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Welcome to the Pacific Northwest Nursery IPM Website

Newest pages: Clover mites and azalea sawfly gallery

Looking for trouble? One can see the damage early this year from eriophyid mites such as pear leaf blister mite. Narcissus bulb flies are up around bulbs now. Honeylocust plant bug has been spotted. Aphids begin to show up on many deciduous hosts this time of year. Check for aphids on birches, maples, and beeches. Not to soon to look for the spit of spittlebugs. Now is a good time to monitor for egg hatch of boxwood psyllid, flights and damage of pear blight beetle, egg hatch for boxwood spider mite and spruce spider mite, egg hatch for western tent caterpillar, and adult emergence and feeding of barypeithes root weevils. Adult emergence of elm leafminer coincides with leaf bud break. Viburnum leaf beetle is out up in infested areas of Washington.

This is a key timing for disease prevention and monitoring too. There are already signs of brown rot, botrytis, bacterial blight, cedar-broom rust (and spores released from these Gymnosporangium rusts can infect roseacous hosts like serviceberry and pears, even Sorbus). Look for leaf blotch on peony now.


This website has been established to provide educational materials and links for the identification and management of pests in commercial nursery production in the Pacific Northwest.

The PNW Nursery IPM Website is designed to be dynamic, allowing growers and pest management professionals to give and receive information regarding pest activities in nurseries in the Pacific Northwest. For more information on how this works, click on the Intro section of the website. The email Alert system is a free service sending out pest management information with regional, national, and international pest information pertinent to nursery production. Register here to receive email pest Alerts. Click here to view Pest Alerts.

New Pest activity alerts @PNWNurseryIPM at Twitter.com

This is a constantly expanding website. Many of our links are under construction and will develop further. Watch us grow.

New Sections

sapsucker damage

amber snails

boxwood blight (link to NC state's alert)
Deny Disease resource list
Gymnosporangium rust on serviceberry
impatiens downy mildew

ash whitefly
azalea lace bug updated
azalea sawfly
birch aphid updated
boxwood psyllid updated
maple aphids updated
March flies updated
Narcissus bulb fly updated
pear blight beetle updated
pine spittlebug
meadow spittlebug updated
white pine weevil updated
western tent caterpillar updated

boxwood spider mites updated
clover mites

Other resources:
Insectary plants
Phenological indicators of pest activity (shovel-ready project)
Tips for Diagnostics

Find out more about OSU's Nursery, Greenhouse, and Christmas Tree Program OSU Nursery Greenhouse and Christmas Tree Program

Hold the Date!

Biological Control
Workshop & Tour

June 15 & 16, 2016
More info soon

While you are at it

Hold October!


Pest Management Workshops
for Greenhouse and Nursery Growers
Every Thursday in October





Website editor:
Robin Rosetta
Page last modified 4/28/16

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