None that I have found so far and chemical resistance is apparently a significant issue in control. I believe that botanigard, a product recommended on Tville that is a fungi has decreased my population, but, definitely not eliminated it. I have sprayed it twice and will use it at least 1 or 2 more times and then evaluate. If you want to become more of a thrip expert that you ever thought you might be, check out this article that talks about thrips and all of the possible means of control from chemical, to predaciuos bugs to fung to mitesi:
http://biocontrol.ucr.edu/wft.html
DM