Sorry for not posting sooner to thank all of you who replied. Not sure
where I'll go from here, but thanks for all the ideas and input. Whatever
it was seems to have run it's course. I'll have to keep a closer watch in
the future. Thanks again!

"eeyore" wrote in message
...
Hello,

Sorry I can't post photos, but I'm wondering if anyone could identify
what would cause a white, almost powdery look, on the top of the leaves.
This leads to yellow leaves or black blotches on the leaves and then a
dropping of all the leaves. Roots look fine, but not sure what chance I
have with nothing but roots.

Started with my phal's but is expanding to all varieties. Very hot
summer here so at first I assumed it was sunburn, but since it continues
into the fall, it has to be something else.

Hope someone can help, I'm not a scientific grower, just been having a
lot of fun buying orchids that have dropped their blooms for a cheap
price, and getting them to rebloom. I was doing great, until whatever
this is took over.

Thanks!