white spots on jalapino leafs

[kop71]

quick history on the plant
i gave it to my son last year as a small plnat and also gave him some feed for it he came round the other day and said its taking over his room now do i want to swop it for a smaller 1 so i did but when i got it round and asked him about it he said it hadnt had any feed for about 6-7 months as he ran out (why dont they ask if ye can spare some always got loads lol)
now some of the leafs have white spots on them pic below
is this because they have not have nutrients just water for so long or a disease i dont want to put it in with the rest untill i know as dont want it spreading if it is a disease thanks for you help

[airconednightmare]

well some of the white spots on the back look like aphids, the 2 big white patches look like scortch and the general lack of colour + leaf distortion is probably nutrient defficency.

feed it, cut off the worst of the damage, kill the aphids if thats what they are, keep it isolated until it looks to be growing and bug free. or accept it's probably a bit of a write off...