I have a customer whos side lawn is part dead. It looks how crabgrass looks after it dies for the season but its zoshia/bermudua. Its not dormant its dead. I looked for grubs and nothing and no signs of insects. I don't know what to tell the guy and I'm afraid if whatever it is spreads im in trouble. The weeds are growing fine in the area now and I don't think its been like this all winter either.