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unclejhim
LSU Fan
Folsom, La.
Member since Nov 2011
2901 posts

granular pre-emergent
What is the best granular pre-emergent. I have a large yard (40,000sq.Ft.+) of centipede so I'd really like to use granular. I used Dimension last year and had poor results.


lsujunky
USA Fan
3rd Rock from the Sun
Member since Jun 2011
1502 posts
 Online 

re: granular pre-emergent
I've used barricade in both granule and liquid. Both are nasty they turn everything yellow. The granules I put out with a push broadcast spreader and it stained pants, boots and spreader. The liquid stained the tank and hoses on my sprayer. Had good results with both the granules were easier to mess with in my small yard that I previous had. I still have a gallon or two of the liquid that I will have to use up at my new place. After that I my look at something that doesn't turn everything yellow.


PapaPogey
LSU Fan
Baton Rouge
Member since Apr 2008
38460 posts

re: granular pre-emergent
This is what I've been using for 3 yrs. Spring and fall.

Can find it pretty much anywhere locally in BR


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3418 posts

re: granular pre-emergent
quote:

What is the best granular pre-emergent. I have a large yard (40,000sq.Ft.+) of centipede so I'd really like to use granular. I used Dimension last year and had poor results.

When did you apply the Dimension?

I’ve used Dimension granular with excellent results but of course it was applied sufficiently early before winter weeds seeds germinated. I’ve also used Prodiamine granular (“Barricade”) with comparable results to Dimension - it was no better, but no worst, but it is a little cheaper. Dimension applied in late winter, very early spring can kill very young crabgrass after the seeds have germinated if one is a little late on the application, my understanding Prodiamine can’t do that.

FWIW, I’m using Specticle Flo (spray version) now - expensive, a good bit higher than Dimension or Barricade, at about $2.50 per 1000 sq ft of lawn application, but it does a better job on some weeds than does Dimension or Barricade. The granular version of Specticle, Specticle G, is a good bit more expensive per 1000 sq ft of lawn application than the spray version as I recall from my calculations.
This post was edited on 9/13 at 9:16 am


lsujunky
USA Fan
3rd Rock from the Sun
Member since Jun 2011
1502 posts
 Online 

re: granular pre-emergent
I have 1.5 acres now so doing granules could be pretty expensive.


LSUtigerME
LSU Fan
Walker, LA
Member since Oct 2012
2989 posts

re: granular pre-emergent
I just picked up some Prodiamine to put down this year. Plan to put it down in October.

quote:

…at about $2.50 per 1000 sq ft of lawn application… good bit more expensive per 1000 sq ft of lawn application than the spray version as I recall from my calculations.

Did you post these calculations before? I recall seeing a screenshot of a spreadsheet, with various herbicides and their cost/1000sqft but I cannot find it anywhere. I searched the various lawn care groups I’m on on FB and here but couldn’t find it again. It was very useful and I don’t want to recreate it.

If not, this would certainly be something useful to crowd source and make for a reference (ie. part of the H&G Board Sticky that is yet to exist).


CarRamrod
USA Fan
Spurbury, VT
Member since Dec 2006
54034 posts

re: granular pre-emergent
i know the granules you mix into liquid are relatively cheap. a huge jug will last multiple years for my 1/4acre yard


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unclejhim
LSU Fan
Folsom, La.
Member since Nov 2011
2901 posts

re: granular pre-emergent
quote:

When did you apply the Dimension?


I honestly cant remember, think it was in October...


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CoachChappy
LSU Fan
Member since May 2013
28691 posts

re: granular pre-emergent
quote:

I have 1.5 acres now so doing granules could be pretty expensive.



I'm in the same boat. I've been waiting to see what comes up and hitting it with MSM Turf and SedgeHammer. I've got the sedge just about licked, but VBW and Dallis grass are giving me the blues.


OysterPoBoy
USA Fan
City of St. George
Member since Jul 2013
25099 posts

re: granular pre-emergent
quote:

The granular version of Specticle, Specticle G, is a good bit more expensive per 1000 sq ft of lawn application than the spray version as I recall from my calculations.


The granular is about $100/bag and that will cover about 14,000 sq/ft for centipede grass by my rough calculation. I could be +/- about 1000 sq/ft. I didn't break out the calculator.

ETA: It says 2.9 lbs/1000 for centipede (17,000 sq/ft per bag)

4.6 lbs/1000 for bermuda (11,000 sq/ft per bag)
This post was edited on 9/13 at 9:52 am


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unclejhim
LSU Fan
Folsom, La.
Member since Nov 2011
2901 posts

re: granular pre-emergent
[quote] Dimension applied in late winter, very early spring can kill very young crabgrass after the seeds have germinated if one is a little late on the application, my understanding Prodiamine can’t do that.
[/quote

I'm going to give Dimemsion another try. When is the best time to apply?


Stellytiger
LSU Fan
Arnaudville
Member since Aug 2015
507 posts

re: granular pre-emergent
quote:

FWIW, I’m using Specticle Flo (spray version) now - expensive, a good bit higher than Dimension or Barricade, at about $2.50 per 1000 sq ft of lawn application, but it does a better job on some weeds than does Dimension or Barricade. The granular version of Specticle, Specticle G, is a good bit more expensive per 1000 sq ft of lawn application than the spray version as I recall from my calculations.


I’m starting to use Esplanade instead of Specticle Flo. Same AI just a higher percentage and cheaper


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20
lsujunky
USA Fan
3rd Rock from the Sun
Member since Jun 2011
1502 posts
 Online 

re: granular pre-emergent
I just laid 24 pallets of palisades zoysia and the rest is either dirt, button weed, sedge, crabgrass, barnyard grass, goose grass, dallisgrass, spurge and any other weed is south Louisiana with very little common Bermuda mixed in. I have a guy coming to power rake and hydro seed some double eagle rye for the winter on the dirt section and then next spring we will talk about hydro seeding the everything I didn't sod with zenith zoysia.


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10
CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3418 posts

re: granular pre-emergent
quote:

The granular is about $100/bag and that will cover about 14,000 sq/ft for centipede grass by my rough calculation. I could be +/- about 1000 sq/ft. I didn't break out the calculator.

ETA: It says 2.9 lbs/1000 for centipede (17,000 sq/ft per bag)

4.6 lbs/1000 for bermuda (11,000 sq/ft per bag)

At $100 per 50 lb bag, $2 per lb, times 2.9 lbs per 1000 sq ft (centipede or St Augustine), $5.80 per 1000 sq ft.

I paid $254 for a 18 oz fl oz bottle Specticle Flo at Site One in March. $14.11 per fl oz. Application rate per label for centipede and St Augustine is 6 fl oz per acre, or 0.138 fl oz per 1000 sq ft which equates to about $2.00 per 1000 sq ft ($14.11 x 0.138) for Specticle Flo (spray version). - I was off 50 cents per 1000 sq ft, I was trying to recall from memory

So roughly 1/3 the cost per 1000 sq ft for the Specticle Flo (spray) vs Specticle G (granular).

The 18 oz bottle will last me 3 years for 3 sprays per year on my roughly 10,000 sq ft of lawn or 4 years with 2 sprays per year.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3418 posts

re: granular pre-emergent
quote:

I'm going to give Dimemsion another try. When is the best time to apply?

According to the turf weed extension specialist Dr. Ron Strahan, LSU AgCenter, mid- to late Sept for the fall application for south Louisiana. So any time now.

It needs to be applied and watered in before soil temperature cools to 70 F - the germination temperature for many winter weed seeds. Better to apply a little too early than a little too late.
This post was edited on 9/13 at 11:22 am


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3418 posts

re: granular pre-emergent
quote:

Did you post these calculations before?

No I’ve not posted a spreadsheet on costs per 1000 sq ft on this before for the various herbicides.

I’ve put my calculated cost per 1000 sq ft as applicable in various posts depending the thread and herbicides discussed. But sure someone could do this.

But cost for the for the same herbicides differ a good bit for the product depending on the brand/manufacturer and where you buy them, and application rates can differ among grass types. So when I post my costs per 1000 sq ft I try to make sure I state how much I paid for the product, the quantity (oz or pounds) I purchased, and where I bought it from.
This post was edited on 9/13 at 10:58 am


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10
PillageUrVillage
LSU Fan
Mordor
Member since Mar 2011
11920 posts

re: granular pre-emergent
quote:

It needs to be applied and watered in before soil temperature cools to 70 F - the germination temperature for many winter weed seeds. Better to apply a little to early than a little to late.


When you say watered in, does this only apply to granule applications? Or do WDG spray applications also need to be watered in?

I’ll be using Prodiamine 65 WDG for the first time this year. I plan to do half of the yearly max in the fall, and the other half split applications in the spring. I’ve been monitoring my soil temp and it’s been averaging mid to upper 70’s. So I figure it won’t be long until I’ll need to put it down.

I guess I’m mostly curious about the ideal weather for the application because of all of the upcoming rain.


CrawDude
LSU Fan
Baton Rouge
Member since Apr 2019
3418 posts

re: granular pre-emergent
quote:

When you say watered in, does this only apply to granule applications? Or do WDG spray applications also need to be watered in?

All the pre-emergents need to be watered in whether granular or spray. It will state so on the product label and time allowed to elapse before the product has to be watered in. The active ingredient needs to be washed into the soil where the weed seeds are. .

I like to apply the pre-emergents before an anticipated rain - I hate watering the lawn. Same with fertilizers. ETA: I won’t apply them before an anticipated deluge, but a 1/2 to 1 inch rain is ideal.
This post was edited on 9/13 at 12:18 pm


PillageUrVillage
LSU Fan
Mordor
Member since Mar 2011
11920 posts

re: granular pre-emergent
Good info. Thanks.


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OysterPoBoy
USA Fan
City of St. George
Member since Jul 2013
25099 posts

re: granular pre-emergent
quote:

I paid $254 for a 18 oz fl oz bottle Specticle Flo at Site One in March.


They only had gallons when I went last week.


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