What to do about damaged trees

08/06/2011 12:00 AM

08/06/2011 12:07 AM

Lots of trees were damaged by the storm that blew through the Wichita area on Wednesday night. Here are some pointers from Ward Upham of Kansas State University and Extension about assessing and taking care of the damage.

1. Be safe: Check for downed power lines or hanging branches. Don't venture under the tree until it is safe. If large limbs are hanging precariously, a certified arborist has the tools, training and knowledge to do the work safely.

2. Cleanup: Remove debris so you don't trip over it.

3. Decide whether it is feasible to save a tree. If the bark has been split so the cambium is exposed or the main trunk is split, the tree probably will not survive and should be removed. If there are so many broken limbs that the tree's form is destroyed, replacement is the best option.

Topping, in which all the main branches are cut and only stubs are left, is not recommended. Though new branches will normally arise from the stubs, they are not as firmly attached as the original branches and more likely to break in subsequent storms. Also, the tree must use a lot of energy to develop new branches, leaving less to fight off diseases and insect attacks. Often, a topped tree's life is shortened.

4. Prune broken branches to the next larger branch or to the trunk. If cutting back to the trunk, do not cut flush with the trunk but rather at the collar between the branch and the trunk. Cutting flush with the trunk leaves a much larger wound and takes longer to heal. Middle-aged or younger vigorous trees can have as much as a third of the crown removed and still make a surprisingly swift comeback.

5. Take large limbs off in stages. If you try to take off a large limb in one cut, it will often break before the cut is finished and strip bark from the tree. Instead, first make a cut about 15 inches from the trunk. Start from the bottom and cut one-third of the way up through the limb. Make the second cut from the top down but start 2 inches farther away from the trunk than the first. The branch will break away as you make the second cut. The third cut, made at the collar area, removes the stub that is left.

Upham notes: "Pruning can be dangerous. Consider hiring a trained arborist to do major work such as this. Also, a good arborist knows how to prune trees so that storm breakage is less likely to occur. Preventing damage is better than trying to fix it once it has happened."

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