Soak the water in some old tabbaco and chili peppers as well. They sell tabacco powder out east, but there has never been a market for it, plus i think it still falls under ATF rule.

I haven't noticed them anywhere else other than the lime tree. I was trying to pick them off and whatever it is seems to fall apart but yet sticky. And yes they are very white.

Always a good remedy...just be consistant though..one treatment alone won't rid you of them..