Tree Care 101

The Plant Pest Gallery

Samples: 

 from students
maple spindle gall (mites)
dogwood anthracnose (fungus)

from visitors
pitch mass borer on white pine (insect)
  • from your instructor
    The following are located on the above page:
     oak gall (insect)
    wetwood disease (bacteria)
    slime mold (protists)
    honeydew/scale (insect & fungi)
    hypoxylon canker (fungi)
    mower blight (string trimmer)
    spider mite - conifers (mites)
    oak wilt?
    birch decline/bronze birch borers (insects)
    kermes scale (insect)
  • Large Planting of Eastern White Pine in Serious Decline
 Unknowns


Discoloration on the side of a building

 

Hypoxylon Cankers. 

Borers (just something I ran across while splitting wood... Geez, the stuff guys will do to get out of splitting wood).

California Oak Mortality Task Force - for information on "Sudden Oak Death" (SOD)

But here's an excellent resource to investigate: 

Plant Disease Factsheets (from Mary Ann Hansen at Virginia Tech)

Planet Natural offers "natural pest control" alternatives including biological control agents.