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Weed control, management, ecology, and minutia
by J Bern Hunt
on September 29, 2014 at 1:24 PM
This article needs to be updated. The information about glyphosate having little or no residual activity in the soil is proving incorrect. Now, soil scientists are seeing reduced micronutrient levels because the glyphosate is acting as a chelate, bad bacteria is on the rise, and the list goes on. There is new info out there... check out some of the studies that have done by the USDA.  
Thanks, J
by Brad Hanson
on September 29, 2014 at 2:13 PM
Hi J,  
I appreciate your comments but I think you may have misunderstood this post as there was no reference to glyphosate having residual activity in the soil although it did make a comparison to that herbicide compared to some "natural" products. Regarding the issues you raise about residual activity, micronutrient chelation, and bacteria on the rise, I have seen very little compelling scientific evidence to support those claims. What I have seen is generally not backed by peer-reviewed science, has not been reliably repeatable in subsequent research, or occurs in such specific conditions as to be an anomaly rather than representative of the whole.
by Al Hoove
on June 4, 2015 at 12:52 PM
J Bern Hunt: residual activity in the soil vis a vis herbicides refers to pre-emergence herbicidal activity. Glyphosate has no pre-emergence herbicidal activity.
by Denise Lawungkurr Goodfellow
on May 10, 2016 at 11:30 PM
For some years I've been using household vinegar (5%) on a range of transformer weeds and it's killed each and every one.
by Bob Randall, Ph.D.
on May 25, 2016 at 3:01 PM
Glyphosate, the active ingredient of the herbicide RoundUp is patented as an antiparasitic agent and non selective antibiotic Glyphosate kills bacteria at 1 ppm. It was patented by Stauffer Chemical in 1964 as a metal chelator for pipe cleaning (U.S. Patent 3,160,632 Stauffer Chemicals 1964). It kills plants and bacteria by chelating metal . Although apparently non-toxic to mammals, it is a potent intestinal micro-biome disrupter so could if consumed even in small amounts have grave health implications to the extent the microbiome is important. See the review about the microbiome & health in Scientific American  
Given that, it shouldn't be used where it might get onto the edible portion of a food plant.
by David Kucher
on October 19, 2016 at 5:50 AM
Given that Vinegar is an antibiotic, a metal chelator and also a very effective pipe cleaning agent, should we not view it with the same irrational fear as glyphosate?
by Christine McIntyre
on April 12, 2017 at 7:39 PM
Some here would do well to familiarize themselves with the work on glyphosate of Dr. Stephanie Seneff, Senior Research Scientist at MIT.  
-edited to remove hyperlink  
-Editors note: Dr. Seneff's training includes a BS in Biophysics, an MS and EE in Electrical Engineering, and a PhD in Electrical Engineering and Computer Science. In recent years, she has coauthored a number of papers exploring links between glyphosate and human health problems.
by mike ashlock
on February 9, 2018 at 8:06 AM
A description of the "Total Time to Weed" treatment chart would be helpful for comparison of time to treat and what it means. For instance "3 times" refers to what? , How is mulched/mulching compared to other treatment in timing? , How does "untreated" take any time at all?
Reply by Brad Hanson
on February 9, 2018 at 8:12 AM
Hi Mike,  
I believe those data are "amount of time it takes for three handweeding operations (minutes per plot)". So, untreated plots with no weed suppression would be the weediest and would take the longest to go through and remove all the weeds by hand.  
Looks like mulch was similarly suppressive compared to the glyphosate treatment (~2 minutes hand weeding per plot) while the others were poor (15-20 minutes hand weeding per plot).  
Hope that helps.  
by Paul Reeve
on June 20, 2018 at 11:51 AM
I noted above that Earthtone 4n1 herbicide is a possible choice. I would point out the very poor quality studies about the safety of maleic hydrazide, the grown and sprouting inhibitor, that qualify that substance through our negligent USDA approval for that material on potatoes and other crops as a shelf life extender, the studies on mammals that should indicate extreme caution in the use of maleic hydrazide (Come on, now, do you think that everybody who uses that product would use a proper respirator? Note that it is the vapor or spray and lung path that makes maleic hydrazide the most dangerous.) BTW, I use that chemical to control invasive bamboo from a negligent neighbor's planting along one-1/2 property lines.
by Nancy
on September 25, 2018 at 7:06 AM
Scythe what is this product and is it truly safe and natural. I’ve been in search of a product that is safe fir a condo unit. Thank you
by Berkeley sewer replacement
on October 25, 2018 at 7:29 AM
What a cool blog and great article. Cheers to the author for your awesome idea and valuable information. Truly looking forward to reading your next post.  
--Berkeley sewer replacement
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