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Franz J.A. Niederholzer Ph.D.

Farm Advisor   Orchard Systems
Cooperative Extension Colusa County
PO Box 180, 100 Sunrise Boulevard
Suite E
Colusa, CA 95932
(530) 458-0570
fjniederholzer@ucanr.edu Create VCard

Also in:
Sutter-Yuba Counties



Ph.D. Soil Science, UC Davis. 1997
M.S. Soil Science, UC Davis. 1990
B.A. History, Amherst College. 1982


Prunes, almonds, pears, apple, cherry, olive, plum, citrus, and pomegranate

Areas of Expertise (click to see all ANR academics with this expertise)


Peer Reviewed

  • Niederholzer, F.J.A; Milliron, L., et al. (2022). Weather conditions contributing to crop failure in ‘Improved French’ prune grown in California. Acta Hortic. 1342, 329-336.
  • Mayanja, I.K.; Coates, M.C., et al. (2021). Development of a stockpile heated and ambient air dryer (SHAD) for freshly harvested almonds. Applied Engineering in Agriculture. 37:3, 417-425.
  • Chen, C.; Khir, R., et al. (2021). Energy consumption and product quality of off-ground harvested almonds under hot air column drying. LWT - Food Science and Technology. 138. March. https://doi.org/10.1016/j.lwt.2020.110768
  • Li, X.; Giles, D.K., et al. (2021). Evaluation of an Unmanned Aerial Vehicle as a New Method of Pesticide Application for Almond Crop Protection. Pest Management Science. 77:1, 527-537.
  • Jarvis-Shean, K.; Buchner, R., et al. (2021). Field evaluation of Prunus rootstocks for use in dried prune production. Acta Hortic. 1322, 139-146.
  • Milliron, L.; Niederholzer, F., et al. (2021). Field evaluation of rootstocks for ‘Improved French’ prune production in California grower trials. Acta Hortic. 1322, 125-130.
  • Johnson, B.; Niederholzer, F., et al. (2021). Improved understanding of the threat posed by Phellinus heart-rot in California prune orchards. Acta Hortic. 1322, 295-302.
  • Luo, Y.; Niederholzer, F.J.A., et al. (2021). Limited Evidence for Accumulation of Latent Infections of Canker-Causing Pathogens in Shoots of Stone Fruits and Nut Crops in California. Phytopathology. 111:11, 1963-1971.
  • Rosecrance, R.; Milliron, L., et al. (2021). Mechanical pruning of ‘Improved French’ prune trees. Acta Hortic. 1322, 253-258.
  • Luo, Y.; Niederholzer, F.J.A., et al. (2020). Inoculum quantification of cancer-causing pathogens, in prunes and walnut orchards using real time PCR. J Appl Microbiology. 129, 1337-1348.
  • Pourezza, A.; Moghimi, A., et al. (2020). Spray Backstop: A Method to Reduce Orchard Spray Drift Potential without Limiting the Spray and Air Delivery. Sustainability. 12:21, 8862-8875.
  • Niederholzer, F.J.A.; Glozer, K. (2019). Bloom timing and fruit set of ‘Improved French’ prune following dormant application of horticultural oil or nitrogen fertilizers as rest-breaking agents. Acta Hort. 1260, 117-123.
  • Siegel, J.P.; Strmiska, M.M., et al. (2019). Evaluating insecticide coverage in almond and pistachio for control of navel orangeworm (Amyelois transitella) (Lepidoptera: Pyralidae). Pest Manag Sci. 75:5, 1435-1442.
  • Wunderlich, L.R.; Niederholzer, F.J.A., et al. (2019). Survey reveals training needs for airblast sprayer applicators, farm managers, owners and pest control advisors. Outlooks on Pest Management. 30:2, 53-60.
  • Luo, Y.; Lichtenburg, P.S.F., et al. (2019). Understanding the process of latent infection of canker-causing pathogens in stone fruit and nut crops in California. Plant Disease. 110:9, 2374-2384.
  • Niederholzer, F.J.A.; Lampinen, B., et al. (2018). Conditioning harvested almonds on the orchard floor to reduce drying time of wetted almonds. Acta Hort. 1219, 243-250.
  • Venkitasamya, C.; Brandl, M., et al. (2018). Feasibility of using sequential infrared and hot air for almond drying and inactivation of Enterococcus faecium. LWT. 95, 123-128.
  • DeJong, T.M.; Castro, S., et al. (2017). Challenges to prune production in increasingly variable Californian weather conditions. Acta Hort. 1175, 25-28.
  • Markle, J.C.; Niederholzer, F.J.A., et al. (2016). "Evaluation of spray application methods for navel orangeworm control in almonds." Pesticide Management Science 72(12): 2339-2346.
  • Lampinen, B.; Upadhyaya, S., et al. (2015). "A second generation mobile platform for assessing midday canopy photosynthetically active radiation interception in orchard systems." Acta Hort 1058: 105-112.
  • O'Geen, T.; Saal, M., et al. (2015). "Soil suitability index identifies potential areas for groundwater banking on agricultural lands." California Agriculture 69(2): 75-84.
  • Hamby, K.A.; Nicola, N.L., et al. (2015). "Timing Spring Insecticide Applications to Target both Amyelois transitella (Lepidoptera: Pyralidae) and Anarsia lineatella (Lepidoptera: Gelechiidae) in Almond Orchards." Journal of Economic Entomology 108(2): 683-693.
  • Niederholzer, F.JA.; Pickel, C., et al. (2013). Alternatives to Traditional Dormant-Season Plum Aphid Control Are Effective. Acta Hortic. 985, 221-228.
  • Krueger, W.; Niederholzer, F., et al. (2013). Investigation of Pruning Strategies for Dried Plums Including Hand, Mechanical and Combinations. Acta Hortic. 985, 201-208.

California Agriculture Article Contributions

ANR Workgroup Associations

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