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You are here: Home / Archives for Pests and Diseases

New Phytophthora pathogen — not P. ramorum — found on two nurseries

By Curt Kipp — Posted August 28, 2024

A soilborne plant pathogen not previously seen in the United States — Phytophthora austrocedri — has been detected at two Oregon nurseries and has infested an unknown number of plants. The detections have prompted an aggressive quarantine of some of the plant material on both operations as growers and authorities strive to identify infested areas and contain the pathogen’s […]

Filed Under: Nursery News, Phytophthora, Plant Pests and Diseases Tagged With: pathogens, Pests and Diseases, Plants, Wholesale Nurseries

Update on flatheaded borer management in specialty tree crops

By Karla Addesso — Posted March 29, 2024

In 2020, a multi-state research project led by Drs. Karla Addesso and Jason Oliver of Tennessee State University was funded by the USDA-Specialty Crop Research Initiative to coordinate research on this pest group.

Filed Under: Borers, Flatheaded Borer, Growing Knowledge, Insects, Plant Pests and Diseases Tagged With: Pests and Diseases

Learning, connecting, engaging

By Silvia Rondon — Posted April 20, 2023

Oregon’s Integrated Pest Management Center serves as an innovative pest management hub for growers Article and photos By Silvia I. Rondon Since the early 1960s, the Oregon Integrated Pest Management (IPM) Center has accumulated a rich history of leading and coordinating multistate research and outreach programs to help a broad audience in the agricultural and […]

Filed Under: Growing Knowledge Tagged With: Digger, Digger magazine, Pests and Diseases, Plants

Boxing out boxwood blight

By Jon Bell — Posted December 27, 2022

Growers must work vigilantly to keep the fungus that causes boxwood blight out of their nurseries Boxwood is one of the most popular landscaping plants around. It’s evergreen and pretty, it provides natural privacy, it’s easy to maintain and it can be shaped into attractive ornamental topiaries. In fact, so popular is boxwood that it’s […]

Filed Under: Blights, Boxwood Blight, Nursery Operations, Plant Diseases, Plant Pests and Diseases Tagged With: boxwood blight, Digger, Digger magazine, Pests and Diseases, Plants

How to catch a thrips

By Lloyd Nackley — Posted December 27, 2022

Rigorous scouting can help manage tip-feeding thrips before they cause irreparable damage By Lloyd Nackley and Melissa Scherr Thrips belong to the insect order Thysanoptera, of which there are several species that are damaging to nursery and ornamental crops. Whether there is only one or many, we call them thrips regardless, just like with other […]

Filed Under: Growing Knowledge Tagged With: Digger, Digger magazine, Pests and Diseases

Space limited for boxwood blight workshop on October 20

By Curt Kipp — Posted September 13, 2022

Five organizations are collaborating on a boxwood health workshop for growers set for 8:30 a.m.–noon Thursday, October 20 at the North Willamette Research and Extension Center, 15210 N.E. Miley Road, Aurora, Oregon. Registration is now open and is limited to 40 people; those interested can sign up online. There is a $15 cost.

Filed Under: Blights, Boxwood Blight, Nursery News, Nursery Operations, Plant Diseases, Plant Pests and Diseases Tagged With: diseases, Oregon State University, pests, Pests and Diseases

A beneficial breath of fresh air

By Jana Lee — Posted June 22, 2022

Testing the use of wintergreen oil to attract beneficials that kill nursery pests By Jana Lee, Victoria Skillman and Katerina Velasco Graham Can minty odors really enhance pest control? When pests feed on a plant, the plant releases odors, one of them being methyl salicylate (MeSA), also known as oil of wintergreen. When MeSA is […]

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

Nostoc: A nursery nemesis

By Luisa Santamaria — Posted May 25, 2022

Exploring novel approaches to long-term, sustainable management, and even use, of cyanobacteria By Luisa Santamaria, Maria Marlin and Katie Gregor One mention of nostoc is likely enough to fill any nursery manager with intense terror and agony. Nostoc, a green jelly-like film growing over gravel or on ground surfaces that are constantly wet, is a […]

Filed Under: Growing Knowledge Tagged With: Digger, Digger magazine, Nursery operations, Oregon State University, OSU, Pests and Diseases

Green practices and silver bullets

By Erica Browne Grivas — Posted May 25, 2022

Integrated pest management, or IPM, has continued to improve and deliver benefits for growers While integrated pest management (IPM) has been an accepted best practice for growers since its introduction in the 1960s, it hasn’t always been growers’ first choice when looking for a fast, efficient answer to their crop dilemmas. The field of study […]

Filed Under: Azalea Lace Bugs, Fusarium Root Rot, Insects, Nursery Operations, Plant Pests and Diseases, Root Rots, Spotted Wing Drosophila Tagged With: Digger, Digger magazine, ipm, Pests and Diseases

Keeping lawns healthy

By Alec Kowalewski — Posted April 20, 2022

Research points to certain practices for minimizing invasive annual bluegrass By Alec Kowalewski, Clint Mattox, and Alyssa Cain Desirable turfgrass species in western Oregon include, but are not limited to, perennial ryegrass and tall fescue. Perennial ryegrass will produce a dense, dark green lawn when regularly mowed, irrigated, and fertilized. Tall fescue, on the other […]

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

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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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