[MAIPC] Glyphosate's effects on trees and soil microbia

[Kathi Mestayer]

yes; I recall reading years ago that a study that reported bad effects on amphibians (and got a lot of press) applied the glyphosate in ways that were not in concert with the labelling and other instructions (too close to standing water, too much applied)>  
k

Kathi Mestayer
KMA Consulting
105 Gilley Drive
Williamsburg, Va 23188
kwren at widomaker.com
757-229-6575
757-229-9396 (fax)

"These days, “more powerful = more complicated.”
- Mac Mestayer

> On Oct 18, 2017, at 9:45 AM, Stephen Hiltner <stevehiltner at gmail.com> wrote:
> 
> One factor to consider is quantity. Do the studies test response according to quantity applied? My experience with the anti-glyphosate movement is that it doesn't discriminate between massive applications on farms and much smaller, more targeted applications for habitat restoration. 
> 
> Steve
> PrincetonNatureNotes.org <http://princetonnaturenotes.org/>
> NewsCompanion.com <http://newscompanion.com/>
> 
> On Wed, Oct 18, 2017 at 9:37 AM, Kirsten Johnson <kirsten2622 at comcast.net <mailto:kirsten2622 at comcast.net>> wrote:
> 
> Sorry I can’t help with the glyphosate question - but FYI - you can get a free account with Jstor that allows you to search and read on line, plus save 3 items at a time on your ’shelf.’ Go to the jstor homepage and click “register." You cannot print. However, I have found that articles I’ve first located on jstor are sometimes printable from elsewhere on line. 
> 
> Kirsten
> 
>> On Oct 18, 2017, at 9:17 AM, Ossi, Damien (DOEE) <damien.ossi at dc.gov <mailto:damien.ossi at dc.gov>> wrote:
>> 
>> I am trying to convince the land managers in my city (Greenbelt, MD) to start managing the invasive plants on some of their land.  I am getting some pushback from a community group that says there’s proof that glyphosate will kill or damage trees and soil biota.  I’ve been looking for published papers that would support of refute their arguments, but have been unable to find much. (I don’t have access to JSTOR, BioOne, etc.) 
>>  
>> They are citing the following documents: 
>>  
>> (1) Pennsylvania Extension Service:  Tree roots absorb glyphosate; it has a much longer half-life than when it is in the soil.  A single glyphosate application results in ,persistent stunted leaf growth. https://extension.psu.edu/use-glyphosate-with-care-near-trees <https://extension.psu.edu/use-glyphosate-with-care-near-trees>
>>  
>> (2) Michigan Extension Service: Herbicides that touch the bark of mature, healthy trees may be absorbed by the outer bark and negatively affect the adjacent vascular tissue. http://msue.anr.msu.edu/news/be_careful_where_you_spray_that_stuff <http://msue.anr.msu.edu/news/be_careful_where_you_spray_that_stuff>
>>  
>> (3) Glyphosate interferes with the ability of tree roots to absorb manganese, zinc, iron, and boron from the soil; resulting in root rot, reduced cold hardiness, and reduced drought hardiness. http://homeguides.sfgate.com/effect-glyphosate-tree-roots-29076.html <http://homeguides.sfgate.com/effect-glyphosate-tree-roots-29076.html>
>>  
>> Does anyone have any resources that address these issues, or is there any known comprehensive document that reviews and summarizes independent research on the effects on glyphosate in forest ecosystems?
>>  
>> Thanks,
>>  
>> Damien
>>  
>> Damien P. Ossi
>> Wildlife Biologist
>> Fisheries and Wildlife Division
>> Department of Energy & Environment
>> Government of the District of Columbia
>> 1200 First Street NE, 5th Floor
>> Washington, DC 20002
>> Desk: (202) 741-0840 <tel:(202)%20741-0840>
>> Web: doee.dc.gov <http://www.doee.dc.gov/>
>>  
>> _______________________________________________
>> MAIPC mailing list
>> MAIPC at lists.maipc.org <mailto:MAIPC at lists.maipc.org>
>> http://lists.maipc.org/listinfo.cgi/maipc-maipc.org <http://lists.maipc.org/listinfo.cgi/maipc-maipc.org>
> 
> _______________________________________________
> MAIPC mailing list
> MAIPC at lists.maipc.org <mailto:MAIPC at lists.maipc.org>
> http://lists.maipc.org/listinfo.cgi/maipc-maipc.org <http://lists.maipc.org/listinfo.cgi/maipc-maipc.org>
> 
> 
> _______________________________________________
> MAIPC mailing list
> MAIPC at lists.maipc.org
> http://lists.maipc.org/listinfo.cgi/maipc-maipc.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.maipc.org/pipermail/maipc-maipc.org/attachments/20171018/e05ba811/attachment.html>