Roundup was Cardamine hirsuta

aaron floden
Thu, 04 Apr 2013 09:57:47 PDT
One only needs to explore the literature. Germination tests were done on various weeds in the 1970's in lab settings. Of a few things sampled, most showed no differences when the seeds were treated with glyphosate. Amaranthus retroflexus showed increased germination. Replicate these experiments and see what happens with Cardamine hirsuta. More than likely, the germination of this plant is due to increased light.

 Plants treated with glyphosate that produced seeds showed reduced germination and juvenile mortality --- that variegation so prevalent in roundup sprayed plants is seen in seedlings of plants sprayed by it. One of the other uses of roundup is for harvesting. Spraying a field of non-Ru-ready crops kills them so they can all be harvested at once. The seeds of these plants have roundup in them.

 Another issue with roundup is the increased susceptibility to fungal pathogens of all plants in areas sprayed. Lab tests have shown no effects on growth, + or -, of fungi though....

 In my area Roundup is dumped by buckets along road medians to kill vegetation. Last year I saw this about 100 meters away from the Powell River in Tennessee.


--- On Fri, 4/5/13, lou jost <> wrote:

From: lou jost <>
Subject: Re: [pbs] Roundup was  Cardamine hirsuta
Date: Friday, April 5, 2013, 12:25 AM

Nhu's suggested experiment is a goods first step to answering the question of Roundup's effect on seeds. An actual controlled experiment is not merely "scientific window-dressing"  but a prerequisite for reliable discussion of the subject. There are other factors that could be involved rather than the direct action of Roundup on seeds; it could be that the suddenness of the increase in light after spraying is the trigger, or maybe something that the dying grass releases after being killed by Roundup but not after being killed by other means, or maybe some other mechanism. There may well be other observations that rule out some of these other factors, but a nice simple experiment like Nhu's would go far towards making this a better discussion. 

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