Spider Mites

Characteristics
Spider Mites are very tiny and hard to see, therefore difficult to identify. They are typically less than 1 millimeters in length and red or brown in color and produce a webbing at the base of the needles.

Damage
  • Attack conifers
  • May cause yellowing of needles
  • Usually do not pose a major threat to the health of the tree in smaller numbers
Control
  • Can be controlled by washing the tree down with high pressure water
  • A miticide application may be needed if infestation becomes severe
  • Dormant oil application in the early spring will help to control numbers
Webbing caused by Spider Mites with the photograph courtesy of Michigan State University