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FishinTygah84
LSU Fan
LA
Member since Dec 2013
1550 posts

Weed N Feed with Torpedo Grass
My question is 2 fold. 1.) is it too late for weed N Feed?

2.) I brought in some dirt about 1 1/2 years ago that was apparently riddled with torpedo grass. It has taken over about of my front yard (which is centipede). Should I weed n feed that? Or is there something else I should do? There are a bunch of weeds as well. It’s actually really discouraging. My yard was so perfect about 2 years ago. Had some low spots and brought it dirt. All down hill from there


PillageUrVillage
LSU Fan
Mordor
Member since Mar 2011
10769 posts

re: Weed N Feed with Torpedo Grass
Glyphosate is the only thing I know of that actually kills torpedo grass. And you have to spray it several times to make sure it’s dead. This will also kill your grass. Kill it all, lay some sod over the dead spots when you’re done.


specchaser
LSU Fan
lafayette
Member since Feb 2008
2137 posts
 Online 

re: Weed N Feed with Torpedo Grass
i am no expert but in my experience you don't get rid of torpedo grass unless you burn your yard with fire and even then you may not get rid of it.

it took over a section of my yard a year or two ago and I just dug it up and replaced it with fresh sod. I don't think weed and feed will accomplish anything. you just need your good grass to fill in to where the torpedo isn't really noticeable.


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TheBoo
Nicholls St. Fan
South to Louisiana
Member since Aug 2012
2840 posts
 Online 

re: Weed N Feed with Torpedo Grass
Only two chemicals I know of that will kill it. Glyphosate, and Quinclorac.


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BallsEleven
LSU Fan
Member since Mar 2019
2435 posts

re: Weed N Feed with Torpedo Grass
If it’s over that big of an area of your yard and you really want it gone, your only chance is to start over completely.

You’ll have to do multiple rounds of glyphosate to kill everything. Scalp and bag to clear all the debris. Then start the new lawn.

Even then you may still have torpedo but at least it will be manageable.

Also, I’d think centipede is slow growing and will keep getting taken over by the torpedo.


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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2559 posts
 Online 

re: Weed N Feed with Torpedo Grass
Sethoxydim (sold under different brand names, like Fertilome Over-the-Top 11, Vantage, Hi Yield Grass Killer, Bonide Grass Beater 11) can “control/suppress” torpedograss in centipede - it will not eliminate it.

I’d personally recommend spraying your lawn weeds with a post-emergent herbicide and not use weed & feed at this time. Consider the MSM Turf herbicide discussed in the other threads. Fertilize the centipede as a separate activity. You in south LA - your centipede greened up yet?


FishinTygah84
LSU Fan
LA
Member since Dec 2013
1550 posts

re: Weed N Feed with Torpedo Grass
i do. No it's starting to. I'm so mad about this torpedo grass. i saw people on TD talk about it for years and felt so lucky i didnt have to deal with it. That luck has ended.


ronk
Member since Jan 2015
2367 posts

re: Weed N Feed with Torpedo Grass
Just my opinion on torpedo grass if it was in my lawn. I'd go scorched earth and start over. Glyphosate concentrate mixed at a higher rate. I'd spray everything and wait two weeks. Spot treat torpedo grass that popped back up, wait two more weeks, and then resod.


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CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2559 posts
 Online 

re: Weed N Feed with Torpedo Grass
quote:

i do. No it's starting to. I'm so mad about this torpedo grass. i saw people on TD talk about it for years and felt so lucky i didnt have to deal with it. That luck has ended.

Yeah, I’ve been lucky in past years using river silt to fill in low areas and not had torpedograss, but I’ve followed all these threads on those with torpedo grass and now when I need to fill low areas I’m purchasing mason sand - not going to take the chance - and many on this board are providing that recommendation for those asking about filling in low areas of their lawn for this very reason - to avoid torpedograss at all costs.

Back to the lawn fertilizer, b/c centipede greens up a little later than the other grasses, I usually wait until early April (Baton Rouge) and cutting my lawn twice (cutting actual grass not weeds to tidy up the look) before I apply lawn fertilizer. Actually I’ll fertilize my centipede next week. Personally, I’d be real cautious applying a weed and feed product as these temps are rising.



TheBoo
Nicholls St. Fan
South to Louisiana
Member since Aug 2012
2840 posts
 Online 

re: Weed N Feed with Torpedo Grass
Don't mean to hijack this thread from you OP, but Crawdude and Ronk, I have a question: My front yard is Centipede and my back yard is St. Aug. Mainly the back, but both need to be rejuvenated. I'm aerating this weekend and was contemplating getting a power rake also to dethatch first. Yard needs both. Do y'all think that I'd be alright just aerating this weekend, then dethatch in the fall, or bite the bullet and do both now? I'm not one to let things linger, however I've heard from people I know that core aerating will help break up the thatch and improve the decomposition process also. TIA.


ronk
Member since Jan 2015
2367 posts

re: Weed N Feed with Torpedo Grass
This one is really up to what you feel like doing. An aeration is the healthiest thing that you can do for you lawn. Breaks up compaction, root prunes the grass, allows water and nutrients to be exchanged at a root level, reduces the thatch layer. The St Aug is going to benefit more from the dethatching than the centipede will. You can certainly do both or only aerate and then dethatch later.

I would suggest that if you have a heavy clay yard you add some organic material after aerating. Getting the microbes in the soil will help improve your soil profile.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
2559 posts
 Online 

re: Weed N Feed with Torpedo Grass
quote:

I have a question: My front yard is Centipede and my back yard is St. Aug. Mainly the back, but both need to be rejuvenated. I'm aerating this weekend and was contemplating getting a power rake also to dethatch first. Yard needs both. Do y'all think that I'd be alright just aerating this weekend, then dethatch in the fall, or bite the bullet and do both now? I'm not one to let things linger, however I've heard from people I know that core aerating will help break up the thatch and improve the decomposition process also. TIA.

Just opinion. Certainly aerate both. May want to sprinkler irrigate the lawn a day or 2 before to help soften the soil to help the aerator core tines to penetrate the soil.

On dethatching which I’ve never done, it’s my understanding from reading university written fact sheets that centipede doesn’t respond as well to traditional detaching, perhaps because of the slow growth or people often not to do it properly? Perhaps the aeration/aerification is sufficient on the centipede. Read up a little more on de-thatching centipede, or someone can offer their personal experience having de-thatched their centipede lawn. Or shoot an email to Dr Ron Strahan, turf and weed specialist, LSU AgCenter rstrahan@agcenter.lsu.edu for his recommendation and follow his advice.

On St Augustine, again, I read where that should be done when grass is in very active growth, maybe a bit early, perhaps May/June might be a more favorable time to consider doing that activity. St Augustine because it grows so fast would likely recover and fill pretty quickly.

Ronk, I’m sure has more knowledge on dethatching than me.

Here is a LSU AgCenter fact sheet on de-thatching LINK; another from Clemson. LINK
This post was edited on 3/26 at 4:07 pm


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CenlaLowell
UMass Fan
Alexandria, la
Member since Apr 2016
610 posts

re: Weed N Feed with Torpedo Grass
Not gonna fricking happen
This post was edited on 3/26 at 2:45 pm


bigbuckdj
LSU Fan
Member since Sep 2011
1082 posts

re: Weed N Feed with Torpedo Grass
Man, this thread got me interested. Now I realize I have a lot of frickin torpedo grass.


Art Vandelay
LSU Fan
LOUISIANA
Member since Sep 2005
8753 posts

re: Weed N Feed with Torpedo Grass
Move


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humblepie
LSU Fan
Member since May 2008
435 posts

re: Weed N Feed with Torpedo Grass
Quinclorac works but it will be a slow battle. As in you need to spray weekly for a long time and your turf will likely suffer a bit but it's worth it.


TheBoo
Nicholls St. Fan
South to Louisiana
Member since Aug 2012
2840 posts
 Online 

re: Weed N Feed with Torpedo Grass
Thanks for y’all input. Dethatching would be for the st aug as the centipede doesn’t look like it needs it. It’s this yard’s 6th year so the st aug needs it. The topsoil is actually pretty good for the first 4 inches or so up until about 10 feet from the back of back of the property. I can probably get away with top dressing where it needs it. Looks like I’m aerating this weekend then dethatching later in the year. I appreciate y’all helping me make that decision!


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Daponch
Da Nortchore
Member since Mar 2013
695 posts

re: Weed N Feed with Torpedo Grass
Torpedo grass in turf = Bobcat method


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ronk
Member since Jan 2015
2367 posts

re: Weed N Feed with Torpedo Grass
Quinchlorac will kill centipede with the amount of applications you’ll have to use to kill the torpedo


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