I was reading another post and freaked out, literally had like 15 web pages up trying to search out a cure and research it at the same time.. There is little white particles all over my friend's 2 1/2 week flowering citral. It is a monster plant and is already almost 6 feet, it would be a shame and a big bummer if it turned out to be powdery mildew.

When I looked up Powdery Mildew it looks nothing like what is all over my plant, and when I wipe my finger over the 'powder' it easily comes off, which made me believe it was just dust. The lights are off now but I'll get a picture soon.