Control of Eastern Filbert Blight

Project Overview

Project Type: Research and Education
Funds awarded in 2000: $81,477.00
Projected End Date: 12/31/2003
Matching Non-Federal Funds: $43,870.00
Region: Western
State: Oregon
Principal Investigator:
Jay Pscheidt
Department of Botany and Plant Pathology

Annual Reports


  • Nuts: hazelnuts
  • Additional Plants: ornamentals


  • Crop Production: biological inoculants, application rate management
  • Education and Training: decision support system, demonstration, extension, on-farm/ranch research
  • Farm Business Management: risk management
  • Pest Management: biological control, biorational pesticides, botanical pesticides, chemical control, cultural control, field monitoring/scouting, genetic resistance, integrated pest management, prevention, sanitation, weather monitoring
  • Soil Management: earthworms


    The management of eastern filbert blight (EFB) using DMI or strobilurin fungicides alone or in combination was effective. A model based on branch wetness, called GrammaCast, used fewer applications of fungicide and was as good as or worse than the standard program. Late fall or spring injections of fungicides will not be of benefit for the management of EFB. There were 3 Collembola, 7 mites and 13 fungi identified in association with EFB stroma. All research and extension projects were communicated to the hazelnut industry in a wide variety of ways.

    Project objectives:

    1. In cooperation with hazelnut growers, establish field and greenhouse trials designed to evaluate new chemicals for effectiveness against EFB.

    2. Develop and evaluate an easy-to-use ascospore forecasting model in cooperation with hazelnut growers to help determine the need for late spring applications of fungicides.

    3. Evaluate tree injection technology for the therapeutic treatment of trees already infected with EFB.

    4. Document and describe organisms associated with EFB cankers. Evaluate the potential of various organisms for biological control of EFB.

    5. Disseminate results to the hazelnut industry in a variety of user friendly formats.

    Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture or SARE.