necrotic spots, leaf discolorations, what is it?

[katsucats]

Okay, so I'm new to the forum and new to growing (orchids, at least).

After I bought the orchids, I looked all over the net finding any relevant information... and became very paranoid. I even bought 25 of those Agdia strip things, and it turned out they were handy. One of the plants that were shipped to me as a "gift" for buying 4 plants turned out positive for ORSV. That was thrown away. The remaining plants were potted in S/H medium and left in my backyard. I had neglected them for awhile, but now I'm going to do it seriously.

I had one plant, nearly a year later after having bought it and tested negative, turned positive for CymMV (that was thrown away). How? I don't know.

Now, I have 3 plants left, and I hope to save them.

I trimmed off most of the mushy roots, and moved these to my bathroom by a west window about a month ago. I've also tested them for viruses multiple times, a month apart. They were all negative. The plants appear back in growth after the move, albeit slowly. But there's a couple things I'd like to ask people more experienced than I, just to be sure...

1. I have these perfectly circular necrotic spots all over my Rhynchovanda Colmarie, which I assume are bacterial brown spots. I hope someone can confirm. I've been spraying Physan 20 and they don't look like they're spreading.

2. Those wrinkled leaves, I'm assuming is cold damage or dehydration from the period I left them outside over the winter (mild winters here in SoCal, but still...). I hope newer leaves return to normal.

3. The plant has a lot of these circular spots (ring spots?). Like I said, it tested negative for CymMV and OSRV, but what are they? They could be fungal or something, or some other virus that I have to spend another $100 on? Aggravating.

4. Here's my Dendrobium goldschmidtianum, which also tested negative for the 2 viruses. It has weird leaf discolorations, that I recently discovered. I hope it's just heat stress or something, and not ByMV or DeMV, or TMV (we did have a smoker in the house, he's now gone).

Thanks for reading this, and I'll appreciate all the help I can get.

P.S. It won't let me post any URL's, even if it's linking to the gallery from the same site... so... please check my gallery for more information.