Sudden Oak Death

Phytophthora ramorum is the oomycete plant pathogen known to cause the disease sudden oak death. The disease kills oak and other species of trees and has had devastating effects on the oak populations … Wikimedia

One of our customers in Rock Hill lost a 80+ year old White Oak to Sudden Oak Death. This customer has four very old White Oaks in very close proximity to the one that died. The White Oak pictured below (right) is definitely showing symptoms.

The trunk of the oak that died was completely covered in English Ivy, preventing the detection of the bleeding. Had it been caught in time, we may have been able to save it.

Wetwood, Slim Flux
Wetwood, often referred to as Slim Flux is a bacterial infection that is usually the result of an injury to the tree. It has a foul odor and more of a liquid.
Phytophthora ramorum
With Phytophthora ramorum, the bleeding is sticky and spotty. The White Oak pictured above is definitely showing symptoms.

 

Don, one of our service techs is spraying Agri-Fos, a systemic fungicide used for control of vascular fungal diseases. It is one of the few fungicides to successfully control phytophthora.

After removing the English Ivy, Poison Ivy and everything else covering the trunk of this tree, we discover this tree had succumb to the very pathogen that killed the neighboring tree, Phytophthora ramorum.

Please keep the ivy and other vines from covering your trees!  The tree that died was covered nearly to the crown!