[MAIPC] Basal oil on ailanthus as stump treatment

[Elizabeth Mizell]

If the timing works, you might consider this strategy recommended by Penn
State Extension:

*If cutting tree-of-heaven for immediate safety reasons, do so and treat
the stump. However, cut stump herbicide applications are not recommended
because they do not provide effective control of roots. Stump treatments
will keep the stump free of sprouts, but they will not prevent root
suckering. When tree removal is necessary, it is best to treat with one of
the above-mentioned herbicide applications first, wait for symptoms to
develop (generally 30 days), and then cut.*

https://extension.psu.edu/tree-of-heaven

_______________________________________
Elizabeth Anne Mizell
Executive Director | Blue Ridge PRISM
beth at blueridgeprism.org


Blue Ridge PRISM <https://blueridgeprism.org/> is a partnership for
regional invasive species management in Virginia.




On Mon, Aug 7, 2023 at 10:50 AM Ossi, Damien (DOEE) <damien.ossi at dc.gov>
wrote:

> 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
>
>
>
>
> _______________________________________________
> MAIPC mailing list
> MAIPC at lists.maipc.org
> http://lists.maipc.org/listinfo.cgi/maipc-maipc.org
>
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