White powder looking stuff on the leaves, what is it?

OK my friends, now I have a white powder looking stuff on my leaves, what is it and how do I get rid of it?
Every time I turn around something is causing me trouble...HELP!

any pics? Powdery Mildew? spray with a 1 part milk to 9 parts water solution. Then use potassium silicate with neem oil once a week
Sidd

It's probably PM. Do a quick search on how to remedy this. I use Eagle 20. Try and keep an eye on your temp swings and humidity after you treat. Good Luck, Peace