Why prune trees?
Whether the tree is large or small the first and most important step in maintaining tree health is removing of all dead, diseased and damaged branches. Removing dead limbs helps trees by reducing food source for fungi that could spread to living branches. Often the only way to control certain diseases like Western Gall Rust in Ponderosa Pines, or Bacterial Cankers in Fruit trees is to prune out the infected limbs, care must be taken to prune out infected parts at the appropriate time so as not to spread the disease further. Severe pruning such as topping and or over-thinning will stress a tree unnecessarily, which can make a tree susceptible to beetle attack and/or diseases such as Armellaria Root Rot.