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<p class="MsoNormal"><span class="DefaultFontHxMailStyle">My TLDR summary here is – it probably won’t do much, but can you risk it?<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">Longer thoughts…<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">I’ve worked in sites where Ailanthus wilt has decimated the trees, and when those sites already had co-occurring native vegetation, that native vegetation did just fine after a lot of dead Ailanthus
decomposed into the ground below. It’s worth noting that many TOH sites actually are already disturbed and degraded in various ways so TOH allelochemicals might be the least of the legacy effects present in an area of (current or former) infestation.<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">Historically most studies on allelopathy tend to over-exaggerate the effects of the allelochemicals due to challenges in creating proper controls and other issues (I co-authored a short non-technical
piece on this available here: <a href="https://www.researchgate.net/publication/236176832_Cracking_the_Walnut_Case">
https://www.researchgate.net/publication/236176832_Cracking_the_Walnut_Case</a>)<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">Another issue with these studies is that they tend to underestimate the rate at which these allelochemicals degrade in most systems. All the more likely with TOH which degrades so quickly it’s like Thanos
snaps his finger and turns them to dust when they die.<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">Personally I would love to use a pile of Ailanthus mulch in an experiment, if I happened to have it just lying around and didn’t know what else to do with it. Of course, if whatever you’re planning on
mulching is very important to you, you probably won’t want to run the risk of figuring out what the exact effects will be. You could consider using it as pathway material or something less directly interacting with your garden.<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle">Norris<o:p></o:p></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
<p style="margin:0in;background:white"><span style="font-size:10.5pt;font-family:Raleway;color:black;border:none windowtext 1.0pt;padding:0in">—</span><span style="font-size:10.5pt;font-family:Raleway;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:optima;color:#82764B">Norris Z. Muth, Ph.D. (he/him)</span><span style="font-family:optima;color:#1F497D"><br>
</span><span style="font-family:optima;color:#40577F">Juniata College</span><span style="font-family:"Arial",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:#1F497D"><a href="https://juniata.zoom.us/my/muthlab"><span style="font-family:optima;color:#40577F">Zoom meeting</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:optima;color:#3F557D"><a href="http://muthlab.org/">muthlab.org</a></span><span style="font-family:"Arial",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><o:p> </o:p></span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> MAIPC <maipc-bounces@lists.maipc.org> on behalf of Jackson, David Robert <drj11@psu.edu><br>
<b>Sent:</b> Monday, February 7, 2022 11:17:20 AM<br>
<b>To:</b> MAIPC Listserve <maipc@lists.maipc.org><br>
<b>Subject:</b> [MAIPC] Use of Tree of Heaven Mulch</font>
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<p class="x_MsoNormal"><span style="font-size:12.0pt">See question below. Does anyone have any information or knowledge on this subject? Thanks.</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#16325C; background:white">Ailanthus mulch</span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#16325C; background:white">I had nine 30-40’ ailanthus trees cut down and mulched. I did not realize at the time that it is allelopathic. I am trying to re-grow a native
Virginia garden. Should I age this massive amount of mulch, or get rid of it? How long does its allelopathy last? Weeks? Months? Years?</span><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#16325C"><br>
<span style="background:white">Thank you so much for your kind consideration.</span></span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#16325C; background:white">Robin Allman</span></p>
<p class="x_MsoNormal"><a href="mailto:robinallman54@gmail.com"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#015BA7; background:white">robinallman54@gmail.com</span></a></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#16325C; background:white">(804) 714-5874</span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt"> </span></p>
<p class="x_MsoNormal"><span style="font-size:14.0pt; font-family:"Arial",sans-serif; color:#1F3864">Dave</span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#323E4F"> </span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#323E4F">David R. Jackson</span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#323E4F">Forest Resources Educator</span></p>
<p class="x_MsoNormal"><b><span style="font-size:10.0pt; font-family:"Arial Black",sans-serif; color:#323E4F">Penn State Extension-Centre County</span></b></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#323E4F">Willowbank Building, Room 322, 420 Holmes Street</span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif; color:#323E4F">Bellefonte, PA 16823</span></p>
<p class="x_MsoNormal"><span style="font-size:9.0pt; font-family:"Arial",sans-serif"><a href="mailto:drj11@psu.edu"><span style="color:#0563C1">drj11@psu.edu</span></a> 814-355-4897(office)</span></p>
<p class="x_MsoNormal">Forests and Wildlife Extension: <a href="https://extension.psu.edu/forests-and-wildlife">
<span style="color:#0563C1">https://extension.psu.edu/forests-and-wildlife</span></a>
</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"><b>“Anything we can’t do forever is by definition unsustainable.”</b></p>
<p class="x_MsoNormal"><b><span style="font-family:"Blackadder ITC"">Sir David Attenborough</span></b><span style="font-family:"Blackadder ITC""></span></p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"> </p>
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