ElPolloDiablo said:How do those spotted leaves look like on the underside?
Yeah, the larger leaf reeks of whitefly damage to me (I've seen quite a lot of that!). You'll find tiny eggs on the underside if that's the case. I treat that with neem oil with good results (you have to lift the leaf and hit the bottom with it but good), but some friends have told me that it doesn't work for them. An insecticidal soap should work if neem doesn't.