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

Progress towards effective Phytophthora root rot control

By Jerry Weiland — Posted October 31, 2023

OSU research shows different approaches required for management of common rhododendron disease.

Filed Under: Cankers, Growing Knowledge, Phytophthora, Plant Diseases, Plant Pests and Diseases, Root Rots

Knowing your cedar pests (Part 2)

By Jay Pscheidt — Posted December 20, 2021

Part 2: Thuja, Juniperus and Cupressus It’s important to be aware of issues in the landscape and forest, as these can become problems in the nursery or for your customers. On the flip side, problems not detected in the nursery can become big issues when planted out at the customer’s end. Cedar trees have a […]

Filed Under: Beetles, Blights, Borers, Cankers, Growing Knowledge, Mites, Plant Diseases, Plant Pests and Diseases, Root Rots, Rusts Tagged With: Digger, Digger magazine, Growing Knowledge, Oregon State University, OSU, Pests and Diseases

Villains of the greenhouse

By Jay Pscheidt — Posted March 23, 2021

When seedlings fail, Rhizoctonia damping-off, root and stem rot may be the cause There is so much hope for the future when we plant seeds, but that can be dashed when they don’t emerge, or when they fall over soon after popping out of the media. There are many fungi that live and survive in […]

Filed Under: Blights, Cankers, Fusarium Root Rot, Growing Knowledge, Plant Diseases, Plant Pests and Diseases, Pythium Root Rot, Rhizoctonia Root Rot, Root Rots Tagged With: Digger, Digger magazine, Oregon State University, OSU, Pests and Diseases

Knowing your cedar pests

By Jay Pscheidt — Posted January 7, 2021

Grower awareness of problems can protect both grower and customer It’s important to be aware of issues in the landscape and forest, as they can become problems in the nursery or for your customers. Cedar trees have a number of pest and problems to be aware of, from abiotic disorders to insects and diseases. Some […]

Filed Under: Blights, Cankers, Growing Knowledge, Phytophthora, Plant Pests and Diseases, Root Rots, Rusts, Scales Tagged With: Digger, Digger magazine, Growing Knowledge, Oregon State University, OSU

Fire blight in the plant nursery

By Ken Johnson — Posted January 1, 2020

How did it arrive here, and what can be done? Fire blight is a disease that can kill apple and pear trees. It is especially dangerous in a nursery setting, for reasons we will explain. The disease can result in the direct loss of plant material, which in turn can necessitate a costly and difficult […]

Filed Under: Blights, Cankers, Growing Knowledge, Plant Diseases, Plant Pests and Diseases Tagged With: Digger, Digger magazine, fire blight, Growing Knowledge, OAN, Oregon State University, OSU

Testing the waters

By Jennifer Parke — Posted May 24, 2019

How to test your irrigation system for the presence of Phythophthora By Neelam R. Redekar and Jennifer L. Parke Phytophthora is a fungus-like organism — called a water mold — that can infect a wide variety of nursery plant species. One of the ways it can spread is through irrigation water. Depending on size, a […]

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

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

Ag inspections suffered in wake of 9/11

By Curt Kipp — Posted October 17, 2011

If you fly on an airplane, then you have experienced firsthand how U.S. security priorities changed following 9/11. A huge new agency, the Department of Homeland Security, was created and given broad powers to stop terrorist threats. Passengers were treated to body imaging, patdowns and a thicket of regulations governing what they can and can’t […]

Filed Under: Cankers, Plant Diseases, Plant Pests and Diseases Tagged With: Native Plants, Pests and Diseases, Propagation, USDA

Missouri bans walnut products from nine states

By Curt Kipp — Posted April 20, 2010

In an attempt to halt the devastating spread of thousand cankers disease, which afflicts black walnut trees, the state of Missouri has issued an emergency quarantine banning the importation of “walnut products” from nine Western states. According to Missouri officials, “The ban applies to nursery stock, unprocessed lumber, logs, wood chips, mulch and other products […]

Filed Under: Cankers, Plant Diseases, Plant Pests and Diseases Tagged With: Invasive species, Pests and Diseases, Regulations, Trees, Wholesale Nurseries

Florida nursery accused of knowingly shipping infected plants

By Curt Kipp — Posted November 23, 2009

Packer reports that according to Florida officials, a nursery in that state knowingly attempted to sell trees infested with citrus canker out of a quarantined area. The infected trees were detected during an inspection, detained, and sent back to the originating nursery.

Filed Under: Cankers, Plant Diseases, Plant Pests and Diseases Tagged With: Pests and Diseases, Regulations, Trees

NURSERY NEWS

In Memoriam: Melvin John Steffenson

New USDA Census of Hort arriving in mailboxes this month

Oregon Association of Nurseries honors the industry’s best at 2024 Convention

Eason Horticultural Resources is now employee-owned

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

Building trust is key to establishing clientele base for new nurseries

Five owners share their experiences on what it takes to start a nursery businesses

Bailey hires new CFO and chief HR officer

More Nursery News

From the pages of Digger

May 2025: Sustainability Issue

April 2025: The Tree Issue

March 2025: The Perennial Issue

February 2025: The Greenhouse Issue

January 2025: The Retail Issue

More issues of Digger

Pests and Diseases

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

$250,000 shifted to P. austrocedri research

More articles

FARWEST SHOW UPDATES

Sense of excitement prevailed at Farwest as nursery industry ‘Meets the Future’ 

Farwest Show attendees select favorites for the Retailers’ Choice Awards

Starway to Heaven™ Japanese Snowbell wins People’s Choice balloting at Farwest Show New Varieties Showcase

Hopper Bros. wins Best in Show booth award at 2024 Farwest Show   

Starway to Heaven™ Japanese Snowbell wins Judges’ Best in Show at Farwest Show New Varieties Showcase

More Updates from Farwest

The Value of Membership

Meet the leader: Sam Pohlschneider

OAN honors the industry’s best

Oregon Association of Nurseries honors the industry’s best at 2024 Convention

More member stories

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