I hijacked my post from Joseph's sticky:
on 2/2/2007: Don't ever try this yourself, someone might get hurt....
All right, I tried a mix of ground blood worm, Root Shield, and ground Ironite (2:2:1). it BURNED the leaves within an hour!!!!
I will try a different mix this weekend on different pings - most likely a 10:5:1.
Today: many of the burned leaves simply have small pits in them where grains of ironite landed. Other than that, the plants that recveived the strong Ironite mix are doing great!
I am trying the 10:5:1 mix today on the other pings to compare the results and (hopefully) not get the burned leaves.