Cardamine hirsuta
Mon, 01 Apr 2013 18:07:04 PDT
Having used roundup on a commercial scale for many years let me make some  
comments. First roundup is something like a synthetic sugar. To work the 
plant  has to absorb the roundup through pores in leaves and sometimes green 
stems.Once  inside the plant it poisons it inside out. It is not absorbed 
through woody  tissue or tree bark. ROUNDUP DOES NOT STIMULATE THE GROWTH OF 
SEEDS!! In nature  many grasses give off chemicals from the roots that inhibit 
the germination of  other weed seeds. When you spray your area that is 
probably loaded with grass  the seed inhibitor quits being produced. That is why 
you suddenly have an  explosion of other baby weeds sprouting. If you call 
the makers of roundup(  Monsanto chemicals) they will tell you that after 
about one week any roundup in  the soil disintegrates into "nothing". It turns 
into a harmless nontoxic  chemical. It drives me crazy when I hear goofy 
stories like roundup stimulating  seed germination because it does not! I do 
not know where theses stories start  but lets get are facts straight.
Many times after I used roundup in an area rain will wash it off the  
leaves. It needs some hours to penetrate into the leaf pores ( called stomata).  
I have found the premixed sol MON .makes doesn't work very well . Buy a 
quart of  the concentrate and mix to direction and add one teaspoon of dawn for 
dishes to  the mixture. Spray away. You must wet the leaves for this to 
work.. Now if you  are healthy and have A LOT OF FREE TIME you can remove weeds 
by hand. Have you  ever hand removed weeds from 1/4 acre. It will give you a 
new outlook on life  and help prepare you for the Olympics! After you 
almost drop dead trying this  method you will find why a lot of people grow their 
plants in pots. Use steam  sterilized potting mix and you will kill any 
weeds in the mix. The mix can also  be gently heated in an old turkey roasting 
pan in the oven.
 Let me add I greatly admire people that hand weed. It is good  exercise 
and harmless to nature. I truly hope I have not offended anyone but we  must 
get our facts straight. There are some very nasty weed/bug killers out  there 
and I don't care to poison the area where I live. If anyone needs help  
with the use of chemical weed killers they may contact me. As a retired  
commercial grower I am sure there isn't anyone in our group with more experience  
using them. Just imagine controlling weeds on 75 acres.Russ H. at
In a message dated 4/1/2013 2:55:37 P.M. Pacific Daylight Time, writes:

Dear Christian, 

Just today an amateur  gardener friend asked me to identify a plant that 
was beginning to invade his  yard from his neighbors. It is our local 
Cardamine sp. C. bulbosa? Here it is  called "bitter cress."  It is one of the 
nastiest weeds that I have  encountered here. I do not use Roundup, but I have 
found that hand weeding has  some effect on it. The problem with our species 
is that, if you don't root it  out before it goes to seed, you have lost the 
battle because it shoots out the  seeds when the pods are ripe. 

I would eat it , except that it is  extremely bitter, even when it is 

And  if I had an  infestation of Worsleya, especially the white one, or of 
the pink Pamianthe,  or the red Hymenocallis, I think I would probably also 
choose hand weeding.  

Dell in SE Pennsylvania 

----- Original Message  -----

From: "Christian Lachaud" <>  
Sent: Monday, April 1, 2013 5:22:21 PM  
Subject: [pbs] Cardamine hirsuta 

Dear all, 

I would like to  ask your advise about Cardamine hirsuta. 

Few gardener friends and I  have noticed that roundup herbicide activates 
the seeds of Cardamine  hirsuta, that are asleep in the soil (by the way, I 
ignore how long the  seeds of this plant survive asleep). 

In areas that were free of  Cardamine the previous years, treated with 
roundup during the summer, a  dense population of this plant is sure to be 
found next spring. However,  this burst has nothing to do with cleanness of 
the area after herbicide  application, because other places manually weeded 
will never exhibit the  phenomenon. Roundup application and Cardamine 
infestation is so highly  correlated that people here use to say that 
roundup "makes it come".  

I know that there has been some cases of genetic pollution from GMO  into 
wild species through pollen. I ignore if some GMOs requiring roundup  to 
their seeds activated do exist ? If yes, wouldn't this example be  one such 
case of genetic pollution accident ? Have people observed this  phenomenon 
elsewhere in the world ? 

It is worth asking the  question since some people eat Cardamine hirsuta 
advertise it as  delicious. However, if it had been turned accidentally 
a wild GMO  requiring roundup to wake up and grow, would it be that safe 
human  health ? 

Any comments, ideas, and tracks will be much appreciated -  Many thanks. 

*Dr. Christian M. Lachaud, PhD* 
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