Neglected orchids for 3 weeks while on holiday

[Mukesh Patel]

Hello All,

I recently went away on holiday, and left my orchids, did give them a good watering before i left.

Anyway i've been back about 2 weeks and i have noticed that some of my orchids look sick.

I did have a spider mite problem on another plant in the same room but the other plant was across the room about 6 feet away and I have cut that other plant down as i could not resolve the spider mite problem no matter what i did (6 months of trying).

I did notice some insects on one of my orchids before i went on holiday, but they didn't look like spider mites, so i just sprayed with an insecticide (pyretherin based).

Anyway 3 of my orchids now look quite sick.
Photos should be attached.

Does anybody have any idea as to what this might be?