DISEASE CLINIC

 
The ARP 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

 
Leaves
  • Collect individual leaves, place between blotting paper (paper towel) and in an envelope
 
Stems/Branches
  • Collect a sample that spans the diseased area, including +/- 2cm of healthy tissue on either side of the lesion
  • Place in a paper bag
 
Roots/Soil
  • 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.
 
 
Prof Noëlani van den Berg
 
74 Lunnon street
Avocado Research Programme
FABI
University of Pretoria
Pretoria
0001
 
012 420 3856

082 775 4983

 

New Publications

Van den Berg N, Du Toit M, Morgan SW, Fourie G, De Beer ZW. (2019) First Report of Fusarium euwallaceae on Persea americana in South Africa. Plant Disease 10.1094/PDIS-10-18-1818-PDN
Zumaquero A, Martinez-Ferri E, Matas AJ, Reeksting B, Olivier NA, Pliego-Alfaro F, Barcelo A, van den Berg N, Pliego C. (2019) Rosellinia necatrix infection induces differential gene expression between tolerant and susceptible avocado rootstocks. PLoS ONE 14(2):e0212359. 10.1371/journal.pone.0212359
Backer R, Naidoo S, van den Berg N. (2019) The NONEXPRESSOR OF PATHOGENESIS-RELATED GENES 1 (NPR1) and Related Family: Mechanistic Insights in Plant Disease Resistance. Frontiers in Plant Science 10:102. 10.3389/fpls.2019.00102
Nsibo DL, Barnes I, Kunene NT, Berger DK. (2019) Influence of farming practices on the population genetics of the maize pathogen Cercospora zeina in South Africa. Fungal Genetics and Biology 125:36-44. 10.1016/j.fgb.2019.01.005
Kuhn DN, Livingstone DS, Richards JH, Manosalva P, van den Berg N, Chambers AH. (2019) Application of genomic tools to avocado (Persea americana) breeding: SNP discovery for genotyping and germplasm characterization. Scientia Horticulturae 246:1-11. 10.1016/j.scienta.2018.10.011