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In the Garden with the Master Gardeners
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Plant Sale 2025
Plant & Insect Clinic
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WEBSITE: WSU Extension MGs of Cowlitz Co.
Members
Take Action

Master Gardener Foundation

Learn with Us
HOME
Home
In the Garden with the Master Gardeners
Public Events
Plant Sale 2025
Plant & Insect Clinic
Raised Bed Giveaway 2025
About
What We Do
Projects
Become a Master Gardener Volunteer
How to Contribute
Speaker List
WEBSITE: WSU Extension MGs of Cowlitz Co.
Members
Take Action

 Diagnosing Plant Problems

Class Presentation Slides —MG Alice Slusher

Class Zoom Video presentation—MG Alice Slusher

Research Guidelines for Master Gardeners

WSU Pest Management Guidelines for MGs

Approved References for Pest Managment

Rhododendron and Azalea problems—guide

20 Questions for diagnosing plant problems

20 Questions for Diagnosing Plant Problems

Making the least toxic chemical choices

Lookup Individual Pesticides-Grow Smart, Grow Safe

How to use PICOL (Pesticide Information Center OnLine (PICOL) Database)

Additional Resources

Resources for WSU Master Gardeners (Plant Diagnosis and recommendations guidelines—scroll to bottom of page)

Presentation-Jenny Glass, WSU Plant Pathologist

Diagnosing vegetable disease and pests

Plant Problem Diagnosis

PDF of the Powerpoint presentation

Plant Diagnostics Bingo

Links to OSU lawn-related presentations and other information

Irrigation Rates and Frequencies for Western and Eastern Oregon Turfgrass (Jenny referred to this study)

Environmental Plant Problems

PNW Handbooks—Chemical Control of Landscape Plants for Homeowners

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Master Gardener Foundation of Cowlitz County

501(c)3 Nonprofit Educational Organizaton

304 Cowlitz Way

Kelso, WA, 98625

360-577-3014