Moth Larvae

• Bag worms are the larvae stage of a moth and the bags hang in clusters from pine tree needles. Casual passersby often overlook these clusters of thin, brown worms because of their resemblance to pine cones.
  
  

Beetle Larvae

• Beetle larvae, better known as weevils, bore into pine tree trunks and use shreds of bark for their nests. These worms look like white grubs with a sticky skin.
  
  

Caterpillars

• Pine processionary caterpillars have globular black heads and green bodies with thin, hairy spikes poking out on all sides. These caterpillars build unsightly nests around pine tree needles and branches that look like dirt and dust bunnies.
  
  

Damage

• Worm damage on pine trees varies. Some damage leads to curling branches, needle loss and bleeding trunks while in other cases, the worms eat away at the trunk so much that the pine tree slowly rots and dies.