The FTBP at FABI offers a disease clinic to avocado growers for the identification of avocado diseases. A consultation fee will be charged accordingly.

How to sample?

  • Take a photo of the symptoms, if possible
  • Samples should be taken from 4-5 randomly selected plants in an infection site.
  • Place the samples separately in a paper bag (Never use a plastic bag!!)
  • Seal the bag and label with the following: Collectors name, date, sample number, locality and cultivar

Specific tissue sampling

  • Collect individual leaves, place between blotting paper (paper towel) and in an envelope
  • Collect a sample that spans the diseased area, including +/- 2cm of healthy tissue on either side of the lesion
  • Place in a paper bag
  • Collect 200g of soil from under the diseased tree at a depth of 10-15 cm, place in a paper bag
  • Collect root pieces (healthy and diseased) from the soiland place in an envelope
Send the samples by fast mail or courier to the Avocado Disease Clinic @ FABI and give us a phone call to let us know to expect a parcel from you.
Dr. Noƫlani van den Berg
74 Lunnon street
Fruit Tree Biotechnology Programme at FABI
University of Pretoria
012 420 3856

082 775 4983

New Publications

Export to RIS
Reitmann A, Berger DK, Van den Berg. (2017) Putative pathogenicity genes of Phytophthora cinnamomi identified via RNA-Seq analysis of pre-infection structures. European Journal of Plant Pathology 147(1):211-228. 10.1007/s10658-016-0993-8
Meyer FE, Shuey LS, Ramsuchit S, Mamni T, Berger DK, van den Berg N, Myburg AA, Naidoo S. (2016) Dual RNA-sequencing of Eucalyptus nitens during Phytophthora cinnamomi challenge reveals pathogen and host factors influencing compatibility. Frontiers in Plant Science 7:191. 10.3389/fpls.2016.00191 PDF
Backer R, Mahomed W, Reeksting B, Engelbrecht J, Ibarra-Laclette E, van den Berg N. (2015) Phylogenetic and expression analysis of the NPR1-like gene family from Persea americana (Mill.). Frontiers in Plant Science 6:300. 10.3389/fpls.2015.00300
Reeksting BJ, Coetzer N, Mahomed W, Engelbrecht J, van den Berg N. (2014) De novo sequencing, assembly, and analysis of the root transcriptome of Persea americana (Mill.) in response to Phytophthora cinnamomi and flooding. PLoS ONE 9(2):e86399. 10.1371/journal.pone.0086399 PDF
Reeksting BJ, Taylor N, van den Berg N. (2014) Flooding and Phytophthora cinnamomi: Effects on photosynthesis and chlorophyll fluorescence in shoots of non-grafted Persea americana (Mill.) rootstocks differing in tolerance to Phytophthora root rot. South African Journal of Botany 95:40-53. 10.1016/j.sajb.2014.08.004 PDF