ABOUT THE COLLECTION

The Citrus Report, first published in 1978, is one of several commodity-based agricultural research reports published by the University of Arizona. The purpose of the report is to provide an annual research update to farmers, researchers, and those in the agricultural industry. The research is conducted by University of Arizona and USDA-ARS scientists.

Both historical and current Citrus Reports have been made available via the UA Campus Repository, as part of a collaboration between the College of Agriculture and Life Sciences and the University Libraries.

Other commodity-based agricultural research reports available in the UA Campus Repository include:
Cotton Reports | Forage & Grain Reports | Sugarbeet Reports | Turfgrass Reports | Vegetable Reports


QUESTIONS?

Contact CALS Publications at pubs@cals.arizona.edu, or visit the CALS Publications website.


Contents for Citrus Research Report 1990

Recent Submissions

  • Helicopters and Frost Prevention: A Preliminary Evaluation

    Brown, Paul W.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Chill Hour Assessment for the Yuma Area

    Brown, Paul W.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Fruit and Nut Tree Variety Trial -- Yuma

    Roth, Robert L.; Gardner, Bryant R.; Kilby, Michael W.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Deciduous Fruit Trees at the Tucson Extension Garden Center

    Brookbank, George; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Extension Fruit and Nut Program Report for Mohave County

    Grumbles, Rob; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Deciduous Fruit Variety Planting at the U of A Citrus Station, Maricopa County

    True, Lowell; Bacon, Dean; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Effect of Nitrogen Application on Growth and Photosynthetic Nitrogen use Efficiency in Two Ecotypes of Wild Strawberry, Fragaria chiloensis (L.) Duchn

    Moon, J. W. Jr.; Bailey, D. A.; Fallahi, E.; Jensen, R. G.; Zhu, G.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
    The relationships between increasing nitrogen fertilization and growth, maximum CO₂ assimilation and the initial slope of the CO₂ response curve were studied in two ecotypes of wild strawberry, Fragaria chiloensis (L) Duchn. Nitrogen accumulation of CA11, an ecotype from a low -nutrient dune site, was greater at all nitrogen concentrations than that of RCP37, an ecotype from a higher- nutrient strand site. Maximum CO₂ assimilation, total Rubisco activity, dry weight, and initiation of leaves and crowns were higher in CA11 than RCP37 as nitrogen treatment was increased from 0 to 200 mg l⁻¹, whereas these parameters were lower in CA11 when fertilized at 300 mg l⁻¹, but not in RCP37. The mean leaf area of CA11 was greater than RCP37 when grown with no supplemental nitrogen, but mean leaf area of the two lines was similar under nitrogen fertilization. Maximum CO₂ assimilation and carboxylation efficiency increased with increasing leaf nitrogen in both clones. At equivalent concentrations of leaf nitrogen, RCP37 had higher CO₂ assimilation and carboxylation efficiency than CA11 and the difference between the 2 clones increased as leaf nitrogen increased. Thus, RCP37 had a higher photosynthetic nitrogen use efficiency than CA11. However, at a given applied nitrogen level, CA11 allocated more nitrogen to a unit of leaf area so that photosynthetic rates were higher than RCP37, except at the highest application of 300 mg l⁻¹. The high nitrogen accumulation capacity and resource allocation to fruiting structures (crowns) in CA11 lead us to suggest that this clone may possess genes that could increase fruit yield in cultivated strawberry.
  • Effects of Various Chemicals on Dormancy, Maturity and Thinning of Peaches

    Fallahi, Esmaeil; Kilby, Michael; Moon, John W.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
    Effects of 5 chemicals on the reduction of dormancy and early maturity of peaches were studied for 3 years under the desert climatic condition of Southwest Arizona. CuSO4, urea and particularly hydrogen cyanamide reduced the dormancy and enhanced blooming. Application of hydrogen cyanamide in October induced full bloom in November (1 month after application) and produced fruit. Late November was the most appropriate time for application of hydrogen cyanamide, and fruit were harvested 10 days before normal time in April. No difference was found between 5% and 3% (V/V) of hydrogen cyanamide in the time of blooming; however, rate at 5% always caused some phytotoxicity. Application of hydrogen cyanamide at 1% before bloom and at full bloom produced the same size of commercially packed fruit as hand-thinned ones.
  • Quantification of Pecan Water Stress for Irrigation Scheduling

    Garrot, D. J. Jr.; Kilby, M. W.; Fangmeier, D. D.; Husman, S. H.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Seasonal Nutrient Content of Pistachio Leaves in Arizona

    Kilby, Michael W.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Pistachio Rootstock Evaluation

    Young, Deborah; Beede, Bob; Starlings, Talbott; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Insects Affecting Commercial Jojoba Production in Arizona

    Rethwisch, Michael D.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Evaluation of Insecticides and Oils for Jojoba Scirtothrips ewarti bailey Control

    Rethwisch, Michael D.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Control of Jojoba Looper by Insecticides

    Rethwisch, Michael D.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Evaluation of Pyrenone and a Detergent for Jojoba Scirtothrips ewarti bailey Control

    Rethwisch, Michael D.; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Jojoba Harvesting Equipment

    Coates, Wayne; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Annual Weed Control in Apples -- Spring Valley Farms 1984-85

    Heathman, Stanley; Kilby, Mike; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Internal Bark Necrosis in Southeastern Arizona Apples

    Doerge, Thomas A.; Young, Deborah; Owen, Claire; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Root and Crown Rot of Apple Trees Caused by Phytophthora

    Matheron, Michael; Young, Deborah; Matejka, Joe; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)
  • Control of Phytophthrowa Root and Crown Rot of Apple Trees

    Young, Deborah; Matheron, Michael; Kilby, Michael W.; Bantlin, Marguerite (College of Agriculture, University of Arizona (Tucson, AZ), 1990-12)

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