[MAIPC] Garlic mustard disposal

[Mark Frey]

All

Many years ago I did some work on assessing if removal was necessary - it
is summarized in the attached. I learned that plants produced seeds even if
they had no seed pods when pulled. And, they even produced seeds when I
pulled off the inflorescences or roots.

As I recommended back then I still recommend the use of a sacrifice area.
If the target area is so large that you can't pull it all in a given
year then just pile the pulled plants in the adjacent infested area. That
results in time saved in the bagging and hauling and doesn't actually
increase the total number of plant formed in the still infested area. There
is no increase because there is a lot of density-dependent mortality that
occurs. It is notable that I have seen one site where pulled plants have
been left on the ground and no seedlings have formed. That was a few years
ago in Maryland. I still wouldn't risk it though!

Mark

On Thu, Apr 15, 2021 at 3:03 PM Mike Van Clef <mike.vanclef at gmail.com>
wrote:

> Similar idea avoiding trash bags is to remove the seed/flower heads from
> the pulled plant to assure that immature seeds cannot ripen.  Usually only
> in shady or damp conditions, nearly ripe seeds can ripen from a
> pulled plant. If too far along, then just bag the seed heads.
>
> -Mike
>
> Michael Van Clef, Ph.D.
> Stewardship Director, Friends of Hopewell Valley Open Space
> Program Director, New Jersey Invasive Species Strike Team
> Principal, Ecological Solutions, LLC
>
> Office: 609-730-1560
> Mobile: 908-528-6674
>
>
> On Thu, Apr 15, 2021 at 1:27 PM Stephen Hiltner <stevehiltner at gmail.com>
> wrote:
>
>> One idea, in order to avoid lots of bulky heavy bags of garlic mustard
>> that must be hauled away and tossed in the trash, is to have all volunteers
>> make one big pile of the pulled plants, preferably in a spot where the
>> seeds won't be washed into new locations. That way, if any seeds do mature,
>> they will be concentrated in one location, which will make subsequent
>> workdays easier. Not ideal, but better than generating loads of trash.
>>
>> On Thu, Apr 15, 2021 at 12:31 PM Marc Imlay <ialm at erols.com> wrote:
>>
>>> Over a decade ago it was found that garlic mustard is one of the few
>>> invasive plants that will regrow if left in a pile.
>>>
>>>
>>>
>>> Marc
>>>
>>>
>>>
>>> *From:* MAIPC <maipc-bounces at lists.maipc.org> *On Behalf Of *Kenny,
>>> Colleen
>>> *Sent:* Thursday, April 15, 2021 11:44 AM
>>> *To:* MAIPC at lists.maipc.org
>>> *Subject:* [MAIPC] Garlic mustard disposal
>>>
>>>
>>>
>>> Hello everyone,
>>>
>>> Does anyone have experience pulling garlic mustard and piling it on
>>> site? I am having a large volunteer event to pull it, and am limited in how
>>> much we can cart out. I'm hoping if we pile it up it will decompose and not
>>> reroot or spread. Has anyone had a positive or negative experience if not
>>> bagging and removing?
>>>
>>>
>>>
>>> Thanks!
>>>
>>> Colleen
>>>
>>>
>>>
>>> Colleen Kenny
>>>
>>> Natural Resource Manager
>>>
>>> Upper Dublin Township Parks and Recreation Department
>>>
>>> 267-615-3731
>>>
>>>
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