Improper pruning causes extensive damage and sometimes, tree death. To prune your trees without causing damage, your knife needs to be sharp. You should use a handsaw for anything you can’t cut with a knife or pruning shears. Get a horticultural disinfectant so you don’t spread plant diseases. If you prune in the wrong spots, spread disease or prune with dull tools, you’ll do more harm than good.From this passage, you can infer that