Grass and Bamboo: Lawn problem, 1 by Plant_Madness

Plant_Madness wrote:
I couldn't find the lawn forum although I swear there used to be one... I have these weird zig zag patterns appearing in my lawn. At first I thought my teenage son and his friends had gotten something on the lawn but it appears to be growing. I dug out some lawn and checked for bugs.. found a few very slender 1/2" worm things but there didn't appear to be enough to call it an infestation or enough to do the damage..
Any ideas ??!!