[NAFEX] black walnuts and pawpaws
Thomas Olenio
tolenio at sentex.net
Mon Dec 17 07:10:53 EST 2007
Lucky,
Are you saying that pawpaws are not affected by juglone?
Juglone is an aromatic organic compound with the molecular formula C10H6O3.
Juglone is found naturally in the leaves, roots and bark of plants in the
Juglandaceae family, particularly the black walnut. Juglone is an
allelopathic compound, meaning it is synthesized by one type of plant and
affects the growth of another. In the case of juglone, it is toxic or
growth-stunting to many types of plants. Landscapers have long known that
gardening underneath or near black walnut trees can be difficult. Juglone
exerts its affect by inhibiting certain enzymes needed for metabolic
function. It is occasionally used as an herbicide.
Just curious if pawpaws are immune.
Tom
-----Original Message-----
From: nafex-bounces at lists.ibiblio.org
[mailto:nafex-bounces at lists.ibiblio.org] On Behalf Of
Lucky.PIttman at murraystate.edu
Sent: Sunday, December 16, 2007 11:43 PM
To: nafex at lists.ibiblio.org
Subject: Re: [NAFEX] black walnuts and pawpaws
Your pawpaws should be fine. In their natural
habitat, they're understory trees, very frequently
growing in the shade & root zone of large black
walnut trees along creeks and in watercourses through
upland forests.
------- Original Message -------
>From : Diane Porter[mailto:dporter at lisco.com]
Sent : 12/16/2007 12:26:09 PM
To : nafex at lists.ibiblio.org
Cc : dporter at lisco.com
Subject : RE: [NAFEX] black walnuts and pawpaws
In October I planted two seedling pawpaws in a
sheltered but sunny
location down near the creek. There are many young
black walnut trees
in the area. The two pawpaws are in a clearing, but
we did cut down a
couple of small black walnuts to make room for them.
Will they be OK in the vicinity of the walnuts? I'm
wondering whether
I should plant a grafted pawpaw near them in the
spring. I wouldn't
want to lose my investment in the grafted tree if the
walnuts are
going to make it impossible for the trees to thrive.
thanks,
Diane Porter
dporter at birdwatching.com
Birdwatching Dot Com
http://www.birdwatching.com
Birdwatching is your lifetime ticket to the theater
of nature.
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