Am continuing this from part 1 now that some of us are beginning to find infected plants in our gardens.
Largosmom started part 1 with these words
Quoting:Hi all, this thread is to help others learn to identify HVX on their hostas. Please post your photos of "known" infected hostas...or at least "likely" hostas. In order to keep this thread focused, please post your pic of a hosta needing HVX identification in a new thread...it will get immediate attention that way. I hope this is OK as we have info scattered about. I have a few photos of hostas obviously infected, and some likely ones that I can share. Apologies on the clarity of some of the photos. I took many with a new camera phone. Warning on my photos, I use Paint Shop Pro to color correct and enhance my photos. It is needed due to the lack of control or lighting at the nurseries where I took many of my photos. It is possible that this process may enhance some aspects of the leaves so that you can tell if the hosta may have HVX, or it may make a "possible" look infected when it may not be. Hopefully Chris or the "real" experts will post if they see something that needs correction. I've also done my best to get the variety of the hosta correct, but in many cases am depending on the tag, which I take of a photo of prior to photographing the rest of the hosta...sometimes the glare washes out the name. Again, corrections are invited.
The picture above and the next couple are from my infected Mountain Snow. It only unfurled in the last two days and Chris from Hallson' s said, "Yes, that is Hosta Virus X. The lighter color is right along and radiating out from the veins.
My 'Stained Glass' and 'Guacamole' looked terrible early this year, they both frost heaved. They are also both from the same garden center, planted at the same time last summer. New leaves grew out on Guac and it looking a lot better, but I have some serious concerns about SG.
ic_conifers - please post pictures of them on a separate thread here on DG and also on Hallson's HVX forum and if they are confirmed as infected, then post them on this thread as well. The Hallson forum is at: http://www.perennialnursery.com/forums/viewforum.php?f=63 You have to sign up to post, but it's free and Chris is likely the best expert on HVX in the business.
I haven't had HVX on any of mine yet. I hope it never happens, I guess I'm just lucky. early on I bought some from the box stores. but then I saw what could happen and stopped buying from them and have limited my buying to one catalog nursery. Jim
Oh yes ... for sure Tee! I am glad its not in your yard.
Jim thats a really good Idea, buy all your stuff from one nursery! I use the same cuation with my growers. I dont use but three and one of them do all the TCs around, so I find them above reproach.If something special come up that I cant live without, I would go to Jim's in Dubuque, if he dont have it ... nobody does.
I can't buy all my stuff from one nursery, I like too many different things : ) There really is no one nursery that has all the hostas that I have in my yard. There are hosta breeders within two hours of my house that have 4,000+ cultivars, but they don't have in-stock everything that I want.
ic_conifers, I'm wondering how many really would pass the 10 foot rule? I try to stick to that. there are soo many look alikes that are registered now days. I even find it hard to cull out simular ones of my hybrids. I keep saying, well, maybe I should give it another year. then another. I have over 20 Skylight X Empress Wu crosses. only 3 are impressive. I hope I don't have that problem if I ever have a plant with HVX. a very good friend of mine had a gold standard with the virus, and wouldn't dig it up. I told her that if she got rid of it, I would give her a new one. so she did, Jim
It was rather cold and wet when the hostas were emerging this year; one week in particular we had close to 5" of rain, which I think contributed to some of them looking a bit distorted.
Anyway, I tested five hostas this spring with the Agdia strips. Two hostas tested positive for HVX, Blue Umbrellas and Earth Angel. The nursery where I purchased Earth Angel just last year took took the situation very seriously. The owner even asked me to bring her some test strips to test a few, which we did. Samples from both her suppliers (reputable tissue culture labs) checked out clean. We narrowed it down to possible cross contamination in her greenhouse, so she is ordering lots of strips and going to do batch testing on her stock.
Here is 'Earth Angel' showing the the collapsed tissue.
Sandy, was Blue Umbrellas new last year, too? I'm trying to get a sense of how soon, on average, a plant will exhibit symptoms assuming it is infected when you bought it. So far I've had two cases that showed signs at the start of their third season in my garden. Really sorry about your latest ones.
If you look at her first two pics, you can see the areas of collapsed tissue. With both my cases of HVX on Halcyon and Wolverine, they had the collapsed tissue, but none of the trademark blotchiness or ink bleed effect.
I think Chris at Hallson's mentioned in one of his posts on the HVX part of his forum that a plant had to be infected for quite a while to display the collapsed tissue...so maybe it is an advanced symptom and the ink bleed earlier? I imagine different cultivars just display the virus differently, as well.
I remember your Looking Glass, Ann...that sure was a weird looking case of it.
I'll see if I can find that post on Hallsons..maybe I remembered it wrong.
Not sure what this hosta it - it's in the garden at St. Andrew's Presbyterian Church in Ottawa, ON. There was an infected plant near it a couple of years ago. So, while I was waiting in line for a concert a couple of days ago, I took a look. And I took a leaf home and tested it, since I have some test strips and had never actually tested a known positive before. It's a medium-large mound of chartreuse foliage.
The only important things on the test strip are the two red lines. The one on the right is a test line. If it's not there, the test cannot be called valid. The one on the left is the indication of positive for HVX. If no HVX, you'll only get the test line.