capsicum chlorosis virus

[Stray59]

Wow James -
The ringspot is fast acting. I am so sorry to see your phalae's in such condition. I am also glad you shared this with us - it is just one more thing to be on the look out for in our collections.
Thanks for sharing your grief -
Steve

[Brooke]

Are you sure it isn't cell collapse from the cold weather in SoCal? If your g/h isn't heated Phals will show their displeasure in this same manner.

Brooke

[james mickelso]

The cell collapse wouldn't be in such nice circles. And they wouldn't start out small and then rapidly enlarge and still be in a nice circular pattern. I wish it were so but I've had frost damage on my orchids before and this isn't this. Darn it!!!

[katrina]

James -- Do you mind sharing the name of the lab (a link would be even better) you sent samples of the plants to? Also, how long does it take to get the results?

I have a couple of plants I've been considering having tested but want a more thorough testing than the strips allow. They are large plants and won't be easily (or inexpensively) replaced so I don't want to just pitch them.

Also...if you aren't seeing any thrips or other insects...to what do you attribute the virus jumping from plant to plant so easily/quickly? I ask because I thought virus could only be transferred via insects or poor hygiene (dirty pots, dirty tools, etc).

Thanks so much for any info you can give.

[camille1585]

With that high speed of spreading/infection, it sounds and looks more like it's bacterial than viral. And bacterial infection can lead to circular marks like that. Even a fast spreading virus does not spread that fast, and it wouldn't be able to jump from plant to plant so quickly unless you have a major thrips or handling problem. I also found information on the Naktuinbouw website (Dutch Horticulture Inspection service) that in Phals, CaCV is considered a localised virus rather than systemic one. Your issues are clearly systemic.

[james mickelso]

Take a look at SpringerImages and you will see what I found on my phals. I read quite a bit about the different capsicum viruses and that is what my phals have gotten. I don't have a thrip problem or any other insect problem. The phals could have been infected and the cold weather could have diminshed their resistance to the virus. I found no other bacterial or fungal damage that looked anything like what they had and I looked all over the place. I didn't send any samples to a lab. All of my orchids are rescues or bought from the donation tables at the various club events. These phals all came from a batch of HD orchids that festooned the tables aT MY NEICES wedding. They are expendable. As they die they will be thrown out. If I still had the 400+ orchids that I had last summer the phals would have been tosed already.

[Orchidreamer]

Originally Posted by camille1585

With that high speed of spreading/infection, it sounds and looks more like it's bacterial than viral. And bacterial infection can lead to circular marks like that. Even a fast spreading virus does not spread that fast, and it wouldn't be able to jump from plant to plant so quickly unless you have a major thrips or handling problem. I also found information on the Naktuinbouw website (Dutch Horticulture Inspection service) that in Phals, CaCV is considered a localised virus rather than systemic one. Your issues are clearly systemic.

That's what I'm thinking too, because according to the website, CaCV shows symptoms as concentric yellow rings, which looked different from the photos attached.

Here's a picture of erwinia, a bacterial infection which can grow in a circular fashion:

http://www.academicjournals.org/ajb/...%20et%2019.jpg

http://www.orchidando.net/images/mal...carotovora.jpg

Sometimes the shape is round, sometimes it's irregular. It just depends on how the bacteria (or fungus) grows.

And I've seen the exact same symptoms before. It's best not to let water collect on the leaves and you may need to cut off the affected portions if they keep growing in size.

[camille1585]

Your link just goes to the homepage of SpringerImages. Tell me what to search for there.
Still, without testing, you are way to quick that it's virus, and that specific virus. I do not see the characteristic ring pattern on your plants. Yours have necrotic circular lesions, with some ringing apparent from the spread of the disease. And like I said, virus simply does not spread and kill off a plant that quickly.

I'm not saying all this to try to get you to save them. If they're expendable for you, that's fine. I'm just saying that you're looking in the wrong place as far as the cause.

[katrina]

Originally Posted by james mickelso

Take a look at SpringerImages and you will see what I found on my phals. I read quite a bit about the different capsicum viruses and that is what my phals have gotten.

So...are you saying you haven't had the plant tested? It sounded like you had sent them off to a lab.

I'm not sure if you know this but the only true diagnosis of a virus is via testing.

I have seen plants that looked like they had a virus but they tested clean and plants that looked clean as a whistle and they tested positive. You absolutely must test to be sure.

[james mickelso]

Hi Camille, here is the link (I hope) where the pics for the CaCv are located. SpringerImages - Phalaenopsis orchid infected with Capsicum chlorosis virus-Phalaenopsis (CaCV-Ph). Phalaenopsis leaf showing large chlorotic spots with centric necrosis (a) and large chlorotic ringspot (b) and Phalaenopsis seedlings inoculated with . I hope that's correct. Not computer literate so that's the best I could do. The initial rings started small and grew rapidly with no lesions at all.



The pics I sent were what the leaves looked like after being out by the trash bin for quite awhile. That is why they had the color. I had an orchid long ago that had a bacterial infection and I think the old grower at the SD club said it was irwinia. I'll look in that direction. Maybe that is it. Thanks for the help.