Hi. I am new to this site and find it quite interesting but I am in need of help to see what can be done about this grass? As can be seen, it is in terrible shape with all kinds of strange things growing and with quite a few dead spots that seem to have little tunnels. Also, there seem to be little butterflies flying around. The grass doesn't grow and is very thin. Perhaps the most challenging of all is that pesticides are illegal here (zone 4). Any advice other than starting from scratch? Thanks!