Arisaema disease

From: Steve Marak <samarak at gizmoworks.com> on 2017.07.30 at 22:46:20(23791) Anton, 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. Steve HTML +More 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.. Thanks Anton --------------E523CD45595840766072EB3E-- --==============U31013933678929979==

From: "J. Agoston" <agoston.janos123 at gmail.com> on 2017.07.31 at 05:31:53(23794) Dear Steve, For rust you may want to apply tebuconazole (250 mg/ml active ingredient) 1 ml/l of water 10-14 dasys interval, or even bettrer: tebuconazole (160 mg/ml) + triadimenole (40 mg/ml) + spiroxamin (250 mg/ml) 1 ml/l, biweekly. You have to start spraying as soon as the first leaf starts to unfold, and stop when it turns from yellow do brown. To cure an infection you should do the spraying in at least 2 consecutive years, 3 consecitive yers are the best. When spraying also note that it shopuld be a spray or mist like action on the leaf, if droplets roll down from the leaf it may cause burn (phytotoxicity) at the point where it rolles of from the leaf. With Best Regards, Janos HTML +More --001a113f8c9242c20c055596597d-- --==============‰92133648285872517==

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