
Learn About Tree Pest and Disease Management


Gypsy Moths
- Egg masses on tree trunks and outdoor objects
- Holes in leaves
- Defoliation of trees

Hemlock Loopers


Aphids

Tar Spots


Diplodia Tip Blight

Eastern Tent Caterpillar


Tree Borers

Bronze Birch Borer


Hemlock Wooly Adelgid
- White "woolly" sacs that resemble tiny cotton swab ends at the base of hemlock needles on young twigs; these are most obvious in the spring
- Premature bud and shoot dieback
- Premature needle loss
- Thinner, greyish-green crown (healthy crowns are a shiny, dark green color)
- Dieback of twigs and branches
- Discolored foliage
- Death within 4 to 15 years
