Question
Dear Jim Kawasaki

Thank you very much for your kindness sending an very important ansewer about phalaenopsis. And I'm sorry for prividing unclearly information about either mayself or plants.

My name is kong kynet, I have been working for the first leading institution in terms of agriculuture in Cambodia called Cambodain Agricultural Research and Development Institute (CARDI) in Plant Breeding office. My responsibility is vegetable and ornamental plant (tissue culture research).

Actualy, there are a few kind of flowers have developed from tissue culture method, but in just small quantity. Phalaenopsis were the consider as the brand new variety which have grown in the country. There is slighly low air movement in my old greenhouse, that's why I decide move to the new one. I think air movement in my new greenhouse is ok and all my planlet are seperated in individual wood-pots as they are gradualy grow bigger and bigger since transfering from flask in end of 2005. You know all the root of infected plants are healthy and it seem not effect to the root, just the leaf. As I told you, the leaf start to core in round shape with seem like water inside.
One thing I really suspect is rain-water, cause we're now in raining season while the new greenhouse is not cover by plastic that allow rain-water go down directly and deeply into it. Normaly temperature in greenhouse rang from 29-35 篶.

Finally, may your wish come true!!!

With my best regards,
kong kynet

Answer
Hi Kong Kynet,

Thank you for the background information and where you live.  I wish you much success in your work endeavors.  

Yes, growing them in an environment in which they get rained upon frequently can be a major contributor to the problems you are experiencing.  If putting a roof on your growing area is not possible at this time, you might try tilting the orchids to one side about 30 degrees, this will allow rain water to flow off the leaves.  This, along with better air movement, may help minimize or reduce the problem.  

Hope this helps.  

Jim Kawasaki
San Jose, Ca.