UC IPM Online UC ANR home page UC IPM home page


SKIP navigation



Other Pests and Damage You May See—Late Spring

On this page
  • Phytophthora root and crown rot cankers
  • Ground squirrel burrows
  • Tree squirrel damage
  • Crown gall
  • Fall webworm tents

Names link to more information on identification and management.

Click on photos to enlarge

Phytophthora root and crown rot
Phytophthora root and crown rot cankers
Identification tip: To confirm the presence of Phytophthora crown rot, cut away the outer bark and look for a canker that has water soaked margins and extends through the inner bark and cambium.

Ground squirrels burrows
Ground squirrel burrows
Identification tip: The burrow openings are about 4 inches in diameter, but can vary considerably.

Tree squirrel damage
Tree squirrel damage
Identification tip: Look for bark chewed off of scaffolds.

Crown gall
Crown gall
Identification tip: Crown gall appears as rough, abnormal galls at or below the soil surface on roots or trunk.

Fall webworm
Fall webworm tents
Identification tip: Caterpillars feed inside silken tents, enlarging the tents to cover more food as available food is consumed.

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/C881/m881spotherpests.html revised: June 24, 2016. Contact webmaster.