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You are here: Home / Archives for Plant Pests and Diseases

The emerald ash borers are coming (eventually)!

By Sarah Greenleaf — Posted May 25, 2018

An impending threat to Oregon’s urban ecosystems If it’s not on your radar yet, it will be soon: The age of ash trees (Fraxinus, sp.) in the United States is winding down as the emerald ash borer (EAB) slowly follows a western route across the country, leaving a path of destruction in its wake. EAB […]

Filed Under: Borers, Emerald Ash Borer, Growing Knowledge, Insects, Plant Pests and Diseases Tagged With: Oregon State University, Pests and Diseases, Trees

Heroes and villains

By Jerry Weiland — Posted February 27, 2018

Research identifies harmful and beneficial microbes in nursery soil Four years ago, we received funding from the Floriculture and Nursery Research Initiative to study the interaction of soil-borne pathogens and environment on nursery plant health and disease control (Digger, July 2015). Since then, we have made significant progress in identifying the beneficial and pathogenic microbes […]

Filed Under: Growing Knowledge, Phytophthora, Plant Diseases, Plant Pests and Diseases, Pythium Root Rot, Root Rots Tagged With: Digger, Digger magazine, Oregon State University, Pests and Diseases

The sudden oak death epidemic in Oregon

By Sarah Navarro — Posted September 13, 2017

Oregon nurseries are increasingly threatened by the repeated expansion of the sudden oak death (SOD) epidemic in Curry County. Although this epidemic is geographically far away from the main nursery production areas, the continued expansion of the SOD quarantine area and the newly discovered introduced EU1 clone are distinct threats to the nursery industry. What […]

Filed Under: Growing Knowledge, Phytophthora, Plant Pests and Diseases Tagged With: Invasive species, ODA, Oregon Department of Agriculture, Oregon State University, Pesticides, Pests and Diseases, USDA, Wholesale Nurseries

Handier handbooks

By Jay Pscheidt — Posted May 1, 2017

Updated pest management handbooks are now
mobile-friendly and searchable online.

Filed Under: Blights, Cankers, Growing Knowledge, Insects, Plant Diseases, Plant Pests and Diseases, Rusts, Verticillium Root Rot, Weeds Tagged With: Digger, Digger magazine, Education, Home gardening, Landscaping, Oregon State University

Slow sand filters

By Peter Szymczak — Posted April 3, 2017

This traditional method of water purification was tested for its effectiveness at removing two common greenhouse pathogens, Phytophthora and Fusarium.

Filed Under: Fusarium Root Rot, Growing Knowledge, Phytophthora, Plant Diseases, Plant Pests and Diseases, Root Rots Tagged With: Digger, Digger magazine, Irrigation, Oregon State University, Science

Researchers look at thermal weed control

By Peter Szymczak — Posted March 15, 2017

Researchers look to control weeds in greenhouse propagation systems with steam and hot water

Filed Under: Nursery News, Phytophthora, Plant Pests and Diseases, Weeds Tagged With: Greenhouses, Operations, Pests and Diseases, Plants, Research, Science

Working smarter, not harder

By Luisa Santamaria — Posted February 1, 2017

OSU Extension Service offers programs designed to increase knowledge among nursery workers, thereby increasing their productivity.

Filed Under: Blights, Boxwood Blight, Growing Knowledge, Phytophthora, Plant Diseases, Plant Pests and Diseases Tagged With: Digger, Digger magazine, Education

Biocontrol of azalea lace bugs

By Michael Flores — Posted October 3, 2016

Researchers investigate the use of lacewing predators to combat the pesky pest of rhododendrons.

Filed Under: Azalea Lace Bugs, Growing Knowledge, Insects, Plant Pests and Diseases Tagged With: Digger, Digger magazine, Oregon State University, Pests and Diseases

A tale of two lilacs: Part II — Pubescentes

By Jason Lattier — Posted June 1, 2016

How series Pubescentes changed the horticultural landscape.

Filed Under: Blights, Growing Knowledge, Plant Diseases, Plant Pests and Diseases Tagged With: Digger, Digger magazine, Oregon State University

Disinfectants: In search of a silver bullet

By Luisa Santamaria — Posted May 3, 2016

Answers to the question, “What is the best product to use for disinfecting tools, benches and greenhouses?”

Filed Under: Growing Knowledge, Plant Diseases, Root Rots Tagged With: Digger, Digger magazine, Oregon State University, Pests and Diseases

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NURSERY NEWS

Terra Gardens owner’s gesture for his mother opens the door to other wheelchair-bound gardeners

OAN announces 2025 Friends of Nurseries award winners

OAN leads grower-driven Japanese beetle solution

AmericanHort president and CEO to step down

In memoriam: Bill Van Belle

Longtime employee buys Heritage Seedlings and Liners

In Memoriam: Melvin John Steffenson

New USDA Census of Hort arriving in mailboxes this month

More Nursery News

From the pages of Digger

March: The Perennials Issue

February: The Greenhouse Issue

January 2026: The Retail Issue

November 2025: The Transportation Issue

October 2025

More issues of Digger

Pests and Diseases

OAN leads grower-driven Japanese beetle solution

Prioritizing nursery pest challenges

New tools in the battle against thrips

Aiming for precision in pest control

Oregon’s nursery licensing program aims to keep the entire industry healthy

More articles

FARWEST SHOW UPDATES

2026 Farwest Show issues calls for speakers

Excitement, optimism prevail at 2025 Farwest Show

Dazzling plants, products garner Retailer’s Choice Awards

Youngblood Nursery wins Best in Show booth honors at the 2025 Farwest Show

Glow Sticks Fescue wins top honors from judges at Farwest Show’s New Varieties Showcase 

More Updates from Farwest

The Value of Membership

AmericanHort president and CEO to step down

OAN honors industry leaders at 2025 Convention

Meet the Leader: Patrick Peterson

More member stories

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