American Mistletoe (Phoradendron serotinum)

American Mistletoe (Phoradendron serotinum)Tree thief, is the green vegetative growth most obvious in the dormant season on deciduous trees.  In this area of North Texas, it is found most often on Elm species such as Hack berry (Celtis Occendenialis), American Elm (Ulmus americana), and Cedar Elm (Ulmus crassifolia ) and Bois d’Arc (Maclura pomifera). When present on other species, it is generally an indication of poor vigor such as Ash, Maple and Oak.  Conifers are of no issue in North Texas.

Mistletoe parasites the host tree by sending roots (haustorium) into the host tree.  There are many circumstances involved in the successful establishment of mistletoe.  They are as follows:

  • Birds or mistletoe plants
  • Host species or weak/unhealthy tree
  • Favorable growing season (wet)
  • Favorable growing conditions

All of these circumstances have to be present in some degree in order for the parasite to be successful.  Once mistletoe is established it would be important to begin a strategy to recover the tree from this infection.  Begin an annual treatment to stimulate health and vigor, irrigate properly and remove mistletoe.  Find a board certified master arborist or certified arborist if one is not available to consult with on a plan to recover the tree.

Some city ordinances require homeowners to maintain clearance of generally 14 feet over street and alley and 7 feet clearance over sidewalks. Municipalities are now under pressure to generate revenue and this is certainly one of the areas they are looking at.  Large dead limbs or limbs that are contacting any house or structure also need to be removed. Contact Advanced Tree & Shrub Care today to learn more!

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