Source: AUBURN UNIVERSITY submitted to NRP
CULTIVAR EVALUATIONS AND CULTURAL PRACTICES FOR PECANS
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
Reporting Frequency
Annual
Accession No.
0222932
Grant No.
(N/A)
Cumulative Award Amt.
(N/A)
Proposal No.
(N/A)
Multistate No.
(N/A)
Project Start Date
Oct 1, 2010
Project End Date
Oct 1, 2015
Grant Year
(N/A)
Program Code
[(N/A)]- (N/A)
Recipient Organization
AUBURN UNIVERSITY
108 M. WHITE SMITH HALL
AUBURN,AL 36849
Performing Department
Horticulture
Non Technical Summary
Pecan is a major horticultural crop in the United States, with crop value in 2009 of $397 million (USDA, 2009). Alabama has over 22,000 acres planted in pecans (USDA, 2002). Alabama is well-suited to pecan production if suitable cultivars with excellent disease resistance can be found. Alabama has a strong pecan growers association that would cooperate in pinpointing grower problems, provide strong feedback on results, and support university research. Auburn University possesses several pecan orchards and has ongoing long-term trials in place, including the largest collection of disease resistant pecan selections in the world at the E.V. Smith Research Center. Pecan scab is a major limiting factor in the commercial production of pecans and it is especially severe in the humid climate of the Southeast. In Georgia alone, losses attributed to pecan scab exceeded $50 million for the five-year period of 1990 through 1994 (Hadden, 1990; Bertrand 1991, 1992, 1993, 1994). Pecan ranks third as a market for fungicide in the U.S., following peanuts and deciduous fruit, and pecan scab is the primary target. Additionally the size of the trees (up to 100 ft. in height) requires the use of large expensive energy consumptive and very conspicuous sprayers creating substantial drift, increasing concerns of people living near orchards regarding pesticide use. Selection and testing of new cultivars is a continuing need in research. As the cultivars become available they must be tested in each growing area for accurate recommendations to be made to growers. By systematically identifying grower problems and researching appropriate solutions this project can substantially contribute to the improvement of pecan production in the areas growers most need help. Specific contributions to science I hope to make from research done by this project include 1) reduction of pesticide use in pecan orchards; 2) improved profitability of orchards due to reduced input costs and improved production; and 3) increase viability of pecan as a home orchard landscape tree due to improved pest resistance.
Animal Health Component
100%
Research Effort Categories
Basic
(N/A)
Applied
100%
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
2031211108110%
2041211108110%
2121211108110%
2051211102060%
6011211102010%
Goals / Objectives
Recommend 2 new cultivars for planting in Alabama. Evaluate approximately 600 selections received from USDA, Georgia, and various other locations for scab resistance. Collect yield, quality, and growth data from ongoing experiments. Initiate new experiment on sulfur. Initiate new experiment on boron plus Dimilin. Eliminate selections and introduce new candidates. Continue collection of data and evaluation. Publish paper on boron, and another on new selections that were recommended. Establish new trials at E.V. Smith and Fairhope through elimination of poor performing clones and replacement with new ones. Eliminate selections and introduce new candidates. Continue collection of data and evaluation. Publish results from low input plantings at EV Smith and at Fairhope. Eliminate selections and introduce new candidates. Continue collection of data and evaluation. Release two cultivars. Eliminate selections and introduce new candidates. Continue collection of data and evaluation. Initiate new cultural experiments as warranted. By systematically identifying grower problems and researching appropriate solutions this project can substantially contribute to the improvement of pecan production in the areas growers most need help. Specific contributions to science I hope to make from research done by this project include 1) reduction of pesticide use in pecan orchards; 2) improved profitability of orchards due to reduced input costs and improved production; and 3) increase viability of pecan as a home orchard landscape tree due to improved pest resistance. OBJECTIVES: 1. Identify and evaluate pecan clones suitable for production in Alabama and the Southeast. 2. Conduct research on pecan management designed to improve profitability for growers. Experiments will involve fertility, dealing with overcrowding, orchard floor management, and alleviating alternate bearing.
Project Methods
Preliminary screening Graft wood will be collected in February from promising clones. In April, existing trees at the E.V. Smith Research Center will be grafted to the test selections. There will be six single tree replications for each clone in a completely randomized design. Trees will be evaluated for scab, foliage condition, percent foliage retention, other pests as warranted, and for nut size, harvest date, and quality. Most clones will be expected to fail this screening and the trees will be reused for further evaluations by cutting off the tops and regrafting. Test plantings Clones passing the preliminary screening will be further evaluated under either low input conditions or high input conditions as warranted by traits expressed in the preliminary evaluations. Testing sites will be at the E.V. Smith Research Center, the Gulf Coast substation, the Tennessee Valley Research and Extension Center in Belle Mina, the Sand Mountain Research and Extension Center at Crossville, and at various grower locations. Clones competitive with existing cultivars will ultimately be released and recommended. Cultural experiments A number of follow-up experiments are in progress or planned regarding use of late-season fertilizer applications to reduce alternate bearing. Most will be done at grower locations, to best simulate grower conditions. An experiment will be conducted to address difficulty in maintaining sufficient sulfur levels in pecans. Another will address effects of Dimilin plus boron on fruit retention. An experiment comparing various timings of fertilizer application with and without presence of clover will be conducted on bearing Cape Fear trees at Byrds Riverbend farm near Lowndesboro. Several experiments will be conducted using a combination of practices designed to alleviate alternate bearing. Practices will include use of late-season fertilizer, application of systemic insecticides in on-years, mechanical crop thinning, and selective tree removal.

Progress 10/01/10 to 10/01/15

Outputs
Target Audience:Commercial and home pecan growers. Changes/Problems: Nothing Reported What opportunities for training and professional development has the project provided?Multiple training field days and grower meetings were hosted and attended during this project. Events included Georgia Pecan Growers' Fall Filed Day, Alabama Pecan Growers annual meetings, Southeastern, Western, Alabama, Georgia, Tri-State (LA, MS, AR), and Texas Pecan Growers Association conventions and Alabama and Georgia Pecan Growers tours. PI-Goff served on the National Pecan and Hickory Germplasm Committee, as an advisor to the AL Pecan Growers, and as an advisor to the National Pecan Growers Council. How have the results been disseminated to communities of interest?Three refereed journal articles and 15 trade journal articles were published during this project period reaching both pecan growers and the scientific community. In addition, multiple grower and scientific meetings were attended and results were presented. What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? Former PI-Goff represented the US pecan industry on a pecan promotional tour to Shanghai and served on the National Pecan and Hickory Gerplasm Committee. As a result, pecan markets were expanded in China which led to record pecan sales in Alabama during this project period. Cultivar recommendations were made to commercial and home pecan growers in Alabama and the southeast. Approximately 2000 commercial pecan growers were made aware of cultivar recommendations through this project. One new pecan cultivar named 'Eclipse' was released. Three refereed journal articles and 15 trade journal articles were published during this project period. Publications addressed topics including novel, improved pecan fertilzation practices, improved pest scouting techniques, improved pecan marketability to international markets, improved budding practices, pecan hedging as an improved cultural practice, improved pecan thinning practices, improved herbicide application methods, and improved pecan scab control practices. An ongoing organic pecan project, funded by NIFA, was initiated. A new phosphorus fertilization and irrigation project was initiated by new PI-Wells to improve nut yield, nut quality, and reduce negative environmental impacts of phosphorus from pecan orchards.

Publications


    Progress 10/01/13 to 09/30/14

    Outputs
    Target Audience: The target audiences reached as a result of this project are pecan growers and homeowners in Alabama. Alabama pecan growers typically manage small, low-input farms. Information regarding cultivar selections for low-input orchards is of great value to both of these groups. In addition, the pecan research community has been reached through this project. Changes/Problems: Bill Goff retired on December 31, 2013. I was hired May 1, 2014 and have assumed responsibility for this project. The direction of this project will likely change in September 2015 to focus more broadly on production of other specialty crops in Alabama, including pecans. What opportunities for training and professional development has the project provided? Cultural practices, including fungicide application methods and pruning methods, and cultivar evaluations were discussed and demonstrated at the Alabama Pecan Grower's Association annual meeting. How have the results been disseminated to communities of interest? Two articles were published in referred academic journals. Cultivar selection and cultural practice information was disseminated at numerous meetings described above. What do you plan to do during the next reporting period to accomplish the goals? New experiments will be initiated to investigate effects of banded applications of phosphorus-containing fertilizers on pecan tree growth, nut yield, nut quality, and nutrient uptake and assimilation. A new experiment will be initiated to determine effects of novel fertilization practices on pecan root growth and pecan tree stability. Cultivar evaluations for both low- and high-input orchards will continue. Evalution of organic weed control and scab control methods will continue.

    Impacts
    What was accomplished under these goals? Cultivar selections for both low- and high-input orchards continued to be evaluated for pecan scab resistance, nut yield, and nut quality at E.V. Smith Research Center and Gulf Coast Research and Extension Center. In coordintation with the University of Florida, the University of Georgia, and the USDA, an organic pecan production experiment was initiated at Gulf Coast Research and Extension Center. Organic compliant weed and pecan scab control methods are being evaluated.

    Publications

    • Type: Journal Articles Status: Published Year Published: 2014 Citation: Smith, M.W. and W.D. Goff. Pecan nut suture splits are positively related to kernel moisture concentration and solar radiant exposure. HortTech. 24(2):238-240
    • Type: Journal Articles Status: Published Year Published: 2014 Citation: Smith, M.W. and W.D. Goff. Patch budding pecan: girdling, tipping, age, and size of budwood and rootstock for budding; girdling, 2,3,5-triodobenzoic acid and 6-benzylaminopuring for bud forcing. 24(5):512-518.


    Progress 01/01/13 to 09/30/13

    Outputs
    Target Audience: Target audience is commercial and home pecan growers. Changes/Problems: Change will occur as a result of new leadership following Bill Goff's retirement effective Dec 31, 2013. What opportunities for training and professional development has the project provided? We hosted the Georgia Pecan Growers Fall Field Day, where growers observed 8 experiements in progress, and learned how our research efforts could be practically used on their farms. Two area pecan meetings were conducted. Events I participated in included the Southeastern, Western, Alabama, Georgia, Tri-State (LA, MS, AR), and Texas Pecan Growers Associations Conventions and the Alabama and Georgia Pecan Growers tours. Services included serving on the National Pecan and Hickory Germplasm Committee, as advisor to the board othe AL Pecan Growers and as advisor to the National Pecan Growers Council. I also serve as an advisor to a $1.2 million grant project on health benefits of pecans. Products included providing performance information about several advanced pecan selections which have promise in the Southeast. How have the results been disseminated to communities of interest? Through meetings and events and publications listed above. What do you plan to do during the next reporting period to accomplish the goals? Leadership in the project will change, as Bill Goff retired Dec. 31, 2013, and successor will determine plans to accomplish goals.

    Impacts
    What was accomplished under these goals? Promotional/marketing efforts in which I am involved have contributed to progression in sales of pecans to China.Approximately 2000 commercial pecan growers were made aware of our research through publications and meetings. Changes in cultivar recommendations resulted following our trials, and pecan growers and homeowners were able to plant cultivars with good pest resistance requiring fewer sprays. Ongoing experiments were conducted at the following locations - E. V. Smith Research Center: Low-input cultivar trial, high-input cultivar trial, scab evaluation. Fairhope: Evaluation of low input cultivars, evaluation of high input cultivars. Grower locations: Cultivar evaluations, an experiment evaluating hedging and tree removal to address overcrowding, an experiment on banding P, and an orchard establishment experiment evaluating various high density spacings. We added to our collection of the scab resistant pecan selections in central and south Alabama. Dissemination occurred through numerous meetings and tours mentioned above and through industry publications listed below.

    Publications

    • Type: Other Status: Published Year Published: 2013 Citation: Goff, Bill. 2013. The pecan cultivar trial at Friendship Pecans. Pecan South 46 (48): 4, 18, 22. Goff, Bill. 2013. Mechanical crop thinning in the West. Pecan South 46 (4): 4, 10. Goff, Bill. 2013. The pecan cultivar trial at Friendship Pecans. Pecan South 46 (48): 4, 18, 22.


    Progress 01/01/12 to 12/31/12

    Outputs
    OUTPUTS: Ongoing experiments were conducted at the following locations - E. V. Smith Research Center: Low-input cultivar trial, high-input cultivar trial, scab evaluation. Fairhope: Evaluation of low input cultivars, evaluation of high input cultivars. Grower locations: Cultivar evaluations, an experiment evaluating hedging and tree removal to address overcrowding, an experiment on banding P, and an orchard establishment experiment evaluating various high density spacings. Events I participated in included the Southeastern, Western, Alabama, Georgia, Tri-State (LA, MS, AR), South Carolina, Oklahoma, and Texas Pecan Growers Associations and the Alabama and Georgia Pecan Growers tours. Services included serving on the National Pecan and Hickory Germplasm Committee, as advisor to the board of the AL Pecan Growers and as advisor to the National Pecan Growers Council. I also serve as an advisor to a $1.2 million grant project on health benefits of pecans. Products included providing performance information about several advanced pecan selections which have promise in the Southeast. We added to our collection of the scab resistant pecan selections in central and south Alabama. Dissemination occurred through numerous meetings and tours mentioned above and through industry publications listed below. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Target audience is commercial and home pecan growers. PROJECT MODIFICATIONS: Not relevant to this project. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Commercial and home pecan growers. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Commercial and home pecan growers. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

    Impacts
    Promotional/marketing efforts in which I am involved have contributed to progression in sales of pecans to China. Efforts of our pecan program contributed to the record value in 2011 of Alabama pecans of $31,650,000. Approximately 2000 commercial pecan growers were made aware of our research through publications and meetings. Changes in cultivar recommendations resulted following our trials, and pecan growers and homeowners were able to plant cultivars with good pest resistance requiring fewer sprays.

    Publications

    • Michael W. Smith, Charles T. Rohla, and William D. Goff. 2012. Pecan leaf elemental sufficiency ranges and fertilizer recommendations. HortTechnology 22(5): 594-599. Goff, Bill. 2012. Planting southeastern orchards for the export market. Pecan South 45 (10): 4, 10-11. Goff, Bill, and Mike Smith. 2012. Major changes in how to fertilize pecan trees. Pecan South 45 (7): 4, 18-20. Goff, Bill. 2012. Custom scouting: valuable resource for pecan growers. Pecan South 45 (4): 6-7, 10. Goff, Bill. 2012. Purchase, plant, or renovate. Pecan South 45 (1): 6-7, 10.


    Progress 01/01/11 to 12/31/11

    Outputs
    OUTPUTS: Ongoing experiments were conducted at the following locations - E. V. Smith Research Center: Low-input cultivar trial, high-input cultivar trial, scab evaluation. Fairhope: Evaluation of low input cultivars, evaluation of high input cultivars. Effescts of Dimilin and boron on yield and quality. Grower locations: Cultivar evaluations, effect of sulfur banding.New exerimets initiated in 2011 included a pecan cultivar trial, an experiment evaluating hedging and tree removal to address overcrowding, an experiment on banding P, and an orchard establishment experiment evaluating various high density spacings. Events I participated in included the Southeastern, Alabama, Florida, Georgia, Tri-State (LA, MS, AR), Northern, Oklahoma, and Texas Pecan Growers Associations and the Alabama and Georgia Pecan Growers tours. Services included representing the industry on a pecan promotion trip to Toronto, serving on the National Pecan and Hickory Germplasm Committee, and serving as advisor to the National Pecan Growers Council. I also serve as an advisor to a $1.2 million grant project on health benefits of pecans. Products included assisting with the patent release of a new cultivar, Eclipse., and providing performance information about several advanced pecan selections which have promise in the Southeast. We added to our collection of the scab resistant pecan selections in central and south Alabama. Dissemination occurred through numerous meetings and tours mentioned above and through industry publications listed below. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Target audience is commercial and home pecan growers. PROJECT MODIFICATIONS: Not relevant to this project. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Commercial and home pecan growers. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.

    Impacts
    Promotional/marketing efforts in which I am involved have contributed to progression in in sales of pecans to China from 2.2, 9.3, 26.3, 43.7, 89 and 62 million lbs. for 2005 through 2010, respectively. This market expansion has helped the price of improved pecans to reach a record price of $2.33 per pound in 2010, and a yet undetermined new record price in 2011. Approximately 2000 commercial pecan growers were made aware of our research through publications and meetings. Changes in cultivar recommendations resulted following our trials, and pecan growers and homeowners were able to plant cultivars with good pest resistance requiring fewer sprays.

    Publications

    • Goff, Bill. 2011. How much does it cost to send pecans to China Pecan South 44 (10): 6-7, 10. Goff, Bill. 2011. We cant predict which pecan cultivars will scab, or can we Pecan South 44 (4): 4-5. Goff, Bill, and Mike Patterson. 2011. Apply herbicides on soil. Pecan South 44 (1): 6-7.


    Progress 01/01/10 to 12/31/10

    Outputs
    OUTPUTS: Ongoing experiments were conducted at the following locations - E. V. Smith Research Center: Low-input cultivar trial, high-input cultivar trial, scab evaluation. Fairhope: Evaluation of low input cultivars, evaluation of high input cultivars. Effescts of Dimilin and boron on yield and quality. Grower locations: Cultivar evaluations,improvements in pecan propagation methods, effect of sulfur banding. Events included presentations at the Alabama, Louisiana, Northern, and Texas Pecan Growers Associations meetings, Pecan Producers of Louisiana, and the Alabama Pecan Growers summer tour. Services included representing the industry on a pecan promotion in Shanghai, ongoing consulting to Honeysuckle Pecan Company, serving on the National Pecan and Hickory Germplasm Committee, and short-term consulting with various other commercial pecan growers. Products included assisting with the patent release of a new cultivar, Eclipse., and providing performance information about several advanced pecan selections which have promise in the Southeast. We added to our collection of the scab resistant pecan selections in central and south Alabama. Dissemination occurred through numerous meetings and tours mentioned above and through industry publications listed below. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Target audience is commercial and home pecan growers. PROJECT MODIFICATIONS: Not relevant to this project.

    Impacts
    Promotional/marketing efforts in which I am involved have contributed to progression in in sales of pecans to China from 2.2, 9.3, 26.3, 43.7 and 88 million lbs. for 2005 through 2009. This market expansion has helped the price of improved pecans to reach a record price of $2.33 per pound in 2010. Approximately 2000 commercial pecan growers were made aware of our research through publications and meetings. Changes in cultivar recommendations resulted following our trials, and pecan growers and homeowners were able to plant cultivars with good pest resistance requiring fewer sprays.

    Publications

    • Goff, Bill. 2010. Observations on problems with quality and shuck split in the Southeast. The Delta Pecan Grower 4: 2-3. Goff, Bill. 2010. Scab: pecan enemy number one. Pecan South 43 (1): 7-8. Goff, Bill. 2010. Problems with quality and shuck split in the Southeast. Pecan South 43 (10): 4-5. Goff, Bill. 2010. Challenging commonly-held scab control practices. Pecan South 43 (7): 7-8 . Goff, Bill. 2010. A glimpse at the pecan processing industry in China. Pecan Grower 22 (2):58-63. Goff, Bill. 2010. After youve thinned your orchard, what next Pecan Grower 22 (2):44-47.