window screen is a cool technique. I posted a year or two ago maybe on another site??? that one of the trees my dad help me plant was girdled by moles,voles, some brown furry satan with a tail, and I was sick to think I lost it. Well. I am happy to say.. IT'S ALIVE IT'S ALIVE! Still living and still plugging along. it scabbed over and keeps on going. I prunned all my trees about 4 weeks ago and I should have taken pics..