Pennycress, field


Ryegrass, perennial


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I will be following this thread. A coworker just brought in a hockey stick for me so I can try the round-up thing again. Darn neighbors and their junk weeds...


Certainty has been used for Quack in Kentucky Blue Grass for a while. However, I don't have Ky Blue.

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Thanks for the info. I was just about to pull the back pack sprayer out and kill the whole yard off and fire up the bobcat crygrin

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I would be VERY VERY careful.

I'm on a couple of other lawn websites and the results from others using this product is there isn't the wiggle room for error in mixing or application rates.

I've mentioned it before too, in other threads, but I personally don't know if I'm going to use it on customer's lawns.

The local larger lawn chemical suppliers have stopped selling it, but you can still get it online.

The above info from guys already trying it out in the field, not reps from parent companies.

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LM2 we are getting it from a large local supplier. You are right though it sounds like there isn't alot of wiggle room. I think any product that comes in a 1.5 oz bottle for an acre or more of coverage is a little spooky to work with. sick We might test it out at my boss's house first, but with the few customers that are very frustrated they are at the point where we are going to use round-up and re-seed anyway so we figured why not give it a shot. I will follow up in a few weeks maybe try and take some pics too........

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Yes, the "last resort" option is what the guys on the other websites have gone to using as well.

What the biggest complaint is / was is yellowing of KY bluegrass, along with permanent damage.

If it's a last resort, and you know you're going to end up killing the grass around the plant anyways, then yes, I too would give it a shot.

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  • Your Responses - Share & Have Fun :)

    • you two have at it!!!!
    • Onxmaps is key when finding land owner information! 
    • my guess would be Asian beetles!!!!!!!
    • all this to increase the der herd, then ole mother nature comes along and throws us a couple winters it did a few years ago................and then what?
    • Generally people want more and/or bigger.  Those two things are what’s driving the revamp of the deer plan.  No? PTSD flashbacks from old debates and perceived innuendo in this one. “Antler Mongers” was one.  Equating letting young deer pass/prefer older deer as “catch and release”. May as well just shed hunt so one can brag is probably worse.  No, neither slapped on me personally but it’s part of swaying an argument against the opposition, whom I must be. Doesn’t everyone?  Or lack of change if it suits you better?  That’s just human nature.   Yes, PF, I agree that habitat is key.  But how do we improve that if we can’t even get 50 foot buffers for cleaner water and bird habitat without driving a wedge in farmer/hunter relationships?  Not net gain public land proposals?  Not using our license fees to the fullest extent to improve habitat on the public lands we already have?  Progress there would be phenomenal.   I just got done with a couple hour scouting drive in the area and checked around a couple public hunting places that look great from the road.  This time of year the ground is a canvas to tell me what’s living where.  I could pretty much pinpoint the borders of the public ground/private ground transitions just by the tracks I saw.  Or lack thereof.   The good news is might’ve been fortunate enough to have gained some new access via a work friend relationship.  I have the go ahead for turkeys and didn’t see one box blind on the field edges.  There may be hope.    Carry on.   Almost forgot; I just said eliminate party hunting for BUCKS.   Still game getting together to hunt with friends and help meet harvest goals.
    • Your point is very valid on the lack of habitat in much of southern MN as it is in much of the old zone 4 area. Each area of the state has a different "hole in the bucket". While that area lacks habitat, many other areas, including mine, have plenty of habitat, but lack high quality food to get the herd thru hard winters.
    • Leech,  I think many areas in WI have herds that have declined just as much as MN. I hunt SE of Turtle Lake, and used to see 25+ deer on opening morning before 9am on a regular basis. Now I feel good if I see a few critters the whole weekend. The many years of "T" seasons, "Herd control, and liberal antlerless tags have  dropped numbers in that area to a fraction of what they once were. It is what it is. I don't think they are doing better than MN is, but they started with a lot larger herd.  Their wolf issues will continue in the north, and CWD in the south. I don't envy their situation either.   FYI,  My land sits on the south end of the wolf range in NE Wadena county, MN. They generally do not bother my area except in the spring during calving season, although I have two of the buggers wandering around last November during rifle hunting. I usually have way more issues with coyotes and bears taking my fawns than wolves. 
    • I like sustainability as well. We party hunting and while that is a dirty word to many of the solitary hunters it's what we do. We never deplete the deer in our area and it's rare for us to fill even half our tags. Nobody gets more tags than one in our area.  I did actually make a solid proposal- habitat. But nobody took a moment to even touch that one.   I'm not sure if you are familiar with the southern part of the state but here is very little habitat outside of the southeast region. You just can't maintain the numbers to hold the numbers of deer that you need to get to where everyone who wants to harvest a deer can do so.   There was one specific post calling for an end to party hunting.   Habitat, habitat, habitat.   We should be focusing on improving habitat, bringing youth into the lifestyle and providing a positive public image to ensure future generations can enjoy hunting as well.    
    • Big Dave2, Just throwing the no party hunting out there as one possible solution. I certainly do not advocate getting rid of it. There are several other things being thrown around out there that I don't agree with as well.
    •   I would bet some cash there is a ton of lady bugs that wintered in there!