Donate Now
and become
Forum Supporter.
Many perks! <...more...>
|
11-10-2011, 02:22 AM
|
Senior Member
|
|
Join Date: Nov 2011
Posts: 7,196
|
|
Virused plant?
My Rosy Sunset 'Pacific Satin' displays serious sick symptoms on most of its leaves. I knew it didn't look good but the flowers were so abundant and pretty to look at, plus, strong sweet scent as an added bonus, and it was only 15, so I thought I would get it anyway and get rid of it once the flowers faded. lol
I don't think it is something common, but I found an online store where I can get it very cheap (I saw one flower shop in West Village who sell this for 125!!! I was like, what!!!!!????), so I'm not concerned much about tossing it, but more about other plants I have in the apartment.
I hope the picture shows the light, almost white, streaking along the veins with some brown spots. There are no bugs, so it's not insect, definitely not bacterial or fungus...so, it's virus or chemical burn from spraying(also I think is not likely as it doesn't look typical of burning from spraying).
Any advanced knowledge, please???
Last edited by NYCorchidman; 03-10-2013 at 11:36 PM..
|
11-10-2011, 03:02 AM
|
Senior Member
|
|
Join Date: Apr 2008
Posts: 6,386
|
|
That looks a bit ominous, though again, the only way to be sure its virused is to run a test.
|
11-10-2011, 04:56 AM
|
|
Administrator
|
|
Join Date: Oct 2007
Location: middle of the Netherlands
Posts: 13,777
|
|
That could very well be some sort of fungal infection, some do cause streaks like that. I would suggest treating it for that, and then keeping the plant at least until a new growth develops. If the same thing appears there, then there's an increased likelyhood of it being viral.
Plant viruses are not transmitted the way animal ones are, there needs to be physical contact between the sap of a sick plant and the sap of a healthy plant. So if you sterilize your cutting tools between plants and don't have sucking insect problems, you don't have to throw it away. I have 2 orchids that I am suspicious about, but because they bloom so wonderfully I have segratated them from the others and take the necessary precautionary steps.
__________________
Camille
Completely orchid obsessed and loving every minute of it....
My Orchid Photos
Last edited by camille1585; 11-10-2011 at 05:03 AM..
|
11-10-2011, 08:47 AM
|
Senior Member
|
|
Join Date: Apr 2010
Zone: 6a
Location: Pennsylvania
Posts: 1,474
|
|
That is one I would test for virus.
I agree with Camille that it could be a fungal leaf spot infection.
But you cannot rule out a virus without testing.
|
11-10-2011, 10:51 AM
|
Senior Member
|
|
Join Date: Jul 2008
Zone: 7a
Location: Maryland
Age: 77
Posts: 1,433
|
|
AND testing is THE ONLY WAY to tell if it's virused ! You can send a small piece of your plant to Critter Creek Lab. for about $5 or buy a batch of 25 home tests for about $5 each from AGDIA.
|
11-10-2011, 10:53 AM
|
Senior Member
|
|
Join Date: Mar 2011
Zone: 10b
Location: South Florida
Posts: 1,574
|
|
I agree with all of the above, except I don't think it's fungus. If it were my plant I would assume with confidence that it is viral because of the specific pattern on the leaves (based on my limited personal experience). If it's all over the plant I would toss it because the blotchy leaves would be to me like a sad song playing every time I looked at the plant, but you certainly don't need to if the plant is otherwise thriving. As was previously stated, just use sterile practices and keep the sucker bugs away. Good luck!
|
11-10-2011, 11:29 PM
|
Senior Member
|
|
Join Date: Nov 2011
Posts: 7,196
|
|
Thank you, everyone!
Can you tell me what types of virus the test will pick up? I heard a lot about the names like CMV and ORV, but I recently read that there are over 40 virus that affect orchid plants, which left me totally OMG!!!!
I wonder if that means at least 40 something different symptoms as well. so much headache!
The funny thing about virused plant is some of them grow perfectly fine with no symptoms and only when it flowers, it shows. I tossed one cattleya this summer. It grew so well with nothing ugly on leaves, then when the flowers opened, there were thoses dreaded color breaks. I was so disappointed.
Now this oncidium intergeneric I have grows and flowers like crazy. The flowers do not show any symptoms (they are quite small so even if they did, it wouldn't cause much cosmetic damage), but the leaves are ugly.
Yes, everytime I look at the leaves, I'm not happy. Is touching the leaves with bare hands and then touching other plants with the same hands going to transfer virus?
I'm all paranoid now!
It seems like many of the intergenerics have some issues with leaves. At least that's how I feel. I love to see clean green leaves, but when I see anything at all other than green on it (except for naturally mottled ones), I get all worried.
I will post pictures of some of the other plants leaves I am worried. They might be normal, but then again, I'd like to hear what others have to say.
Thanks again.
|
11-10-2011, 11:32 PM
|
Senior Member
|
|
Join Date: Nov 2011
Posts: 7,196
|
|
I don't think I've heard of fungal infection where streaks are present as a result. Is it a certain type of fungus or specific plants reaction to a fungal attack?
I do think it's possible that the tiny brown spots could be the result of fungal activity, but I think it's mostly virus and the brown spots might be just the cell death spots.
|
11-11-2011, 01:28 AM
|
Senior Member
|
|
Join Date: Jul 2008
Posts: 1,467
|
|
Quote:
Originally Posted by NYCorchidman
I don't think I've heard of fungal infection where streaks are present as a result. Is it a certain type of fungus or specific plants reaction to a fungal attack?
I do think it's possible that the tiny brown spots could be the result of fungal activity, but I think it's mostly virus and the brown spots might be just the cell death spots.
|
NYCorchidman - I know you said that there were no bugs on the plant but what you show in your picture sure looks to me to be chlorotic areascaused by sucking insects. It doesn't look like any virus that I have ever seen.
|
11-11-2011, 03:53 AM
|
|
Administrator
|
|
Join Date: Oct 2007
Location: middle of the Netherlands
Posts: 13,777
|
|
Yes there are many viruses, but the tests generally pick up CymMV (CMV is something different: cucumber mosaic virus) and ORSV, because those are generally the 2 most prevalent viruses.
To make things tougher, not all symptomatic plants are viruses and not all infects plants show symptoms. Most mass propagated Phals are believed to be infected for instance. So if virus worries you, test your entire collection. And I bet that you will be very surprised by the results. For most people virus isn't too much of an issue, unless they have a collection of very expensive orchids, or are collecting divisions of old heirloom Catts for instance.
For your fungus question, my knowledge in in 'normal' plants (they don't teach orchids in college!) and streak creating fungi are very common, especially among the monocots (think grasses). Orchids are monocots, so it's fair enough to assume that they could get similar things.
As for Glen's suggestion, I hadn't thought of it, but it's definitely something to consider. Are you sure that the plant doesn't have a mite infestation? Symptoms are similar to that.
As for Onc leaves being ugly, that's sometimes their nature. They can be prone to spotting and such if you mist them, or if they are in high humidity with low air movement.
__________________
Camille
Completely orchid obsessed and loving every minute of it....
My Orchid Photos
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -4. The time now is 01:55 AM.
|