[MAIPC] [EXTERNAL] Re: Basal oil on ailanthus as stump treatment

[Spencer, Sandy]

I hear that works too, as long as not too cold and depending on size of tree.
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From: MAIPC <maipc-bounces at lists.maipc.org> on behalf of Jeffrey Branham <jbranham at prescott.edu>
Sent: Wednesday, August 9, 2023 2:57 PM
To: Conner McBane <cmcbane at appalachiantrail.org>
Cc: MAIPC Listserve <maipc at lists.maipc.org>
Subject: [EXTERNAL] Re: [MAIPC] Basal oil on ailanthus as stump treatment




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What do folks think about winter basal oil treatments?

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On Tue, Aug 8, 2023 at 10:58 AM Conner McBane <cmcbane at appalachiantrail.org<mailto:cmcbane at appalachiantrail.org>> wrote:
Hey Damien,

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.

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.

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.

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.

Cheers,


Conner McBane

Natural Resource Manager
Appalachian Trail Conservancy
416 Campbell Ave | Suite 101
Roanoke, VA 24016
Phone: 540-427-7098
Cell: 540-525-6812
Fax: 540-904-4368
cmcbane at appalachiantrail.org<mailto:eprice at appalachiantrail.org>
www.appalachiantrail.org<http://www.appalachiantrail.org/>
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From: MAIPC <maipc-bounces at lists.maipc.org<mailto:maipc-bounces at lists.maipc.org>> on behalf of Ossi, Damien (DOEE) <damien.ossi at dc.gov<mailto:damien.ossi at dc.gov>>
Sent: Monday, August 7, 2023 10:48 AM
To: 'MAIPC Listserve' <maipc at lists.maipc.org<mailto:maipc at lists.maipc.org>>
Subject: [MAIPC] Basal oil on ailanthus as stump treatment

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Hi MAIPC members,



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.



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?



Thanks,

Damien





Damien P. Ossi

Wildlife Biologist

Fisheries & Wildlife Division

Department of Energy & Environment

Government of the District of Columbia

1200 First Street NE, 5th Floor

Washington, DC 20002

(202) 741-0840

damien.ossi at dc.gov<mailto:damien.ossi at dc.gov>





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--
Cheers,
  JB
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