So I signed up a new residential customer to mow their lawn and to try to bring it back to life. They have had some issues so far this season with sprinkler system not working right etc. The homeowner shows me her back yard and throughout the lawn are all of these black spriders all over the place. It looks like they burrow down into the soil and are feeding off of the lawn roots. The lawn looks horrible. I'm not sure what to do because I've never run into anything like this before. Any suggestions??