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oldskule
LSU Fan
ST GEORGE, LA
Member since Mar 2016
454 posts

Virginia Buttonweed is killing me.....
Please offer suggestions....I have posted this once before, and still struggling. Seems to be really showing up strong right now.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2542 posts

re: Virginia Buttonweed is killing me.....
Celsius or MSM Turf now, and when it cools to 85 F or less, Fertilome Weed-Free-Zone if you want. Use surfactant will all three herbicides. Anticipate 2 or more sprays at 3 to 4 week intervals. VBW is more difficult to kill when mature - learn to spot it when young and before white flowers form and you’ll have more success controlling it.


WylieTiger
LSU Fan
Member since Nov 2006
9440 posts

re: Virginia Buttonweed is killing me.....
Bayer Celsius


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20
trident
Tennessee Fan
Member since Jul 2007
4088 posts

re: Virginia Buttonweed is killing me.....
I’m loosing the battle. Got the stuff to kill it and am spraying. My yard is just yellow


skidry
LSU Fan
Member since Jul 2009
1934 posts

re: Virginia Buttonweed is killing me.....
Too hot.


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02
RaginCajunz
LA-Lafayette Fan
Member since Mar 2009
3258 posts
 Online 

re: Virginia Buttonweed is killing me.....
It seems like in the past few weeks it went from minimal to out of control. It has overtaken my grass in a bunch of areas which seems to be on a decline. I did an MSM Turf treatment and just completed a bifinthrin treatment because I noticed a ton of sod worm moths when I did the MSM Turf.

Not sure if it was the increase in rain, the right time of the year...or what. It just spiraled out of control fast.
This post was edited on 8/29 at 1:52 pm


MikeD
LSU Fan
Baton Rouge
Member since Jan 2004
4189 posts

re: Virginia Buttonweed is killing me.....
Temperature restrictions on Celsius or MSM for St Aug grass?


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2542 posts

re: Virginia Buttonweed is killing me.....
quote:

Temperature restrictions on Celsius or MSM for St Aug grass?

Safe at these temps but I’d suggest spraying in early morning and expect to have some temporary yellowing of St Augustine, particularly with MSM Turf, but it will recover provided you don’t exceed labeled application rates.


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20
GRIZZ
LSU Fan
PRAIRIEVILLE
Member since Nov 2009
3666 posts

re: Virginia Buttonweed is killing me.....
Craw, I have a patch that's about 6'x4'. I think it choked out every bit of centipede that was growing in that area. Would it be best to just hit it with roundup and resod. If so, how long after round up can I safely lay sod. Thanks!
This post was edited on 8/29 at 3:11 pm


habz007
LSU Fan
New Orleans
Member since Nov 2007
2011 posts
 Online 

re: Virginia Buttonweed is killing me.....
Same here. I was free and clear but just had some that showed up within last 10 days or so.


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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2542 posts

re: Virginia Buttonweed is killing me.....
quote:

Craw, I have a patch that's about 6'x4'. I think it choked out every bit of centipede that was growing in that area. Would it be best to just hit it with roundup and resod. If so, how long after round up can I safely lay sod. Thanks!


Solid patch VBW - sure. Glyphosate (“roundup”) has no residual soil activity so you can put sod down after the VBW dies - 2/3 weeks. You want the glyphosate to translocate to underground rhizomes and kill them as well.

VBW can reproduce/spread four ways - aboveground stolons, underground rhizomes, and above and below ground seeds - it’s why it’s so difficult to eliminate completely. The area you re-sod may very well have some that comes back from seed - just look for it when it re-emerges in April/May (my experience in BR) and spray it with Weed-Free-Zone, MSM Turf or Celsius and as needed throughout the spring/summer/early fall.

I have no issue controlling it and it getting out of hand by locating it and spraying it when it’s is immature, before you see the white flowers. Just look at pics of immature VBW on the internet so you know what to look for, and take it from there.

ETA: Don’t spray Weed-Free-Zone when temps exceed 85 F
This post was edited on 8/30 at 12:13 am


ronk
Member since Jan 2015
2353 posts

re: Virginia Buttonweed is killing me.....
Celsius is the fastest way to kill it without killing your lawn. If you are spraying that and it’s not dying then something is off. I’ve never had a problem killing it. Troublesome yes, but it always dies.


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10
LEASTBAY
LSU Fan
Member since Aug 2007
7110 posts

re: Virginia Buttonweed is killing me.....
MSM turf has killed mine easily.


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Bryant91092
Alabama Fan
Member since Dec 2009
21777 posts

re: Virginia Buttonweed is killing me.....
Spurge, oxalis, and patches of crabgrass are hurting my lawn. Oxalis and spurge really ramped you this week though I imagine because of all the rain the past couple of weeks? Any good herbicide that targets all three of these?


ronk
Member since Jan 2015
2353 posts

re: Virginia Buttonweed is killing me.....
There needs to be a sticked thread titled Celsius. Buy Celsius. It kills that stuff.


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White Bear
USA Fan
NWLA
Member since Jul 2014
6587 posts
 Online 

re: Virginia Buttonweed is killing me.....
I just sprayed mine again yesterday. Takes persistence. MSM + surfactant

Edit I guess I need to try Celsius bc msm seems to only half arse manage vbw.
This post was edited on 8/30 at 10:16 am


turkish
Member since Aug 2016
151 posts

re: Virginia Buttonweed is killing me.....
I also have had lackluster results with MSM on VBW. It seems to work well on the other targets. Celsius has been incredibly effective on the VBW, on the other hand, and surprisingly good on dallisgrass, too.


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GetmorewithLes
LSU Fan
UK Basketball Fan
Member since Jan 2011
11746 posts

re: Virginia Buttonweed is killing me.....
Pull what you can and then spray a few days later (MSM turf or Celsius). VB can grow from seed, cutting, or root so it is hell to kill it. It takes a concerted effort over time to get rid of it completely. I see some people advocating Roundup and then sod. Roundup will only kill the live plant and not the seed so it will come back.

One other issue here is that it grows in damp soil. So if you can dry it up that will put a hurt on it. Some places like low point drainage areas in shade this is not an option.


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GRIZZ
LSU Fan
PRAIRIEVILLE
Member since Nov 2009
3666 posts

re: Virginia Buttonweed is killing me.....
The round killed that patch. It was actually 6x10. While removing the dead VBW, I noticed a ton of seeds on the soil. So now I have a 6x10
Patch of dirt with 1000s of VBW seed imbedded. No doubt I’ll have future growth VBW in that same spot. My question is, do I wait for the seeds to germinate then hit with roundup again. Or should i just resod as I originally intended and spray the new growth with Celsius.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2542 posts

re: Virginia Buttonweed is killing me.....
quote:

The round killed that patch. It was actually 6x10. While removing the dead VBW, I noticed a ton of seeds on the soil. So now I have a 6x10
Patch of dirt with 1000s of VBW seed imbedded. No doubt I’ll have future growth VBW in that same spot. My question is, do I wait for the seeds to germinate then hit with roundup again. Or should i just resod as I originally intended and spray the new growth with Celsius.


If it were me I’d re-sod the bare spot now, and in late April/early May of next year when it re-emerges spray it with Celsius or MSM. VBW much easier to suppress/kill when it’s young, so learn to ID it when it’s young - plenty photos on the internet. Then, in my experience, you likely need to spray it a couple more times during the summer as new VBW plants emerge.


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