Bulbophyllum with green splotches on leaves - Orchid Board

mclyle · #1 07-05-2009, 05:58 PM

I recently purchased a "pot" of bulbophyllums from a warehouse in Fla. There are lots of Bulbos. Some of the leaves have a light green splotchy covering. Anyone have an idea what it could be? Too much heat? Too much water? No pests that I can see. Bulbos look healthy. I posted pictures in my (first) album. Hopefully, the setting is correct for viewing. Suggestions, please!!!! Thanks.

King_of_orchid_growing:) · #2 07-05-2009, 10:48 PM

Can you post a pic on the thread instead?

My first guess would be that it's algae.

Ray · #3 07-06-2009, 08:03 AM

Sometimes plants will get areas of different coloration when there has been a drastic change in the fertilizer, especially if there was a deficiency to start with.

mclyle · #4 07-07-2009, 02:01 AM

I finally figured out how to do it. Thanks, McLyle

mclyle · #5 07-07-2009, 02:08 AM

Here are the pictures of my orchid with the problem. Any help will be appreciated.
McLyle

mclyle · #6 07-07-2009, 02:12 AM

If it is an algae, how do you control it? Is it a bad thing? I must have at least a dozen bulbos in this pot...not all of them are discolored.
McLyle

King_of_orchid_growing:) · #7 07-07-2009, 02:34 AM

Could be powdery mildew.

I'd wipe that stuff off.

You can use isopropyl alcohol and rub it off with a paper towel. For the tough to reach areas you can use a Q-tip.

Don't let the alcohol drip onto the roots. And definitely don't dump the stuff onto the plant.

mclyle · #8 07-07-2009, 10:57 AM

Wow! It worked. I put alcohol on a paper towel and wiped 3 leaves with it and, of course, the paper towel turned green!!!! I'll have to do some research about what causes powdery mildew. Many, many thanks for your help!!!! McLyle

Ray · #9 07-07-2009, 01:30 PM

Isn't powdery mildew more of a blue/gray color? If it wiped off green, I'd go with the algae.