Source: CLEMSON UNIVERSITY submitted to
SOLUTIONS TO THE ARMILLARIA ROOT ROT THREAT AFFECTING THE U.S. STONE FRUIT INDUSTRY
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
Reporting Frequency
Annual
Accession No.
1016406
Grant No.
2018-51181-28378
Cumulative Award Amt.
$49,949.00
Proposal No.
2018-03310
Multistate No.
(N/A)
Project Start Date
Sep 1, 2018
Project End Date
Aug 3, 2020
Grant Year
2018
Program Code
[SCRI]- Specialty Crop Research Initiative
Recipient Organization
CLEMSON UNIVERSITY
(N/A)
CLEMSON,SC 29634
Performing Department
Plant and Environmental Sci
Non Technical Summary
Armillaria root rot (ARR) is a serious threat to many economically important stone fruit and nut crops throughout the United States. The causal soil-borne fungi, Armillaria species, infects the root system, typically killing trees when they are reaching their maximum productivity. Not only do these orchards become unprofitable, but the infected land is rendered unsuitable for continued production. There are neither practices to eradicate the pathogen from infected trees nor therapeutic methods that counteract the reduced productivity and tree death. Lack of a screening assay is a bottleneck for rootstock research as current screening protocols can take 5-8 years to evaluate tree death in infected orchards. Research of resistant rootstocks is fragmented in different labs and despite all of the past or present efforts solution to the ARR problem is still elusive due partially to individual or localized efforts. This planning grant will assemble multi-disciplinary, multi-crop, multi-institutional team of researchers and representatives of the affected specialty crop industries united in finding the solution to the ARR replant disease. ARR threat can only be addressed with a systems-based and trans-disciplinary approach via research in plant breeding, genetics and genomics to improve environmental responses and tolerances to ARR as well as to develop disease management to improve production efficiency in stone fruits until the permanent solution is found. The problem is grave and the time to act is now. Planning grant is a stepping stone in the right direction to resolve this critical replant issue
Animal Health Component
40%
Research Effort Categories
Basic
30%
Applied
40%
Developmental
30%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
2121119116030%
2011119104030%
2021119108120%
2051119102010%
9032499302010%
Goals / Objectives
Major goal of the project is to assemble a national, interdisciplinary team that will identify gaps in the research, assess grower needs, and develop and coordinate achievable objectives that apply to all Prunus crops and all Armillaria species.The planning grant goal is to develop a comprehensive USDA SCRI Coordinated Agricultural Project/Standard Research and Extension Proposal (CAP/SREP), which directly addresses this goal by identifying and filling the gaps that exist between currently funded research and incorporating grower needs. Collectively this will address our long term goal of finding a permanent solution for ARR in Prunus, and this effort will benefit crops outside the scope of this proposal (e.g., walnut, grape, rose). The specific objectives of this project are to: Assemble a national, interdisciplinary, multi-institutional team of researchers,Identify gaps in current Armillaria root rot (ARR) research and potential collaborations to fill such gaps,Include stakeholders on the project team, to ensure rootstock acceptance,Identify and align common goals to develop ARR resistance,Integrate pathogen and plant collections, and knowledge from preliminary and other unpublished research, into a coordinated plan for development of a CAP/SREP proposal
Project Methods
To achieve project goals a3-day meeting will be organized in Clemson, SC with the following itinerary:Day 1 - Compileinformation on thestate of the ARR problem, progress on research on rootstock development, overview of the screening techniques, new sources of resistance and genomic resources. Teams addressing each aspect of ARR problem/solution will continue discussion in break out sessions of phenotyping; genomics/genotyping and horticulture/extension groups. Reports form each break out groups will be collated and discussed over a working dinner.Day 2 - Participants will travel to the area affected with ARR in Ridge Spring, SC to meet with growers from SC and GA and see effects of ARR in the field. Lunch will be orgznied at the extension offices of Edgefield county. After lunch summary of Day 1 will be presented to the growers followed by an open discussion with growers to identify their short and long term needs. Objectives of the future SCRI grant will be defined over a working dinner.Day 3 - Summary of the Day 2 presented to the participants and round table discussions organized to integrate plans form each team and define obejctives for preparation of SCRI SREP/CAP grant. Objectives of the future grant proposal will be defined and a coordinator of each obejctive will be designated. Objective specific budget and proposal development timeline will be established before meeting is adjourned.

Progress 09/01/18 to 08/31/20

Outputs
Target Audience:Target audience are stone fruitgrowers, especially peach, almond and cherry, in southeast U.S., MI and CA, commodity groups and allied scientist. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest? Nothing Reported What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? A national, interdisciplinary, multi-institutional team of researchers (33) and commodity representatives (11) met in Clemson, SC in September 2018, and during a three-day workshop identified the gaps in current Armillaria root rot (ARR) knowledge. The team visited an ARR affected orchard in SC and discussed the short-term and long-term solutions to the problem with growers during a half day workshop at the Edgefield, SC extension county office. We have also organized two round table discussions during the Southern Regional Fruit and Vegetable Conference in Savannah GA in January 2019 and 2020 with peach growers attending the conference. Drs. Iezzoni (tart cherry breeder form MI) and Schnabel (pathologist from SC) attended the Michigan cherry grower's conference in February 2019 and 2020 and presented above ground root collar excavation as the short-term horticultural strategy to extend the orchard life on ARR affected sites. In response to the feedback from and in collaboration with stakeholders, the assembled team designed the strategy to address short- and long-term solutions to ARR replant problem and developed a Specialty Crop Research Initiative Standard Research and Extension Proposal that was invited for a full proposal submission to the USDA-NIFA in spring 2019. After not being selected for funding we met again with stakeholders during the regional growers' meetings to discuss reviewers' comments, addressed the negative issues identified by the scientific review panel and the re-submitted proposal was recommended for funding in 2020.

Publications


    Progress 09/01/18 to 08/03/20

    Outputs
    Target Audience:Target audience are stone fruitgrowers, especially peach, almond and cherry, in southeast U.S., MI and CA, commodity groups and allied scientist. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest? Nothing Reported What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

    Impacts
    What was accomplished under these goals? A national, interdisciplinary, multi-institutional team of researchers (33) and commodity representatives (11) met in Clemson, SC in September 2018, and during a three-day workshop identified the gaps in current Armillaria root rot (ARR) knowledge. The team visited an ARR affected orchard in SC and discussed the short-term and long-term solutions to the problem with growers during a half day workshop at the Edgefield, SC extension county office. We have also organized two round table discussions during the Southern Regional Fruit and Vegetable Conference in Savannah GA in January 2019 and 2020 with peach growers attending the conference. Drs. Iezzoni (tart cherry breeder form MI) and Schnabel (pathologist from SC) attended the Michigan cherry grower's conference in February 2019 and 2020 and presented above ground root collar excavation as the short-term horticultural strategy to extend the orchard life on ARR affected sites. In response to the feedback from and in collaboration with stakeholders, the assembled team designed the strategy to address short- and long-term solutions to ARR replant problem and developed a Specialty Crop Research Initiative Standard Research and Extension Proposal that was invited for a full proposal submission to the USDA-NIFA in spring 2019. After not being selected for funding we met again with stakeholders during the regional growers' meetings to discuss reviewers' comments, addressed the negative issues identified by the scientific review panel and the re-submitted proposal was recommended for funding in 2020.

    Publications


      Progress 09/01/18 to 08/31/19

      Outputs
      Target Audience:Target audiences reached by our efforts wereallied scientists from academia and the USDA, stone fruit growers and industry representative organizations(CA Almond Board, MI Cherry Commission, National Peach Council, SC and GA Peach Councils), as well as nurseries (Sierra Gold Nurseries, Fowler Nurseries and Cumberland Valley Nursery). Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest?Round table discussions, regional and national growers and scientific meetings were used to disseminate the summary of the workshop organized in Clemson. What do you plan to do during the next reporting period to accomplish the goals?The proposalsubmitted to the NIFA-SCRI funding opportunity was ranked medium priority despite the urgency for the stakeholders that this is the problem in which they need asolution. We plan on revising the proposal and addressing scientific review comments with the helpof the stakeholders and professional project development service. We will use round table discussionsand personal visits to the affected regions to ensure that the voice/opinion andparticipation of all affected parties is secured. We will re-submit a stakeholder relevancy statement to USDA-NIFA-SCRI with the hope that it will be invited for full proposal submission.

      Impacts
      What was accomplished under these goals? We have succesfully brought to the table stone fruitindustry (growers and nurseries) and researchers across the U.S. from regions affected by Armillaria root rot to discuss the present stateof the research and what needs to be done. The three-day workshop in Clemson and round table discussion in Savannah GA were organzied to gather information on what are the major obstacles to providing solutions for this replant problem. Engagement of both research community and stakeholders resulted in the development of objectives for a research proposal to advance the knowledge on Armillaria root rot and to test/provide short and medium term solutions to the industry. The need for accurate socio-economic assessment of the impact of Armillaria root rot to the industry was evident. Summary of the state of the Armillaria research and short and long term needs of the stone fruit industry were developed and shared with commodity boards and wider audiences as presentations at the conferences and or local growers meetings. We have assembled a national, interdisciplinary, multi-institutional team of researchers to:identify gaps in current Armillaria root rot (ARR) research and potential collaborations to fill such gaps;involved stakeholders on the project team, to ensure rootstock acceptance; identifiedand aligned common goals to develop ARR resistance; and integrated pathogen and plant collections, and provided knowledge from preliminary and other unpublished research into an SREP proposal that was submitted to the NIFA-SCRI funding opportunity.

      Publications