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cberni1
LSU Fan
Metry
Member since Jun 2012
378 posts
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Best Crabgrass and Dallisgrass treatment
I added a lot of dirt to my front and backyard to fill very low spots and as somewhat expected, I’m getting crabgrass and Dallisgrass. I’ve seen on other posts that MSM turf works well And is reasonably priced. Is MSM my best option without breaking the bank?

I only have about .3 acre of acre so based on the treatment directions for MSM for this, I should be able to treat the lawn several times on a 2oz bottle.

Are there are any other options that aren’t as expensive as Celsius and the like.


AU_251
Wisc-Milwaukee Fan
The Lorde's House
Member since Feb 2013
7782 posts

re: Best Crabgrass and Dallisgrass treatment


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LSUperior
Member since Aug 2009
1148 posts

re: Best Crabgrass and Dallisgrass treatment
I just finished reasearching this pretty thoroughly and the only thing I found to be effective and killing Dallisgrass is MSMA. I don't believe the MSM Turf will work on Crab or Dallisgrass.


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RollDatRoll
Atlanta Braves Fan
Who Dat. Roll Tide.
Member since Dec 2010
11841 posts

re: Best Crabgrass and Dallisgrass treatment
Crabgrass is easy. Grab anything with Quinclorac in it. Most of the weed killers in HD or Lowes that say crabgrass killer will have this ingredient in it. I would just buy straight quinclorac on Amazon and mix it yourself. It will last you forever. Here is a link to it.. Quinclorac

Dallisgrass is a real SOB. It is a perennial so it keeps coming back each year if you don't kill it or remove it. Really depends on the type of grass you have. If you have bermuda, MSMA works really well. If not, and you just have a little of it, you may be best to dig it out with a shovel.


The Spleen
Alabama Fan
Member since Dec 2010
23969 posts

re: Best Crabgrass and Dallisgrass treatment
I have a professional spray my yard and even they had problems getting rid of the dallisgrass when I first hired them. They started in the spring spot treating it, then really got aggressive with it in the fall. The following year I still had some, but not as much. By the two year mark it was all gone. I don't know what they used though.

They had the crabgrass licked after the first application.


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cberni1
LSU Fan
Metry
Member since Jun 2012
378 posts
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re: Best Crabgrass and Dallisgrass treatment
It’s St Aug. I am speculating I have Dallisgrass but it could be mostly crabgrass.


RollDatRoll
Atlanta Braves Fan
Who Dat. Roll Tide.
Member since Dec 2010
11841 posts

re: Best Crabgrass and Dallisgrass treatment
Post some pics if you want some of us to take a look and let you know. Quinclorac will definitely knock the crabgrass on its ass.


cberni1
LSU Fan
Metry
Member since Jun 2012
378 posts
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re: Best Crabgrass and Dallisgrass treatment

This post was edited on 5/15 at 4:05 pm


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BonesMalone
Member since May 2019
7 posts

re: Best Crabgrass and Dallisgrass treatment
If you want to get creative with the Dallisgrass, use this method:
The Dallisgrass always grows higher than the st aug. Put a latex glove on one hand and a cheap garden over that. Dip the glove in a roundup solution and gently wipe the top of the Dallisgrass (don't touch the st aug obviously). The Dallisgrass will be gone in 10 days. Done this a few times in folks yards when its gotten out of control. If it's not much, just cut it out.


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cberni1
LSU Fan
Metry
Member since Jun 2012
378 posts
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re: Best Crabgrass and Dallisgrass treatment
It's a bit hard to see but i couldn't get it much bigger.

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This post was edited on 5/15 at 4:05 pm


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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
290 posts

re: Best Crabgrass and Dallisgrass treatment
Can’t use quinchlorac on a St Augustine or Centipede lawn without damaging it, though it’s recommended for Bermudagrass and Zoysia.

Can’t use sethoxydim for crabgrass control in St Augustine (will damage/kill St. Aug) but you can use it in a Centipede lawn. A pre-emergent applied by mid-Feb next year will be your best control method for crabgrass in St Augustine.

Dallisgrass, if you are sure that is what you have, is more problematic. I’ll refer you to this article from the LSU AgCenter.
Dallisgrass Control in Lawns

Some additional info from the Ag Center
Homeowner Top Weeds in Turft and Control Options






cberni1
LSU Fan
Metry
Member since Jun 2012
378 posts
 Online 

re: Best Crabgrass and Dallisgrass treatment
I used the LSU Ag website and MSMA is the recommended Post Emergent option for Dallisgrass and Crabgrass so thats where i got my initial thought process from. However, i don't know if MSM turf is the same as MSMA and MSMA is substantially more expensive.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
290 posts

re: Best Crabgrass and Dallisgrass treatment
Understood - MSM Turf (metsulfuron methyl) is not the same herbicide as MSMA. MSMA is used on Bermudagrass turf to control the weeds you are targeting but will kill St Augustine or Centipede grass. You did say you had St Augustine - correct? Honestly, your options are limited with post-emergent control of these 2 weed grasses in St Augustine.


classicgold
LSU Fan
bfe
Member since Feb 2017
1107 posts

re: Best Crabgrass and Dallisgrass treatment
I've got a ton of dallisgrass in my front yard, and I sprayed what I could with glyphosphate. I plan on digging it out with a yard knife and buying sod to plug it. I'm so tired of dealing with it, and I just don't think there is any other way to make sure it is gone for good.


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cberni1
LSU Fan
Metry
Member since Jun 2012
378 posts
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re: Best Crabgrass and Dallisgrass treatment
To be clear, most of this grass is coming through the sand where no St Aug grass has grown yet so I may try some chemicals you listed. The other option is to start digging which could take time but may be the best option.


Themole
Florida Fan
Palatka Florida
Member since Feb 2013
4219 posts
 Online 

re: Best Crabgrass and Dallisgrass treatment
To be clear, most of this grass is coming through the sand where no St Aug grass has grown yet so I may try some chemicals you listed. The other option is to start digging which could take time but may be the best option.

If you have St. Augustine. Just sprinkle some Baking Soda on the Crabgrass, it will be dead within 12-24 hours with no harm to your St. Augustine grass. I promise this is no joke.
This post was edited on 5/15 at 6:31 pm


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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
290 posts

re: Best Crabgrass and Dallisgrass treatment
OK sorry I missed that. If there is no St Aug where you need to spray then you can use any of the herbicides labeled to control on crabgrass and dallisgrass mentioned by others in this thread, including glyphosate (“Roundup”). None of these herbicides mentioned have residual activity that will prevent St Aug from filling in the area overtime.

Also if I’m not mistaken, MSMA is no longer labeled for residential lawn use, but rather is labeled for use in commercial applications, sod farms, golf courses, etc. so I’m not sure you can purchase small containers of the product, usually 2.5 gal units, hence the higher cost.
This post was edited on 5/17 at 8:23 am


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