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

[Kathi Mestayer]

you can’t get the Extension Service docs?
Or are you talking about other ones?
If you need me to search for a couple of academic docs online, let me know and I’ll take a look.
k

Kathi Mestayer
KMA Consulting
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Williamsburg, Va 23188
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757-229-6575
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"These days, “more powerful = more complicated.”
- Mac Mestayer

> On Oct 18, 2017, at 9:37 AM, Kirsten Johnson <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
>> Web: doee.dc.gov <http://www.doee.dc.gov/>
>>  
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