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Tree Problems

"Is your tree talking to you?"

A Healthy TreeThe National Arborist Association (NAA) has issued a press release regarding trees. After a very unusual winter and spring, now is the time to let the trees tell you something. Here are some of the tree characteristics that the NAA suggests you'll want to look for:

Color of Leaves
  • Off-color leaves may be an indication of nutrient deficiency in the soil or that the tree's root system is incapable of extracting the necessary nutrients, even though the nutrients are present. For instance, iron chlorosis causes progressive yellowing of newly emerging leaves in oaks and other species. Nitrogen deficiency also causes yellowing, but affects the oldest leaves most.
  • Certain trees are susceptible to diseases that cause a distinctive change of leaf color.
  • Premature fall coloration during the summer is generally an indication of a problem below ground that is creating stress conditions for the tree.
Misshapen Leaves
  • An upward curling of the leaf margin (cupping) is the classic symptom of damage from herbicides. Has your lawn (or a neighbor's) been sprayed for weeds recently?
  • Distorted leaves may be evidence of sucking insect damage or the presence of a disease organism.
Thinness of the Canopy
  • Typically, when the uppermost part of the tree's canopy begins to thin, the condition is characterized as decline. However, decline can have several causes, sometimes acting in combination, that are treatable.
  • Does your tree trunk look like a telephone pole (straight) where it enters the ground or does it have a natural root flair. The combination of thin crown and telephone pole appearance usually indicate that the tree's roots have been covered with fill.
  • The combination of thin crown and flat trunck on one side are the symptoms of a root that is literally strangling the tree.
No Leaves or Losing Leaves
  • If a tree has failed to produce leaves this season, you have reason to be concerned, especially if you have other trees of the same species in the yard. Sometimes, quick action is required to keep a serious problem from spreading.
  • If a tree loses all or most of its leaves during the growing season, again, sound the alarms! This may be a sign of a very serious disease or a leaf-eating insect. Either way, trees can not survive long if they are repeatedly defoliated.

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