Disease in my garden! (Photo Intensive!)

Hey y'all, here's a couple of pics. of some plants with some issues in my garden. This has got to be the best group of people to ask about deficiencies, fungus, insects, and viruses. In the pictures I have a scarlet curcuma (ginger family), an avocado with some rusty leaves, some peppers with odd new growth, and two orchid trees with some type of rust. Any tips will be greatly appreciated. Thank you. BSG.

Hey there a photos like that on another thread, its for ganja though. But no one could ID it so far. I said to them what I say to you, looks like tree leaf rot, but there not trees, so I cant really help. Best advice, could be systemic so remove affected leafs,leach medium,, if it persists then it somithing in the soil. Looks more like a diease than a deficit. Sorry couldnt help further.
Take it easy..

Well the plant is definitely stressed. Browning on leaves usually is related to a lack of water or maybe you've over fertilized. Yellowing usually means over watering. I'd check to see if the plant is root bound, and to make sure that you have soil that drains well-- it's a good place to start and often a culprit. Good luck to you.

Re all those plant smaybe in the same kind of potting soil?
Might be missing some trace minerals, I would not put a fungal diseas out of the scope either, takeing those pics to your local nursery, and maybe a small tub of soil, will get you sorted out.