Another non-pro question: How do you pros view the importance of the understory?

Location
Dunwoody
I had to resist piling on more complaints to that 1st question. This is very-much related to the other, but I think it deserves a new thread of its own:

Soon after the sidewalks were installed on our heavily tree-lined street 5 years ago, the verge (or whatever it's called) & the slope next to it were planted with periwinkle. The next spring I began what turned out to be a protracted battle with some new, unknown (to me) weeds, whose seeds had obviously hitchhiked along with the new plants. At 1st there weren't all that many & they were easily eradicated by pulling. There was one, however, some kind of grass with shallow roots, easily pulled, that seemed to keep popping up. Last year, spring 2017 (about 3 1/2 yrs after 1st appearing) I noticed it had not just shown up along the sidewalk, but was here & there in places like our little herb garden and especially under the trees that cover more than half our little lot. So it was then, finally, that I went googling to see if I could identify it. I thought it would be difficult, but in little time I came across the wide-spread topic of "non-native, invasive plants" and met the name of our seemingly "innocuous", shallow-rooted little weed: stiltgrass. Or also known by other names, like Japanese stiltgrass. I told the neighbors to watch out for it & be sure to pull it if they found it, which they did.

This year we had stiltgrass everywhere, despite all my previous weeding attempts. It was spread throughout the lawn areas and in every part of our tiny but cherished understory. I went looking further, over a nearby bank leading down to a small stream, and then up & down the street. It was on almost everybody else's property, too, and all along the street, plus had already been on other streets or had spread from ours to theirs or vice versa. After reading up more on it, I realized we had the 1st real infestation of stiltgrass in our county, and naturally wanted to notify others to be vigilant in weeding it out, including the city and county. It still seemed possible that it could be eradicated by pulling, & then making sure it didn't return & have a chance to go to seed in the fall.

Surprise! - not. The county has yet to respond and the city arborist says that grass is not within her area of expertise. I tried to tell the transportation engineer to tell her (Cryminy!) that she needed to care about the stiltgrass, because if she bothered to read up on it, she would see how it negatively (catastrophically) affects forest understories, and those understories are critical to the health of the trees themselves. But I think I'm gonna have to go try to hunt her down personally to stop the pointless communication (or lack thereof) through others. Or better, just write a letter.

So... after all that, to the point: If your area had an infestation of the completely useless, horribly invasive & terribly damaging weed known as stiltgrass and it was spreading to the understories of the residential lots' many trees, as arborists would you consider it a potential problem to the future health of the trees?

Just wanted the opinion of some people whose opinions I actually respect. Thanks again!
 
Who is this lady arborist??? While I agree grasses are not really in the forefront of what we do, any invasive plants should be on our radar as well as contact information for those who are the experts in that realm. I think I would get on the next city council meeting agenda to make a complaint about this situation and this person.
 
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Well, guess it's no secret. Her name is Amanda Corr, "City Arborist" for Dunwoody, Georgia. I'm not sure what credentials are required to be an official Arborist. Oldoakman's question made me curious enough to look at her linkedin page, in which she claims to be a "people person" who really really cares about the environment. And she belongs to several Arborist organizations.

I do think it's probably the County Extension Office's job to take action on an infestation of an invasive non-native weed like that, but I agree that the city's arborist should at least take the time to learn what it is since it does affect the understory and could be devastating to the environment she claims to care so much about.
 
1) I agree 100% that a healthy understory is very important to the long-term health of the canopy trees. And that invasive species such as stilt grass impede the health of the understory.
2) That is almost entirely lacking in almost every urban landscape.

I don't know that stiltgrass is worse for city trees than bluegrass, fescue, rye, etc???? I'm willing to bet it is better than landscape fabric over the roots.

Her saying "grass is not my area" may not indicate her lack of caring about the invasive species...just realizing her scope of influence? (trying to give the benefit of the doubt here!)
 
It is pretty widespread here in NE GA. but doesn't seem to be negatively affecting the environment all that much. Privet is another story.
 
Microstegium (stiltgrass) SEVERELY affects the environment for native groundcovers, ferns, etc. and nonnative hostas for that matter.
It's certainly within a city arborist's bailiwick; more so if the city planted it on your property. We can add costs of controlling that to the tree damage claim. ;)
Vinca minor (periwinkle) is a less invasive exotic; it gets established where it is not welcomed. How is it doing on the slope?
 
Hey! I got sidetracked yesterday & most of today, but getting ready to call Guy. I appreciate SO much what you say about the stiltgrass, ATH & Guy! When I first read up on it, I was appalled how devastating it can be. And am surprised to hear that about it in NE Georgia, TreeCo. I didn't know it could be widespread w/o much negative effect.
 
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