"Generally" if it only affects the older leaves and new leaves seem to be
normal then I don't get too upset about it (other than the plant looks like
crap for a while). Keep and eye on the new leaves and if you continue to
see the stuff creep up the stem then you have to find the problem.

Gene



"BruceM" wrote in message
...
That is a possibility. They are located on a wire shelf about 3-4 feet
above the kitchen sink. They also get watered in that same sink. On of us
could have cleaned the counters wth a spray while they were being watered.

Seems to be only the older leafs that are affected. I wasn't sure about
chemicals as they are surrounded by african violets that are doing great.
However if the damaged occured while they were off the shelf.....



"Gene Schurg" wrote in message
news:R_9Ji.642$TH2.589@trndny06...
Bruce,

That could be a bacterial result or chemical. Have you sprayed them with
anything?

Could someone have been cleaning and oversprayed and the chemical burned
the leaf surface? Is it on all the leaves or just the older/newer ones?

Last winter I cleaned the floor in my greenhouse with a power washer.
Some Phals were on the bottom shelf and the overspray of just water got
on the leaves. I didn't think anything about it since it was only water.
A couple of months later I had a bacterial marks all over the leaves.
They are outgrowing it now and the new leaves are just fine. The old
leaves look like crap and in another year they will be gone and I can
show the plants again.

Good growing,
Gene


"BruceM" wrote in message
...
Dendrobium, west facing window, 1 " faux blinds cracked about 1.5 inches
open. Plant about 6 inces from blind

Has that brown / red sand look like a spider mite infestation, but high
power magnification shows no mites, and it does not run or rinse off.
Close viewing looks like pitting of the leaves


http://home.tx.rr.com/lec/1.jpg
http://home.tx.rr.com/lec/2.jpg