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  #11  
Old 04-11-2008, 12:46 PM
Marcos Marcos is offline
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Join Date: Aug 2007
Location: Cincinnati OH
Posts: 3,756
Originally Posted by Marcos
This suggestion was a mistake on your part.

A "pre-m" applied to the lawn will only prevent non-germinated annual weeds.

Dandelions are PERENNIALS.

Quote:
Originally Posted by Runner View Post
Actually, a pre-emergent prevents the growth of both annuals AND perennials.
O.K. fine..point taken.

Pre-M, Dimension, Barricade all have mostly annual grasses and broadleaves on the label...with a FEW perennial broadleaves...mainly the ones that are the more shallow-rooted.

But this thread was begun by the fellow talking about dandelions, and suggesting trying to prevent them with a standard turf pre-emergent in February !

That's a different animal !

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There is one good pre-emergent for tough-to control perennials like dandelions: Dow's 'Gallery' herbicide.

http://www.cdms.net/ldat/ld638005.pdf

But the large-scale use of it, in turf at least, just isn't cost-effective for the vast majority of business owners.

Gallery is really sort of the "crem'e-de-la-crem'e" of landscape pre-emergent products, that found a niche in certain higher-end, cost-is-no-factor turf situations, ususally on estates, higher-profile cemetaries, etc.
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  #12  
Old 04-11-2008, 02:50 PM
Happy Frog's Avatar
Happy Frog Happy Frog is offline
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Join Date: Aug 2007
Location: Navarre, FL
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I am interested about this subject as well.
Bought some Atrazine last year and was gonna try it this year. I may have waited too long but was thinking of using it now.
I have Centipede which was over-seeded (my bad) with annual rye last fall.
The weeds are starting to wake up so here come the Atrazine...
Any suggestions?
BTW: this is for my own yard
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