I was excited to see new spring growth on my Miyazaki Tricyrtis; however, it wasn't long till I noticed black spotting on them. Is this indicative of a virus or disease? Any suggestions on possible causes/treatment? Thank you.
When I came across this article last fall, I was concerned that my plant may be infected as the flowers were mottled very much like the one photo in the article. However, at that time, the leaves did not have black spots on them...those appeared this spring. Not sure if it's one and the same issue, but I've a hunch that I should just pull the plant up and destroy it as I don't want it to infect the 'Blue Wonder.' The two plants are less than 10 feet away from each other.
I notice the same spots on my foliage. But as it has grown, the spots have faded somewhat. Yesterday was the first time I'd heard of the virus and I've got an order of Raspberry Mousse on the way. Guess that was money thrown away!
plantmover, miatablu gave me the link to this thread to see if I could shed any light on your problem. As Chris indicated, some of the Tricyrtis do have spots on their foliage, more of a mottling, but Miyazaki is usually not one of them. I have heard of the virus problem with Tricyrtis, but it hasn't concerned me since it seems that it's more of a problem with flower color not being true than something that will actually kill the plant. The flowers are so pretty I really don't care what color they are, although I guess I would be disappointed if I was expecting yellow and got something different :) Can you take any pictures of the black spots? That might help identify what the problem could be. I'll be gone until the first of the week, but I'll check back...when I get a chance I'm going to have to check the Tricyrtis in our gardens and see if there are any problems! LOL
Thank you, Debbie! I agree, the flowers are pretty, mottling and all. I'm gonna feel pretty silly if those spots are supposed to be there. Now I'm also questioning if I've confused the 'Miyazaki' with the 'Blue Wonder'. At any rate, neither had black spots on them when I planted them last fall.
I checked the underside of the leaves but for the most part, the spots mostly appear on the top side. A couple of the more mature leaves at the base had some spottiness on the underside but not as distinct, as if the spots were spreading and fading out.
I sent a D-mail to henryr10...and here's his response (he ok'd posting it):
April 30, 2008
I love shooting toads.
The hirtas all have some spots.
More some years than others.
It could be the weather or nutrients.
I wouldn't worry about them as it's not diseased.
Watch for mutations on the 'Miyazaki' they like to sport a lot.
I'm getting bi-colored blooms on some now... well last Fall... lol!