black mold under Dtps leafs
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  #1  
Old 08-15-2009, 09:22 PM
murphy48 murphy48 is offline
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black mold under Dtps leafs Female
Default black mold under Dtps leafs

I just got a Dtps Little Gem Stripes from Trader Joe's and while getting ready to repot it I noticed that the underside of a few of the leaves has black mold on it.

What could this be?

Trader Joe's has a great return policy. Should I return my new little plant or should I try to fix this problem. The last thing I want it so introduce something to the rest of my orchids!

Thanks
Kristen
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  #2  
Old 08-16-2009, 01:41 AM
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King_of_orchid_growing:) King_of_orchid_growing:) is offline
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It's not a big issue. Continue growing it. They appear to be temperature related.

Rub some isopropyl and spray some hydrogen peroxide for some measure.

It really shouldn't get worse.

If it does, post it, maybe someone will come up with a solution.
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  #3  
Old 08-16-2009, 01:42 AM
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King_of_orchid_growing:) King_of_orchid_growing:) is offline
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How's your Paph malipoense, btw?
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  #4  
Old 08-16-2009, 02:30 AM
murphy48 murphy48 is offline
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Thanks for the advice. I was a bit worried as I read that black mold (probably sooty mold) occurs when there is honeydew and can be a symptom of insects... I didn't want to take this one back, it has such beautiful delicate and tiny flowers.

My poor malipoense... no sign of the mealybugs but it must not have dried completely after being sprayed with the alcohol (before I posted here and found out about neem oil). Some of the leaves have rot now. I've now put peroxide on the rot areas and dried it completely. I don't know how this plant can take anymore abuse from me! Thanks for asking.

Last edited by murphy48; 08-16-2009 at 02:34 AM..
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Old 08-16-2009, 03:55 AM
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King_of_orchid_growing:) King_of_orchid_growing:) is offline
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Quote:
Originally Posted by murphy48 View Post
Thanks for the advice. I was a bit worried as I read that black mold (probably sooty mold) occurs when there is honeydew and can be a symptom of insects... I didn't want to take this one back, it has such beautiful delicate and tiny flowers.

My poor malipoense... no sign of the mealybugs but it must not have dried completely after being sprayed with the alcohol (before I posted here and found out about neem oil). Some of the leaves have rot now. I've now put peroxide on the rot areas and dried it completely. I don't know how this plant can take anymore abuse from me! Thanks for asking.
For your Dtps keep an eye on it. See if it gets worse.

You know, this hobby can get difficult because certain times problems can be so subtle. It's often difficult to know if the problem has gotten worse, stayed the same, or have gotten better. Sometimes making a decision to act or not, and what course of action to take when it's appropriate is not easy. It comes down to decisions. Whatever you decide, you're just going to have to live with it and learn from them.

As far as your Paph malipoense, I don't think that was completely your fault. Not many people consider how the plants grow in nature. Sometimes if we're new to something we don't think about certain factors. I mean, prior to researching it, I never knew my favorite section of Paphs (Parvisepalums) primarily grew on limestone cliffs with a bit of moss and leaf litter. The only exception to this rule are Paph delanatii, which can be grown in bark, hence why they're so easy to grow and so common compared to the rest of section Parvisepalum.

The whole time I had been growing Paph micranthum incorrectly. It was no wonder they did nothing for close to a year before they died. Before they got to me, the plant was grown in bark and perlite. When I grew it, I grew them in potting soil. Now I know they should actually be grown in limestone. No wonder people always complain about section Parvisepalum Paphs being difficult to grow.

Duh! If they were growing on substrate they would've never grown on in nature, or at least a close approximation of it, of course they'll die.

My suggestion for a good Paph in the section Parvisepalum would be Paph delanatii. It may be a common plant, but at least you know it's common for a reason (high availability = everybody knows how to grow it and breed it = easy to grow).

One of my psychology professors had once said in class, "...Sometimes the best things in life are not the rare ones. Sometimes, the common things are the best, because a lot of things are known about it. But the human mind doesn't work that way. It always seeks and values the rare."

It's not an exact quote, but you get the idea. That quote is definitely something to think about. However, I will say this as well...sometimes the rare brings with them some nice surprises.

Again, a decision call.

One more thing...mistakes always happen.

Last edited by King_of_orchid_growing:); 08-16-2009 at 04:25 AM..
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  #6  
Old 08-16-2009, 01:08 PM
murphy48 murphy48 is offline
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Thanks King of Orchid Growing for all your advice, encouragement and all around helpfulness. I knew I was getting in a bit over my head with the malipoense, I was just so enticed by the idea of a fragrant green paph.

I hope it recovers now. Before the mealybug/rot incident it wasn't too unhappy with me. It was growing either another leaf or the beginnings of a spike. Only time will tell now if it will continue to be OK.
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  #7  
Old 08-16-2009, 03:08 PM
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One of the things that can cause the black sooty stuff is happy sap from blooms and or leaves , it is the sugar in it . Also the ant bait Antrol and Revenge will grow it . Gin
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