[MAIPC] FW: Stilt grass question

[Richard Johnstone]

In a study we performed on a new clearing through a forest in Delaware for
an electric transmission line 20 years ago, we noticed a lack of
germinating plants under holly trees which were selectively retained along
the rights-of-way edge. We suspected allelopathic chemicals being leached
into the soil from holly leaf litter or some other means of transport.  Our
study did not have the financing to confirm this suspicion, but my study
partner Michael Robin Haggie of Chesapeake Wildlife Heritage, provided this
information on literature search:  Check out Elroy Rice’s text
“Allelopathy” p. 80. I only have the 2nd edition (1984) = most updated
edition? He cites Peterson’s research on the allelopathic effects of *Kalmia
angustifolia *on* Picea mariana*:

ref:
http://www.ingentaconnect.com/content/saf/fs/1965/00000011/00000004/art00022
but
he does not mention *Ilex opaca.* However if you read Rice’s book any intra
and inter specific phyto-chemical warfare, both above and below
underground, maybe possible! Elroy Rice also wrote “Biological Control of
Weeds and Plant Diseases” Oklahoma Press/Norman 1995, with which you are no
doubt acquainted. Plus “Pest Control with Nature’s Chemicals” Oklahoma
Press/Norman 1983.


PS- Haggie would like to be included in the listserve and his email address
is included.

Rick

On Mon, Sep 28, 2015 at 6:27 AM, Marc Imlay <ialm at erols.com> wrote:

> *Any response for Tom and Jan?*
>
> *Marc Imlay, PhD, **Chair, Biological control working Group *
>
> *Conservation biologist, Park Ranger Office, Non-native Invasive Plant
> Control coordinator.*
> *(301) 442-5657 <%28301%29%20442-5657> cell  *ialm at erols.com
>
>
> *Natural and Historical Resources DivisionThe  Maryland-National
> Capital   Park  and Planning Commission**www.pgparks.com
> <http://www.pgparks.com/>*
>
>
>
>
>
>
>
> -----Original Message-----
> From: tomnjan2 [mailto:tomnjan2 at comcast.net]
> Sent: Monday, September 28, 2015 12:16 AM
> To: Marc Imlay <ialm at erols.com>
> Subject: Stilt grass question
>
>
>
> Hi Marc,
>
> Tom (Crone) and I were walking around the back end of Greenbelt Park
> today. He was checking on some multiflora rose he'd cut earlier as well
> stilt grass he cut. But I noticed something I hadn't before. There were
> large swathes of stilt grass that had bare patches within those areas. The
> common denominator was Holly tree leaf shed. We started searching elsewhere
> and found the same correlation. The stilt grass totally avoided wherever
> the dropped holly leaves landed. Have you seen this before, or know if
> there's a specific chemical in the leaf that inhibits or kills the grass?
> Or some other symbiotic relationship creating the inhibition? I'm really
> curious to know. As we were driving out of the park, I started looking at
> the mountain laurel and what I saw didn't seem to be surrounded by stilt
> grass either.
>
>
>
> thanks
>
> Jan Steiner
>
>
>
> Sent from my iPad=
>
>
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