[MAIPC] Basal oil on ailanthus as stump treatment

[Ossi, Damien (DOEE)]

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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