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  Re: [Aroid-l] Arisaema disease
From: Steve Marak <samarak at gizmoworks.com> on 2017.07.30 at 15:46:20

I've experienced exactly what you describe here in NW Arkansas.

None of the Asian species I've tried outdoors here, including sikokianum, candidissimum, ringens, fargesii, and others, last more than about 5 years outdoors. They look good for a couple of years, less good for a couple more, then just don't appear one spring. The few I have now I keep in pots in the greenhouse, where they do fine if I store them in the coldest corner over the winter.

We do have the arisaema rust here in native populations, and we do grow the native species in the yard, but some of the Asian species declined and disappeared without ever showing the characteristic orange pustules you mention.


On 7/30/2017 3:27 PM, avukich@aol.com wrote:
Just wondering if anyone can shed some light on the possible truth that the native species of Jack and the pulpit can spread disease to the more exotic members of the genus?
I used to have multiple┬┤groups of A. sikokianum grown from seed and a clump of A. ringens that was over 3 foot tall.
One spring the ringens just didn't reappear and the few ratty sikokianums that appeared had orange pustules on their foliage. No problem with the native triphyllum 10 feet away in some cases.
There are voles in the garden but the triphyllum comes up fine...just wondering if anyone can shed some light on this...zone 6A garden in mid state CT..


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