Orchids forum: Pest or Disease?

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Name: Tony Briceno
Tracy, ca (Zone 9b)
Image
Matorchid
Feb 7, 2015 7:58 PM CST
Hello everyone,
Okay since the last time I posted about my mite problem that I had. A new problem has arisen.
I got these chlorotic blotches that are appearing on some of my plants my Oncidiums and Ondontoglossums. Mind you not all plants have this blotching, but recently I picked up a new Cymbidium and these have appeared over the last few days at my house. The reason why I say at my house is I do not keep the Cymbidium with the rest of my collection, this guy is kept outside unless it is freezing. So I'm just trying to figure out if this is actually a pest or disease. At first I was thinking it was scale but after many treatments it just does not seem to go away. I've tried all the usual methods rubbing alcohol wiping down the leaves cotton swab and some natural pesticides you know, Neem, clove oil, the Dr. Bronner's insecticidal soap method and i'm not sure now what to do.
I will go ahead and post some pics and maybe I can get to feel from the replies of what it might be.
Please feel free to chime in on any info that you can give me. And all responses are greatly appreciated.
This is the plant in question

Thumb of 2015-02-08/Matorchid/1ac225
This is the plant at 60 times magnification
Thumb of 2015-02-08/Matorchid/320afa
This is same plant at 100 times magnification
Thumb of 2015-02-08/Matorchid/a1e33a
And This is plant or leaf as you would see it with the naked eye
Thumb of 2015-02-08/Matorchid/8657b8

Name: Jim Hawk
Odessa, Florida (Zone 9b)
Charter ATP Member Hibiscus Birds Bromeliad Greenhouse Master Gardener: Florida
Garden Photography Region: United States of America Roses Tropicals Region: Florida Orchids
Image
hawkarica
Feb 7, 2015 8:49 PM CST
It looks like Phyllosticta Leaf Spot to me but then I can only judge from your pictures. It can occur on Cymbidiums, Oncidiums and Ondontoglossums but is perhaps more serious on Dendrobiums. It is usually not a severe problem but rather cosmetic. Spots may start anywhere on the leaf or pseudobulb as small yellow lesions. As they continue to grow, they become round or oval and are slightly sunken. The black spots in the center are the spores of the fungus. This disease is usually not that serious but if you want to attack it, try a mancozeb fungicide as a foliar spray.

Jim
Name: Ken Ramsey
Starkville, MS (Zone 8a)
[url=www.tropicalplantsandmore.com]
Orchids Greenhouse Vegetable Grower Ferns Region: United States of America Hummingbirder
Composter Bromeliad Master Gardener: Mississippi Cat Lover Tropicals Plumerias
Image
drdawg
Feb 8, 2015 7:25 AM CST
I have seen some of this occur on my large Den. over the years, but really, compared to lots of "blemishes" on my orchids, I never really worried about what I was seeing. I think when it does occur, the older leaves are where I see it. The plant is very healthy, has bloomed every year (now has 8 inflorescence stems), so as Jim pointed out, it may be more cosmetic than anything else.
drdawg (Ken Ramsey) - Tropical Plants & More
[url=www.tropicalplantsandmore.com]www.tropicalplantsandmore.com[/url]
If God wanted me to touch my toes, he would have put them on my knees.
Name: Ursula
Fair Lawn NJ, zone 6b
Charter ATP Member Spiders! Native Plants and Wildflowers Region: Pennsylvania Greenhouse Cactus and Succulents
Forum moderator I was one of the first 300 contributors to the plant database! Photo Contest Winner: 2014 Ponds Lover of wildlife (Black bear badge) Region: New Jersey
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Ursula
Feb 8, 2015 8:13 AM CST

Moderator

Tony,
I have nothing to add to this, but I just came across your thread about watering Orchids, set ups and more , and I will link it here for interest.
The thread "Watering" in Ask a Question forum

I do have a question, can you please share your Camera set up on your Microscope? At least I think that is what I am seeing...
[Last edited by Ursula - Feb 8, 2015 8:17 AM (+)]
Give a thumbs up | Quote | Post #782440 (4)
Name: Jim Hawk
Odessa, Florida (Zone 9b)
Charter ATP Member Hibiscus Birds Bromeliad Greenhouse Master Gardener: Florida
Garden Photography Region: United States of America Roses Tropicals Region: Florida Orchids
Image
hawkarica
Feb 8, 2015 3:38 PM CST
Ursula, I clicked on your link and wound up answering someone else's question. I could keep busy for hours over there. It's just like working the MG Desk at the Extension Service. Sticking tongue out

Jim
Name: Ken Ramsey
Starkville, MS (Zone 8a)
[url=www.tropicalplantsandmore.com]
Orchids Greenhouse Vegetable Grower Ferns Region: United States of America Hummingbirder
Composter Bromeliad Master Gardener: Mississippi Cat Lover Tropicals Plumerias
Image
drdawg
Feb 8, 2015 3:44 PM CST
Rolling on the floor laughing Thumbs up Whistling
drdawg (Ken Ramsey) - Tropical Plants & More
[url=www.tropicalplantsandmore.com]www.tropicalplantsandmore.com[/url]
If God wanted me to touch my toes, he would have put them on my knees.
Name: Ursula
Fair Lawn NJ, zone 6b
Charter ATP Member Spiders! Native Plants and Wildflowers Region: Pennsylvania Greenhouse Cactus and Succulents
Forum moderator I was one of the first 300 contributors to the plant database! Photo Contest Winner: 2014 Ponds Lover of wildlife (Black bear badge) Region: New Jersey
Image
Ursula
Feb 8, 2015 4:18 PM CST

Moderator

Funny!
I am sure you do well in that forum, Jim!
Heh, our Ken just about lives there, doing a good job answering question.

BTW it makes a difference where one clicks on those ATP links, I found.
[Last edited by Ursula - Feb 8, 2015 5:02 PM (+)]
Give a thumbs up | Quote | Post #782901 (7)
Name: tarev
San Joaquin County, CA (Zone 9b)
Always count your blessings in life
Region: California Houseplants Plays in the sandbox Orchids Plant Lover: Loves 'em all! Composter
Cactus and Succulents Dragonflies Hummingbirder Amaryllis Container Gardener Xeriscape
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tarev
Feb 8, 2015 8:31 PM CST
I do not really get bothered by the blemishes on my orchid leaves. My mini-cyms look way worst than that, but as long as it is growing new leaves, new pbs and the pbs are staying firm and rock hard, am okay with it.

My Oncidiums always gets a lot of blemishes too, for whatever reason..have learned to ignore it. Oftentimes, the orchid will just eventually drop the leaf anyways and new growth will come out later on. I guess I am tougher on them.

I am more concerned if I see little crawlies like scales..that I have to address and remove with alcohol swabs.

Name: Elaine
South Sarasota, Florida (Zone 9b)
The one constant in life is change
Cat Lover Master Gardener: Florida Tropicals Multi-Region Gardener Vegetable Grower Region: Florida
Herbs Orchids Birds Garden Ideas: Level 2 Garden Sages Celebrating Gardening: 2015
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dyzzypyxxy
Feb 8, 2015 9:47 PM CST
I agree with you Tarev. Some blemishes on leaves you just have to live with, especially if you grow orchids outdoors. Expecting perfection is going to disappoint you, or drive you crazy. I'm glad to know what causes those little spots, though!

Jim, I get caught up on the Ask a Question forum at times, too. It's sort of fun.
Elaine

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
Name: Ken Ramsey
Starkville, MS (Zone 8a)
[url=www.tropicalplantsandmore.com]
Orchids Greenhouse Vegetable Grower Ferns Region: United States of America Hummingbirder
Composter Bromeliad Master Gardener: Mississippi Cat Lover Tropicals Plumerias
Image
drdawg
Feb 8, 2015 10:01 PM CST
As I tell anyone who will listen to me - few! - I don't grow my orchids for the beauty of the plant but for the beauty of their flowers. Of course, I will be the first to admit, beauty is and always has been in the eye of the beholder.
drdawg (Ken Ramsey) - Tropical Plants & More
[url=www.tropicalplantsandmore.com]www.tropicalplantsandmore.com[/url]
If God wanted me to touch my toes, he would have put them on my knees.
Name: Ursula
Fair Lawn NJ, zone 6b
Charter ATP Member Spiders! Native Plants and Wildflowers Region: Pennsylvania Greenhouse Cactus and Succulents
Forum moderator I was one of the first 300 contributors to the plant database! Photo Contest Winner: 2014 Ponds Lover of wildlife (Black bear badge) Region: New Jersey
Image
Ursula
Feb 9, 2015 8:26 AM CST

Moderator

Oh oh!! Ken, some people might report you to the Orchid police for saying that!!!! Smiling
......as Ursula mutters and walks away, visualizing plants with pretty varigations, patterns, and "braided"/distichous leaves AND then in bloom too.....
[Last edited by Ursula - Feb 9, 2015 9:15 AM (+)]
Give a thumbs up | Quote | Post #783363 (11)
Name: Ken Ramsey
Starkville, MS (Zone 8a)
[url=www.tropicalplantsandmore.com]
Orchids Greenhouse Vegetable Grower Ferns Region: United States of America Hummingbirder
Composter Bromeliad Master Gardener: Mississippi Cat Lover Tropicals Plumerias
Image
drdawg
Feb 9, 2015 8:49 AM CST
My "jewel orchids" have nice-looking leaves, but that's about it. But my orchids are like children. I love the ugly ones as much as the pretty ones. Whistling
drdawg (Ken Ramsey) - Tropical Plants & More
[url=www.tropicalplantsandmore.com]www.tropicalplantsandmore.com[/url]
If God wanted me to touch my toes, he would have put them on my knees.
Name: Elaine
South Sarasota, Florida (Zone 9b)
The one constant in life is change
Cat Lover Master Gardener: Florida Tropicals Multi-Region Gardener Vegetable Grower Region: Florida
Herbs Orchids Birds Garden Ideas: Level 2 Garden Sages Celebrating Gardening: 2015
Image
dyzzypyxxy
Feb 9, 2015 10:05 AM CST
I'm on the fence on this one, because I do have a few that have very nice foliage, including the gorgeous braided Den. anceps , a Paph (which never blooms) and a Phal with variegation, and two colors of jewel orchids.

But the majority of my orchids are not all that pretty, when they're not in bloom. Mostly living outdoors in Florida, I'm sure, gives them more chance to develop marks and stuff on the leaves, hard as I do try to protect them.
Elaine

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
Name: Ursula
Fair Lawn NJ, zone 6b
Charter ATP Member Spiders! Native Plants and Wildflowers Region: Pennsylvania Greenhouse Cactus and Succulents
Forum moderator I was one of the first 300 contributors to the plant database! Photo Contest Winner: 2014 Ponds Lover of wildlife (Black bear badge) Region: New Jersey
Image
Ursula
Feb 9, 2015 1:21 PM CST

Moderator

Elaine, not to think twice about it, Orchids growing in nature certainly don't always look like show pieces either!
Name: Elaine
South Sarasota, Florida (Zone 9b)
The one constant in life is change
Cat Lover Master Gardener: Florida Tropicals Multi-Region Gardener Vegetable Grower Region: Florida
Herbs Orchids Birds Garden Ideas: Level 2 Garden Sages Celebrating Gardening: 2015
Image
dyzzypyxxy
Feb 9, 2015 3:26 PM CST
That is so true, Ursula. And mine certainly could be mistaken for 'wild' orchids at times especially in summer. I do have some leaves with cold damage from last week's cool nights, too, but not too bad.

You have many more mature plants that are beautiful even when they aren't in bloom, and of course Ken never keeps very many of his to a mature size so doesn't have the luxury of seeing what they look like when they're in their glory.

I found a little bit more scale starting, so just got through spraying again with the dormant oil spray, went to get the hose to rinse everyone off and the skies opened. It is raining like summertime now, but still thankfully nice and warm, so the 'chids will get a good rinse with rain water, then I'll have to lug their dripping pots and baskets into the house later, as the cold front passes and the temps will drop before morning. We are looking at lows in the 40's every night this week, sadly. At least I am home and can protect everyone, but it's looking like lots of schlepping back and forth will be going on.
Elaine

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
[Last edited by dyzzypyxxy - Feb 9, 2015 4:15 PM (+)]
Give a thumbs up | Quote | Post #783824 (15)
Name: Ken Ramsey
Starkville, MS (Zone 8a)
[url=www.tropicalplantsandmore.com]
Orchids Greenhouse Vegetable Grower Ferns Region: United States of America Hummingbirder
Composter Bromeliad Master Gardener: Mississippi Cat Lover Tropicals Plumerias
Image
drdawg
Feb 9, 2015 3:51 PM CST
That's kind of chilly for you, Elaine. That same front you will be getting is coming through now, but it has been a dry front, with no rain whatsoever. Perhaps the rain you are getting is coming in off the Gulf. We are supposed to be down into the lower 20's by Thursday/Friday.
drdawg (Ken Ramsey) - Tropical Plants & More
[url=www.tropicalplantsandmore.com]www.tropicalplantsandmore.com[/url]
If God wanted me to touch my toes, he would have put them on my knees.
Name: Carol
Santa Ana,Ca. (Zone 10b)
Sunset zone 22
Charter ATP Member Hummingbirder Lover of wildlife (Black bear badge) Orchids Region: California Plant Identifier
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ctcarol
Feb 9, 2015 5:15 PM CST
On the other coast we're supposed to be up to 87 by Thurs. with lows in the mid 50s.
Name: Ken Ramsey
Starkville, MS (Zone 8a)
[url=www.tropicalplantsandmore.com]
Orchids Greenhouse Vegetable Grower Ferns Region: United States of America Hummingbirder
Composter Bromeliad Master Gardener: Mississippi Cat Lover Tropicals Plumerias
Image
drdawg
Feb 9, 2015 7:06 PM CST
Just rub it in, Carol, rub it in! Sticking tongue out
drdawg (Ken Ramsey) - Tropical Plants & More
[url=www.tropicalplantsandmore.com]www.tropicalplantsandmore.com[/url]
If God wanted me to touch my toes, he would have put them on my knees.
Name: Ursula
Fair Lawn NJ, zone 6b
Charter ATP Member Spiders! Native Plants and Wildflowers Region: Pennsylvania Greenhouse Cactus and Succulents
Forum moderator I was one of the first 300 contributors to the plant database! Photo Contest Winner: 2014 Ponds Lover of wildlife (Black bear badge) Region: New Jersey
Image
Ursula
Feb 9, 2015 7:12 PM CST

Moderator

I want Spring!!!!!
Name: tarev
San Joaquin County, CA (Zone 9b)
Always count your blessings in life
Region: California Houseplants Plays in the sandbox Orchids Plant Lover: Loves 'em all! Composter
Cactus and Succulents Dragonflies Hummingbirder Amaryllis Container Gardener Xeriscape
Image
tarev
Feb 9, 2015 7:24 PM CST
Ah, a little out of the topic here..but just sharing something Spring-like for Ursula Big Grin
Thumb of 2015-02-10/tarev/a19f97 Thumb of 2015-02-10/tarev/e0c579

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