dark spots

[VickiC]

Hi,
Could someone please tell me what the dark indented spots toward the ends of my Yam. Queen Adelia 'Kiilani' leaves are? These dark areas have affected 3 leaves. I just noticed them this morn., so I don't know how long it has taken them to develop. I'm surprised at myself that I have overlooked them in the past because I do a daily check on all of my orchids. ??

I would appreciate any help and advice you can offer.
Vicki

[dounoharm]

have you watered you plant during the evening hours? do you mist frequently? it looks either like sunburn from water droplets or possibly a fungus of some sort....i would treat it with a fungicide and spray with physan 20....gl!

[VickiC]

Hi,
I try not to water after noon, but I mist my mounts and the *above ground* roots of potted orchids about twice ea. day......usually all at the same time. I could have carelessly dropped water on the leaves in the process, though. I put the shadecloth on my greenhouse about a week ago. I waited because I thought before that would be too early, but I apparently waited too late because I've got a few orchids that are too reddish.....including this one, as you mentioned.

I have a bottle of Physan 20 that I've had a little over a year. I hope it's shelflife is still good.

Thanks for your advice,
Vicki
(By the way, I really like your album.....beautiful orchids, great greenhouse.....cute kitty.....and awesome log cabin home.....love it!)

Originally Posted by dounoharm

have you watered you plant during the evening hours? do you mist frequently? it looks either like sunburn from water droplets or possibly a fungus of some sort....i would treat it with a fungicide and spray with physan 20....gl!

[dounoharm]

thanks vicki!! i think your physan will be ok, gl with the spots!

[Eyebabe]

This looks very suspicious for Pseudomonas.

I would cut the leaf off leaving about 1-2 inches of healthy tissue. Anytime disease is isolated I perform surgery preferable over using chemicals.

This is much easier on the plant and more effective in getting rid of the problem than hitting it with physan or fungicide as the rest of the plant looks healthy

Another reason to cut: Pythium can look just like pseudomonas...and that HAS to be cut.

My only other thought is sunburn which is not my #1 "choice".