OLESEN, Trevor

Trevor Olesen

Research interests

  • Canopy management of avocado, custard apple, lime, mango and macadamia using pruning strategies and rootstocks.


Varied: scientific work in research and tertiary teaching; for the past 15 years Trevor has worked on the canopy management and postharvest of subtropical tree crops.


  • BSc(Hons) in Botany from the University of Adelaide in 1982
  • PhD in Plant Science from the University of Tasmania in 1992

Current projects

  • Pruning strategies for macadamia
  • Rootstock assessment for custard apple

Recent publications


McFadyen LM, Robertson D, Sedgley M, Kristiansen P, Olesen T (2011) Post-pruning shoot growth increases fruit abscission and reduces stem carbohydrates and yield in macadamia.  Annals of Botany (in press)

Olesen T (2011) Late 20th century warming in a coastal horticultural region and its effects on tree phenology. New Zealand Journal of Crop and Horticultural Science (in press)

Olesen T, Huett D, Smith G (2011) The production of flowers, fruit and leafy shoots in pruned macadamia trees. Functional Plant Biology 38, 327-336.

Wilkie JD, Sedgley M, Olesen T (2010) The timing of pruning affects flushing, flowering and yield of macadamia. Crop & Pasture Science 61, 588-600.

Olesen T, Muldoon SJ (2009)  Branch development in custard apple (cherimoya Annona cherimola Miller x sugar apple A. squamosa L.) in relation to tip-pruning and flowering, including effects on production. Trees 23, 855-862.

Wilkie JD, Sedgley M, Olesen T (2009) A model of vegetative flush development and its potential use managing macadamia (Macadamia integrifolia) tree canopies. Crop & Pasture Science 60, 420-426.

Wilkie JD, Sedgley M, Morris S, Muldoon S, Olesen T (2009) Characteristics of flowering stems and raceme position in macadamia. Journal of Horticultural Science & Biotechnology 84, 387-392.

Olesen T, Robertson D, Muldoon S, Meyer R (2008) The role of carbohydrate reserves in evergreen tree development, with particular reference to macadamia. Scientia Horticulturae 117, 73-77.

Wilkie JD, Sedgley M, Olesen T (2008) Regulation of floral initiation in horticultural trees. Journal of Experimental Botany 59, 3215-3228.

Wilkie JD, Sedgley M, Robertson D, Olesen T (2008) The timing of pruning affects flush development and flowering in ‘Honey Gold’ mango. Acta Horticulturae 787, 241-243.

Olesen T, Morris S, McFadyen L (2007) Modelling the interception of photosynthetically active radiation by evergreen subtropical hedgerows. Australian Journal of Agricultural Research 58, 1-9.

Olesen T, Whalan K, Muldoon S, Robertson D, Meyer R (2006)  On the control of bud release in macadamia (Macadamia integrifolia). Australian Journal of Agricultural Research 57, 939-945.

Olesen T (2005) The timing of flush development affects the flowering of avocado (Persea americana) and macadamia (Macadamia integrifolia x tetraphylla). Australian Journal of Agricultural Research 56, 723-729.

Olesen T, Nacey L, Wiltshire N, O’Brien S (2004) Hot water treatments for the control of rots on harvested litchi (Litchi chinensis Sonn.) fruit. Postharvest Biology and Technology 32, 135-146.

Olesen T, Menzel CM, Wiltshire N, McConchie CA (2002) Flowering and shoot elongation of lychee in eastern Australia. Australian Journal of Agricultural Research 53, 977-983.

Final reports

McFadyen L, Wilkie JD, Huett D, Olesen T (2010) Flowering and fruiting of macadamia in relation to pruning, light distribution, canopy architecture and cultivar, MC04024. Horticulture Australia Limited.

Baker GR, Doran JC, Williams ER, Olesen TD (2009)  Improved tea tree varieties for a competitive market. Rural Industries Research and Development Corporation, ACT.

Olesen T, Wiltshire N, McConchie C (2003) Improved postharvest handling of lychee, 77 pp. RIRDC Publication No 03/111. Rural Industries Research and Development Corporation, ACT.

Fields of research

  • 070601 Horticultural Crop Growth and Development

Australian and New Zealand Standard Research Classification (ANZSRC)

Keyword/phrase list of research interests

  • Canopy management
  • Tree flowering
  • Light interception
  • Carbohydrate metabolism

Contact details

Email: trevor.olesen@dpi.nsw.gov.au