Louise Ferguson, PhD

Director, Fruit and Nut Research and Information Center Cooperative Extension Expert
(530) 752-0507


  • B.S., Anthropology, University of Pennsylvania, State College, PA, 1969
  • M.S., Plant Physiology and Horticulture, University of Florida, Gainesville, 1980
  • Ph.D., Plant Physiology and Horticulture, University of Florida, Gainesville 1984
  • Extension Specialist, Pomology, University of California, 1980 - present
  • Assoc. Editor, Plant Growth Regulator Applications: HortScience, 1993 - present
  • Director, Fruits and Nuts Information Center, University of California, 1996 - present
  • Kellogg Fellow: California Ag Leadership Program, 1999 - 2001
  • Vice President and President, Plant Growth Regulator Society of American, 2002 - 2005

Research Statement

My research has focused on improving production efficiency and cultivar and rootstock evaluation. Under this general heading, I have concentrated my research in these specific areas:


  • Determining salinity tolerance of 4 major pistachio rootstocks.
  • Pistachio rootstock trials to determine the contribution of rootstock and scion in alternate bearing, and to evaluate the horticultural performance of four major pistachio rootstocks.
  • Pistachio cultivar development and evaluation.


  • Evaluation of citrus rootstocks for Satsuma and Clementine mandarins and red grapefruit.
  • Evaluation of Satsuma and Clementine mandarin introductions.


  • Evaluation of foliar urea sprays on olive.
  • Developing mechanical pruning of olives.
  • Investigation of etiology of oil scum in canned olives.


  • Breeding new cultivars of non-caprifying Calimyrna type figs.
  • Investigating effect of pruning on Black Mission fig size.