Re: Re RoundUp?

**N* S* <s*@earthlink.net>**

Doreen, I am very anti Roundup, however have used it with a paintbrush  
on Canadian Thistle. I do not spray it.  I did a Google search on the
use of vinegar to see if boiling it down would increase the pH .  
Answer is no. Rats. While thistle is very sensitive to it and  will
top kill almost immediately it does not translocate and  kill the  
roots. Thanks to snow cover all winter we had a shallow freeze and my  
thistle went
bananas over the winter as did bind weed.  I will be using the vinegar  
but expect the thistle to return. The recommendation is to let it get  
4 to 6 new leaves and
then hit it again and again and again. Eventually you will win out.  
Nancy -

Sandy, It should not surprise you that Michigan Master Gardeners  
recommend the use of Roundup and the generic Pronto. Hortheads at MSU  
love the stuff
and teach its use in the Master Gardener Manual. N
On Jul 1, 2011, at 3:30 PM, Doreen Howard wrote:

> My bad for using it on those blasted thistles, as I was desperate.   
> BTW,
> Chris' tip on the white vinegar worked!  I sprayed the thistles last  
> evening
> and today they're are almost dead!!  Hooray!
>
> About Round-Up.  I quit using it years ago when I discovered that  
> the salts
> persisted in soil and were transferred by the roots of dying weeds.   
> I read
> a study in an obscure scientific journal, one of the 100's my  
> husband reads,
> after he pointed it out to me.  Root transfer was terrifying to me  
> and bad
> for the soil food web, so I immediately stopped using the stuff.  I've
> mulched thickly and pulled a ton of weeds since.
> Doreen Howard
>
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Nancy Szerlag
Columnist for Detroit News
szerlag@earthlink.net

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