I've got a customer w/ a juniper/nutgrass bed. She wants the nutgrass out. She is not concerned with damaging or killing the juniper, I would rather not. Also in the beds, under a layer of pine straw, is cheap black plastic "fabric" with nugrass growing through it everywhere. Should I just take this up? Could this inhibit the effectiveness of the pesticide? This is a well established stand of nutgrass. Any help would be greatly appreciated. Also, I took my pest exam a couple of days ago. I was well prepared for it. I expect to have "restricted use" access within 4-6 weeks.