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When A Tree Grows New Bark

The car struck the tree at more than 60 mph. The teenage driver was dead and his girlfriend was in intensive care. The car was wrapped around a tree and the car battery had gone thru a metal garage door about 25 feet from the tree. The 15 inch Cedar Elm was standing...

Image of a tree trunk that has grown new bark
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What You Should Know About Soils

(updated March, 2017) Soil is more than sand, silt, and clay with some small amount of organic matter.  You may have 3 inches of clay over caliche, or 12 inches of blackland clay, or 5 feet of sand over hardpan. Whatever you have, soil is teaming with life. Experts...

Trowel holding a scoop of rich brown topsoil
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What is Oak WIlt?

updated April 2020) What is Oak Wilt? Typical leaf necrosis Oak wilt is a vascular wilt disease caused by a fungus that infects the water-conducting tissues of oak trees and causes them to wilt and die. Good health does not improve resistance to this disease. If the...

Oak Wilt leaves showing the rainbow necrotic patterns of the veins
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Trichoderma and Hypoxylon Canker

Shella McBride and David Appel in their article on Hypoxylon Canker for AgriLife Extension state that once Hypoxylon Canker is evident, it is usually too late to save the tree.  The Arborlogical Services web site says that it is extremely rare to see Hypoxylon Canker...

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Tree Vents

Purpose: To provide air, water and fertilizing ports in the root area of trees that have paving over their root zones. Their main value is to vent toxic gases to the surface and to allow oxygen to enter the soil under the paving. Their secondary value is for water and...

Photo of a tree vent and sleeve in a paved surface
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Root Collar Problems

The most likely cause of tree problems in the urban setting in our area is buried root collars. I seldom have a day in which I do not diagnose a root collar disorder. In my experience, it is by far the most common cause of tree decline and death and is responsible for...

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Pruning Recommendations

PRUNING, when properly performed, is beneficial and can reduce the risk of stem and branch failure; provide clearance for structures, vehicles, and pedestrians; improve health and appearance; and improve views.  Improper pruning techniques are harmful for a tree’s...

Prunning recommendations diagram showing typical pruning areas on a tree
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New Tree Planting

When you plant, it would be good to have a landscape plan and to plant your trees and shrubs according to that plan. It is best to place trees and shrubs so they can develop without crowding each other, structures, or utility lines. It helps to know the mature size of...

Photo of stem and root structure of a young tree out of the ground