Joshua D Sherman

Interests

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Courses

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Scholarly Contributions

Chapters

• Sherman, J. D. (2017). Nut Trees (100%). In University of Arizona Master Gardener Manual.
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  12 pp.

Journals/Publications

• Heerema, R. J., VanLeeuwen, D., Potter, M. T., Sherman, J. D., Comeau, M. J., & Walworth, J. L. (2016). Leaf Photosynthesis of Immature 'Wichita' pecan trees is Improved by Soil-Application of Zinc-EDTA (20%). American Society for Horticultural Science, 35.
• Moral, J. M., Papagelis, A., Lichtemberg, P., Sherman, J. D., & Michailides, T. (2018). Didymella glomerata causing leaf blight on pistachio (20%). European Journal of Plant Pathology, 151(4), 1095-1099. doi:https://doi.org/10.1007/s10658-018-1422-y
• Heerema, R. J., VanLeeuwen, D., Potter, M. T., Sherman, J. D., Comeau, M. J., & Walworth, J. L. (2017). Leaf Photosynthesis of Immature 'Wichita' pecan trees is Improved by Soil-Application of Zinc-EDTA (20%). American Society for Horticultural Science, 142(1), pp. 27-35.
• Hilton, A., Jo, Y., Cervantes, K., Stamler, R., Randall, J., French, J., Heerema, R., Goldberg, N., Sherman, J. D., Wang, X., & Grauke, L. (2017). First Report of Pecan Bacterial Leaf Scorch Caused by Xylella fastidiosa in Pecan (Carya illinoinensis) in Arizona, New Mexico, California, and Texas (30%). Plant Disease, 101(11), 1.
• Sherman, J. D., Heerema, R. J., VanLeeuwen, D., & St.Hilaire, R. (2017). *Optimal Manganese Nutrition Increases Photosynthesis of Immature Pecan Trees (100%). HortScience, 52(4), 6. doi:10.21273/HORTSCI11252-16
• Sherman, J. D. (2015). Bacterial leaf scorch is identified in Arizona for first time (100%). Pecan South.

Presentations

• Sherman, J. D. (2018, August/Summer). Root Rot: A Southwest Killer (100%). Arizona Pecan Grower's Association Annual Conference. Tucson: Arizona Pecan Grower's Association.
• Sherman, J. D. (2018, February/Spring). Fruit & Nut Trees: Common Fungal / Bacterial Diseases, Diagnosis Guide (100%). Farm / Home / Ranch Day. Safford, Arizona: Graham County Cooperative Extension.
• Sherman, J. D. (2018, February/Spring). Root Rot of Perennial Crops: Identification Techniques and Control (100%). Southeast Arizona Ag Day. Willcox, Arizona: Southeast Arizona Ag Day Committee.
• Sherman, J. D. (2018, July/Summer). Nut Tree Update: Pests, Diseases, & Diagnosis Guide (100%). USDA Risk Management Agency Grower Meeting. Elfrida, Arizona: USDA Risk Management Agency.
• Sherman, J. D. (2018, March/Spring). Trace Yet Substantial: Essential Micronutrients of Pecan (100%). Western Pecan Growers Association Annual Conference. Las Cruces, New Mexico: Western Pecan Growers Association.
• Sherman, J. D. (2018, October/Fall). Grafting & Budding: Propagation Techniques for Pecan (100%). New Mexico State University Pecan Growers Short Course. Las Cruces, New Mexico: New Mexico State University.
• Sherman, J. D. (2018, October/Fall). PO Root Rot in Pecan (100%). New Mexico State University Pecan Growers Short Course. Las Cruces, New Mexico: New Mexico State University.
• Sherman, J. D. (2018, October/Fall). The Majestic Pecan: Introduction & Industry Overview (100%). New Mexico State University Pecan Growers Short Course. Las Cruces, New Mexico: New Mexico State University.
• Sherman, J. D. (2018, October/Fall). Training the Young Pecan Tree: Training for Productive Establishment (100%). New Mexico State University Pecan Growers Short Course. Las Cruces, New Mexico: New Mexico State University.
• Sherman, J. D. (2017, February). Macronutrients: Function and Disease (100%). 38th Annual Southeast Arizona Ag Day. Willcox, AZ.
• Sherman, J. D. (2017, June). Berry Nutty (100%). 26th Annual Desert Horticulture Conference. Tucson, AZ: University of Arizona.
• Sherman, J. D. (2017, September). The Majestic Pecan (100%). Arizona Community Tree Council Annual Conference. Prescott, AZ: Arizona Community Tree Council, Inc..
• Sherman, J. D. (2016, February). Nut Trees and Vines: Insects, Disease, Nutrition (100%). Southeastern Arizona Ag Day & Trade Show. Willcox Community Center, Willcox, AZ: Southeast Arizona Ag-Day Committee.
• Sherman, J. D. (2016, March). What's Your Botanical Name? (100%). Cochise County Master Gardeners High Desert Gardening & Landscaping Conference. University of Arizona South Campus, Sierra Vista, AZ: Cochise County Master Gardeners.
• Sherman, J. D. (2016, October). The Pecan: Through the Ages (100%). New Mexico State University Pecan Production Short Course. Farm Heritage Museum, Las Cruces, NM: New Mexico State University.
• Sherman, J. D. (2015, August/Summer). Nickel: Small Element, Big Impact (100%). Arizona Pecan Growers Association Conference. Tucson, AZ: Arizona Pecan Growers Association.
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  The mineral element nickel is the most recent element to be added as an essential nutrient to plants. Nickel is placed in the micronutrient category unlike the macronutrients such as nitrogen, phosphorous, or magnesium because it is needed in the plant in smaller amounts (ppm versus a %). Although it is a trace metal in soils and plants, only being required in minute quantities, on a parts per million basis in leaf tissue, it has a tremendous impact on secondary processes that occur within the plant tissue and vascular system. Research conducted by Bruce Wood has verified that nickel is responsible for "mouse-ear" deficiency symptom in pecan trees. Originally, it was thought that manganese or copper caused this symptom but it was just that pure forms of nickel fertilizer were not being used to test the hypothesis. What is known about nickel is that it works in primary and secondary metabolism. Four major pathways in primary metabolism, including the ever important ureide and urea cycle which is responsible for moving nitrogen from the roots in the spring and converting the nitrogen to an organic form of nitrogen that can be used by the plant. In secondary metabolism, nickel acts as protection from pests and disease being part of three chemical groups: terpenes, phenolics, and nitrogen-containing compounds. Nine enzymes in the plant have been proven to require nickel and yet other enzymes need it as a structural component. So far it has been found that the zinc to nickel and copper to nickel concentration ratios within the plant influences the expression of nickel deficiency with "mouse-ear" symptom. It is therefore recommended, based on research by Bruce Wood, that an early spring application of nickel, at or just post bud-break helps significantly reduce the "mouse-ear" symptom. As a fairly new element to be found as essential there is still room to learn more about this element and its relationship to other processes but also the recommended concentration in leaflet tissue in Arizona pecans. Currently the recommendation is 3 - 15 ppm for pecan but more research is needed in this regard for Arizona pecans since this recommendation is site specific. Therefore, a research study has been put in place to study nickel in Arizona pecan to investigate the relationship of nickel treatments to photosynthesis. The research will begin in 2016.
• Sherman, J. D. (2015, December/Winter). Pecan: The Good, The Bad, The Nutty (100%). Tree Health Care Workshop. Tucson: University of Arizona.
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  Pecan is native to North America where they naturally grow along the Mississippi River valley as far north as the southern tip of Illinois down through Texas and into the southern tip of Oaxaca, Mexico. Arizona’s climate has proven to be conducive to growing pecan. One of the earliest known plantings is in Camp Verde along a street known as Pecan Lane, in which orchards were planted by seed in 1920. Pecan comes in number one as Arizona’s commercial tree crop for economic contribution. In 2014, the value of pecan production in Arizona alone was $42 million. In order to efficiently maximize pecan production, important management decisions are made at farm locations. Irrigation, nutrients, and pruning are of upmost concern. However, pest and disease management are just as critical to ensure optimal growth of the pecan fruit. As far as pests are concerned (e.g. aphids, nematodes, caterpillars), they are minimal and can be managed. When it comes to disease, these are also minimal, especially compared to the southeastern pecan production region. Lately however, positive identification of bacteria known as Xylella fastidiosa was observed for the first time in Arizona pecan this year. A current survey is being conducted to investigate the extent of distribution of this bacterium.

Poster Presentations

• Sherman, J. D. (2018, August/Summer). Weevils Not Welcome (100%). University of Arizona Cooperative Extension Conference. Tucson, Arizona: University of Arizona Cooperative Extension.

Others

• Sherman, J. D. (2018, January). Training for Performance, Perseverance, & Productivity (100%). Pecan South.
• Sherman, J. D. (2018, July). No Holding Back Good Ole H2O (100%). Pecan South.
• Sherman, J. D. (2018, May). Grafting: Some Kind of Magic (100%). Pecan South.
• Sherman, J. D. (2018, November). Colors of Fall, Colors of Health (100%). Pecan South.
• Sherman, J. D. (2017, April). Transitioning to Micro-Irrigation: Things to Consider (100%). Pecan South.
• Sherman, J. D. (2017, July). An Unusual Insect: Just a Pest, Not a Threat (100%). Pecan South.
• Sherman, J. D. (2017, October). Shuck Split: A Dynamic Event and Bio-Chemical Ballet (100%). Pecan South.
• Pater, S. E., Sherman, J. D., & Groth, J. K. (2015, August). Cochise County Master Gardeners Website (80%) New. http://cals.arizona.edu/cochise/mg
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  Updated into Drupal format by CALS Web Development Group.
• Pater, S. E., Sherman, J. D., & Groth, J. K. (2015, August). Cochise County Master Gardeners Website (80%). http://cals.arizona.edu/cochise/mg
  More info

  Updated into Drupal format by CALS Web Development Group.
• Sherman, J. D. (2015, April). Ready, Set ...Grow! (100%). High on the Desert Cochise County Master Gardener Newsletter. https://cals.arizona.edu/cochise/mg/newsletter
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  9 articles