Frank Richards, you have found the answer! Proper use of right chemical! The problem is many would not want to just apply to only problem trees, just wholesale spray everything. Have to get bac or TV show, game, etc. People today often want a fast, cheap, easy solution to any problem. My lymphoma was caused by a farmer spraying his field with RoundUp even on windy days. He did not have time to do only on windless days. Wind carried it up the bluff to me. Lucky, I went from 3 months just by eating organic, deleeting sugar and prayer from many friends. In one year I was in remission. If he had been like you, responsible, considerate of others around him, I most likely would not have gotten lymphoma.