[MAIPC] Italian Arum

[Randall, Johnny]

Ruth: Jil is unfortunately correct! We haven’t found a herbicide treatment that works very well.

I recommend building a screening frame with the proper hardware cloth dimension for trapping tubers, but allowing soil to sift through. (I’m building some of these now for Ficaria verna diggings….) The only thing you’re putting in the trash is vegetation and not heavy soil.

Johnny

From: MAIPC <maipc-bounces at lists.maipc.org> On Behalf Of Jil Swearingen
Sent: Monday, March 1, 2021 8:43 AM
To: Ruth Douglas <cvilleruth at gmail.com>
Cc: MAIPC Listserve <MAIPC at lists.maipc.org>
Subject: Re: [MAIPC] Italian Arum

Ruth,

That plant is a monster. Italian arum is or was at the national arboretum (that's where I first got to know it about a decade ago). It's very hard to get rid of. It's best to dig plants up - you have to get ALL the underground tubers and bag and dispose of the material in a landfill. You could leave it in the bags for a while to let it rot before disposal. It would be best to remove most of the soil in the area where the plants are, if that's a possibility. That would help ensure removal of all tubers.

Here's a good fact sheet from the State of Washington.
https://www.nwcb.wa.gov/weeds/italian-arum

Thanks,

Jil


On Mon, Mar 1, 2021 at 8:33 AM Ruth Douglas <cvilleruth at gmail.com<mailto:cvilleruth at gmail.com>> wrote:
Help! A well-meaning person or persons planted Italian arum (Arum italicum) an unknown number of years ago at my church, and it's been spreading. I've seen the Maryland info on this plant (http://mdinvasives.org/iotm/nov-2015/) and  it's discouraging about how to get rid of it.

However, no mention is made of tarping or laying black plastic on areas where it is spreading. Has anyone tried this, and if so, with what success? I know its underground structures can be fairly deep, but does that preclude use of this technique?

Any advice is welcome.

Thanks.

Ruth Douglas
Charlottesville, VA
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