Bagworms Description:

Bagworms are destructive pests of shrubs and woody ornamentals that are native to North America. Their spindle-shaped protective bags made from silk, debris, and foliage provide camouflage, so they go unnoticed until there is significant plant damage.

Hosts:

Bagworms attack more than 120 species of both deciduous and evergreen trees and shrubs, but the most common species include:

  • Arborvitae
  • Maple
  • Birch
  • Oak
  • Cedar
  • Poplar
  • Elm
  • Spruce
  • Honey locust
  • Willow
  • Juniper
  • Linden

Biology & Symptoms:

Bagworm caterpillars eat the foliage of woody plants. Trees with heavy bagworm infestations may become defoliated entirely. Infested evergreens may not experience re-growth and attacked branches often die.

How to Get Rid of Bagworms:

Cultural, biological, or chemical management practices work together to rid the affected trees and shrubs. Foliar applications of Bt (Bacillus thuringiensis) or any other recommended
insecticide should be made when young larvae are first observed. Thorough foliar coverage is critical.

Heavy infestations may require a second application. Cultural management includes homeowners hand-picking bagworms off the affected trees and shrubs. All bags must be removed and destroyed. One bag left on the tree or shrub could lead to re-infestation. If you think your plants may be infested with bagworms, call your local arborist for a consultation.

See More Articles

Pest And Disease Center Barklice Banner 1440X500
Webs or Bags

Bark Lice

Bark Lice are small, dark-colored insects that produce fine, dense webbing on the trunks of host trees. Varying in color from tan to black, these pests may or may not have wings, and are usually less than five millimeters long.
Read More
Pest And Disease Phytophthora Bleeding Canker Banner 1440X500
Substance on Leaf or Oozing

Phytophthora Bleeding Canker

Phytophthora bleeding canker is a disease caused by multiple species of Phytophthora, which invade the bark and outer sapwood of trees.
Read More
DSC 8019
DSC 8019

Get In Touch With Us!

We pride ourselves at Davey Tree on providing prompt, professional and personalized service from certified arborists that live, work and engage in your community. Contact one of our Davey Tree specialists for your residential needs.

Let's Find What
You're Looking For!