title: Japanese oak wilt
text: # Japanese oak wilt
  
  Japanese oak wilt (also called mortality of oak trees in Japan) is a fungal disease caused by Raffaelea quercivora fungus affecting by oak trees. In 1998, Japanese plant pathologists group was isolation, inoculation and reisolation the dead tree. It is the first disease known that Raffaela fungus cause plant disease.
  
  ## Symptoms
  
  The first obvious symptom was that the leaves wilted, and many small holes appeared on the trunk. The leaves turned to red and died back quickly (1 or 2 weeks), and finally the tree died. If you cut the dead tree, you would discover the xylem had been discolored to brown.
  
  ## Mechanism
  
  The oak trees react plugging their xylem with gum and tyloses for blocking the fungus spreading. It's the same reaction of elm vs. Opiostoma fungus at Dutch elm disease.
  
  ## Treatment
  
  JOW treatment is resemble other fungus insect vector diseases such as Dutch elm disease or Pine wilt.
  
  ### Exterminate beetle
  
  The majority of this disease treatment is cut down the dead oak trees, and killed the vector ambrosia beetles by burned timber or infused insecticide.
  
  ### Exterminate fungus
  
  Some fungicide are developing and trying to inoculation.
  
  