On Apr 21, 9:29*pm, Eggs Zachtly wrote:
Lawn Guy said:

Eggs Zachtly wrote:

Dimension:

(...)

Exact enough?

I should have been more clear. *

What I meant to ask was, is Dimension the same as Dithiopyr? (which my
recent research indicates that it is).

Yes. They're all the same.



*What is "Halts" ?

Scott's tradename for their pre-emergent.

Is "Halts" another name for Dithiopyr?

In a word, yes.



If so, then how come it's got so many names? *

You still pay for the tradename "Roundup", don't you.

How can (or why does)
Stott's use two trade names (Halts and Dimension) to refer to the same
chemical (Dithiopyr) ?

Maybe you should ask Scott's. I answered your question exactly. "Halts" is
a tradename that Scott's uses for the pre-emergent that they put in their
Step 1 fertilizer. The chemical name is Dithiopyr. It was developed by
Monsanto in 1991. Dimension is a registered trademark of Dow AgroSciences..
It's the same product.



2) How does the efficieny or longevity of this product change
* *or improve or degrade in relationship to rainfall after
* *application?

It needs to be watered in to work. In a nutshell: You put down the
granules and when they come in contact with water, they dissolve,
forming a barrier. *Germinating seeds can't penetrate that barrier

I think that's a corny and technically incorrect explanation. *

It's not "technically incorrect". It's exactly what happens when you use
the product you're asking about. You obviously wouldn't understand a more
technical explanation, and I suggest you spend a little time reading MSDS
on products, as well as thoroughly reading labels, instead of trying to
argue about things on usenet that you know little of.

I have found a better one:

No, you haven't. You've found an explanation of a completely different form
of Dithiopyr. You state so yourself, below your source.







* -------------
* The active ingredient in Dimension (dithiopyr) enters the
* crabgrass plant through its roots, shoots, crowns and leaves.
* The major site of physiological activity is within developing
* plant tissues found in the growing points.The mode of action
* is inhibition of mitotic cell division, or the inhibition of
* cell development and growth.

* Dimension must come in contact with young, exposed plant
* meristems in roots and shoots.This explains the selectivity
* between surface germinating weeds such as crabgrass and the
* exceptional safety to established turfgrasses.
* --------------

Source:

http://www.dowagro.com/webapps/lit/l...h=ca/pdfs/nore....

That information pertains to a liquid (sprayable) version of Dimension,
and not the granular version as sold by Scotts (that includes
fertilizer).

Exactly. It's *not* the same product. So, why are you trying to use it's
description in lieu of what you've been given. Dimension 2EW is water
soluable. They also make Dimension Ultra 40WP. It's also water soluable,
and only available to commercial applicators (I think we're all thankful
that you're not one).



Given that this dimension must be solubalized (dissoved) in the soil to
the extent that it must be in contact with (and taken up by) the
emerging crabgrass plant, I don't understand the prohibition against
later raking or aerating (coring).

Then go for it. Put down the halts. Then aerate your lawn. Then cry to
Scott's when your crabgrass emerges. They'll laugh at you.



There is some mention that while the application time for Dimension is
very early in the spring, it's not necessarily the best time to be
giving fertilizer to your lawn. *So I wonder why they incorporated
fertilizer into this product. *

It's called marketing, moron. Damn, you're *still* a clueless ****.



PS: *I've been buying fertilizers and herbicides for my lawn for the
past 10 years (here in Ontario) and I don't think I've ever seen this
"Halts" product (or any crab-grass control product) for sale here until
last fall. *Are these products (that includes Dimension, or "Halts")
relatively new for the home-owner market?

No.

--

Eggs

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- Show quoted text -

I guess that about covers it.