Hello, About a week ago I switched to using MSMA for crabgrass control from drive, because it was so much cheaper. I blanket sprayed a few lawns because the crabgrass was so bad. These lawns have turned completley brown. I realize that it says on the label some discoloration may occur, but I am talking a dark, solid brown. Is it normal for them to discolor that much? I hope I am not going to have to replace there lawns. I checked my math, even going back to the jug (which was new) and measured whats left to make sure I did not mix to hot. I used 1oz per K, The temps were a little hot, but it does not say not to spray in the heat on the label, only that effectivness may be reduced in temps over 70 degress. The grass was primarily fescue.