Loading...
Manage Pests
Home & Landscape
Home and Landscape Pests
Video Library
Blogs
Newsletters
Invasive and Exotic Pests
Tools
Bee Precaution Pesticide Ratings
Pesticide Active Ingredient Database
Plant Problem Diagnostic Tool
Seasonal Landscape IPM Checklist
Weather, Models and Degree Days
Wildlife Identification Tool
Resources
Glossary
Landscape Professionals
Natural Enemies Gallery
Pest Management Sites
Recursos en español
Retail Nurseries and Garden Centers
Schools and Child Care Centers
Structural Pest Management Professionals
UC Master Gardeners
Weed Gallery
Agriculture
Pest Management Guidelines
Invasive and Exotic Pests
Pesticide Information
Tools
Bee Precaution Pesticide Ratings
Decision Support
Weather, Models and Degree Days
Resources
Glossary
Mitigating Pesticides
Natural Enemies Gallery
Pest Management Sites
Weed Gallery
Natural Areas
Natural Area Pests
Events and Trainings
About
Search
Donate
×
Close
Feedback
×
Search
search
Search
Home
A group of dark lesions on a walnut trunk due to shallow bark canker,
Brennaria nigrifluens
=
Erwinia nigrifluens
.
Credit: Jack Kelly Clark
