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Horticultural Spray Oils Reviewed: March 2023 Dr. Doug Walsh, IPM Coordinator, Washington State University Dr. Frank Zalom, IPM Program Director, University of California Dr. Gary Grove, Plant Pathologist, Washington State University Adapted by Jay W. Psc ...

Oregon Quarantines Reviewed: March 2023 The following diseases are quarantined against shipment into and within Oregon. Oregon also has several control areas designed to protect specific counties or designated areas from diseases and pests of regulatory c ...

Plants Susceptible to Phytophthora Diseases Reviewed: March 2023 Plants in the PNW Susceptible to Phytophthora Diseases Genus Common Name Abies * true fir Alnus alder Araucaria monkey puzzle Arbutus madrone Arctostaphylos kinnikinnick Brassica cabbage Bux ...

Diseases Caused by Pseudomonas syringae Reviewed: March 2023 L.W. Moore (deceased), Bacteriologist and Plant Pathologist, OSU J.W. Pscheidt, Extension Plant Pathology Specialist, OSU Adapted from L.W. Moore. 1988. Pseudomonas syringae: disease and ice nuc ...

Plant Viruses Reviewed: March 2023 ...

APHIS List of Regulated Hosts and Plants Proven or Associated with Phytophthora ramorum Reviewed: March 2023 Proven Hosts Regulated for Phytophthora ramorum Regulated plants are those adapted from other regulated lists or were added upon completion, docum ...

Plants Resistant or Susceptible to Armillaria Root Rot Reviewed: March 2023 Plants Resistant or Susceptible to Armillaria Root Rot Trees Resistant Susceptible incense cedar pines (MI) larch arborvitae (HI) Scots pine (MI) cedar (HI) Smoketree (LI Douglas- ...

Impatiens Necrotic Spot: New Name, Same Threat Reviewed: March 2023 J.W. Pscheidt, Extension Plant Pathology Specialist, OSU J. DeAngelis, Professor emeritus, College of Agriculture Administration, OSU Tomato spotted wilt virus (TSWV) is so named because ...

Virus Certification Program for Fruit and Ornamental Trees Reviewed: March 2023 Dipak Poudyal, Plant Pathologist, Oregon Department of Agriculture Nurseries grow virus-free plants not just for the export market, but for the domestic market as well. Produc ...

Care and Maintenance of Wood Shingle and Shake Roofs Reviewed: March 2023 Jeff Morrell, OSU, University Distinguished Professor, College of Forestry, Wood Science and Engineering. This information, updated and expanded with color images, is located: https ...