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All the literature I have seen indicates that is the best method. <br>
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<div>Ray</div>
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<blockquote type="cite">On Aug 9, 2023, at 3:02 PM, Jeffrey Branham <jbranham@prescott.edu> wrote:<br>
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<div dir="ltr">What do folks think about winter basal oil treatments?</div>
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<div dir="ltr" class="gmail_attr">On Tue, Aug 8, 2023 at 10:58 AM Conner McBane <<a href="mailto:cmcbane@appalachiantrail.org">cmcbane@appalachiantrail.org</a>> wrote:<br>
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Hey Damien, </div>
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We use Garlon 4 and basal oil on ailanthus a lot in Southwest and Central Virginia with great results. I have used both glyphosate and triclopyr on ailanthus and I've found anecdotally that triclopyr always works best for this species. </div>
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We use 20% triclopyr and 80% basal oil mix and we have leaned towards hack and squirt and basal bark. I have had good success with basal bark on ailanthus, but you use more chemical and some non-target treatment will happen depending on proximity. With that
said, we use the same mix for autumn olive and bush honeysuckle as a basal bark for anything too large to foliar and it works really well for that application too. Basal bark treatment should wait at least 30 days before cutting. I do not recommend cut-stump
treatment for ailanthus because you don't have enough translocation to the entire root system and a lot of suckers are likely. If you HAVE to do a cut-stump treatment and they are large DBH I would treat the cut surface and buttress roots/stem. You will probably
have some resprouts, but you can try to foliar those as they come up. </div>
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Once you treat standing ailanthus, the stems are likely to drop within 2 years' time so just be aware of that additional hazard if you go that route in the future. You can also buy some PathFinder II which is basal oil/triclopyr RTU herbicide at 20% and it
saves the hassle of mixing, but it is a little bit more expensive. </div>
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Let me know if you have any other questions and I'm happy to help! I also have a contractor who can help out up there, they are located in Charlottesville, but willing to travel. </div>
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Cheers,</div>
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<span style="font-size:10pt;font-family:Arial,Helvetica,sans-serif;margin:0px">Conner McBane</span></p>
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<div id="m_7518484466528429911divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt;color:rgb(0,0,0)"><b>From:</b> MAIPC <<a href="mailto:maipc-bounces@lists.maipc.org" target="_blank">maipc-bounces@lists.maipc.org</a>> on behalf of
Ossi, Damien (DOEE) <<a href="mailto:damien.ossi@dc.gov" target="_blank">damien.ossi@dc.gov</a>><br>
<b>Sent:</b> Monday, August 7, 2023 10:48 AM<br>
<b>To:</b> 'MAIPC Listserve' <<a href="mailto:maipc@lists.maipc.org" target="_blank">maipc@lists.maipc.org</a>><br>
<b>Subject:</b> [MAIPC] Basal oil on ailanthus as stump treatment</font>
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<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Hi MAIPC members,</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Does anyone use oil-based triclopyr rather than water-based on ailanthus as a stump-cut treatment? We’re looking to remove a large number of ailanthus in DC before the spotted lanternflies
arrive in force, and the vendor is proposing to do a stump-cut treatment with triclopyr. I want to recommend that they use Garlon-4 or equivalent rather than Garlon-3a or equivalent, because the herbicide can be applied to both the sapwood on the stump and
the bark on base of the stump. But I also saw a study from Italy that indicated that glyphosate is better for stump-cut treatment of ailanthus.</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">The trees must be removed at the time of treatment, so using hack-and-squirt or typical basal bark treatments won’t fly. Any advice from the membership?</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Thanks,</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Damien </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><b>Damien P. Ossi</b></p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Wildlife Biologist</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Fisheries & Wildlife Division</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Department of Energy & Environment</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Government of the District of Columbia</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">1200 First Street NE, 5th Floor</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">Washington, DC 20002</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif">(202) 741-0840</p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><a href="mailto:damien.ossi@dc.gov" id="m_7518484466528429911OWAb5db83bf-8ae2-9868-0f53-264845dd3774" target="_blank"><span style="color:blue">damien.ossi@dc.gov</span></a></p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<p style="margin:0in;font-size:11pt;font-family:Calibri,sans-serif"> </p>
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<div dir="ltr">Cheers,<br>
JB</div>
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