Bleeding Cankers On Beech, Maples, and Oaks!

Bleeding Cankers On Beech Tree
Bleeding Cankers On Beech Tree

Are you starting seeing wet looking, oozing areas on the trunk of your ornamental and shade trees? If so what you are seeing is most likely an infection in the bark of your tree by various species of Phytophthora, commonly called Bleeding Cankers. These cankers impact the vascular system of the tree, inhibiting important energy transfers ultimately leading to defoliation, increased stress, insect infestations, and the death of the tree in bad cases.

Highly Susceptible Species In Our Area:
  • Beech
  • Maple
  • Oak

Although these species tend to attract the micro-organism Phytophthora, all ornamental and shade trees are at risk of contracting the infection.Mature trees also have a high rate of infection.

Signs & Symptoms:
  • Reddish-brown fluid oozing from crack in the bark.
  • Above the infected area, foliage may be pale and sparse and branch dieback may start to occur.
  • A strong alcohol, fermenting smell that attracts insects to the infected areas of the tree.

There are a number of measures that can be taken to suppress Phytophthora. A Certified Arborist will be able to prepare a program to suppress the micro-organism, increase the tree’s health, and prevent a repeat infection next year.

Canopy Protection Members, you can rest assured our Arborists and technicians will spot any bleeding canker problems during routine inspections. If you are noticing any of these symptoms mentioned above feel free to reach out to us so we can adjust your inspection schedule if necessary.

2 thoughts on “Bleeding Cankers On Beech, Maples, and Oaks!”

  1. Ben Moe says:

    I believe my trees are being infected with bleeding cankers, I have photos if you can please help me confirm what is killing all the trees on my land, thank you so much!

    1. Rtectree says:

      Thank you for your comment! If you are in our service area, we’d recommend meeting with one of our Certified Arborists to determine the cause and extent of the damage you are seeing, as well as to create a customized solution for your specific trees. You can call our office at 703-573-3029 or book an appointment online (

      If you are not in our service area, we recommend checking out the International Society of Arboriculture’s website to find an ISA Certified Arborist who services your zip code (

      Thank you!

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