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Dr. Glynnis Cook

Dr. Glynnis Cook

Glynnis Cook
Programme Coordinator: Graft Transmissible Diseases
CRI at Nelspruit

She trained and worked as a plant virologist at the Agricultural Research Council for most of her working career and diverted into sales for a short period whereafter she again joined the agricultural research sector and was appointed at CRI in August 2009. 

  • MSc at Pretoria University in 1993
  • PhD (Genetics) at Stellenbosch University in 2019
Current Research Focus 
  • Investigation into the Citrus tristeza virus (CTV) strains impacting cross-protection which is a management strategy applied by the Citrus Improvement Scheme (CIS) to minimize losses incurred by severe strains of CTV encountered in the field.
  • The effect that certain viroids may have on tree health and production. This also includes investigation into the sensitivity of commercial rootstocks to certain viroid species.
  • A new approach to early detection of Huaglongbing /Greening disease by means of sniffer dogs is being tested following successes by American researchers with the dogs.
  • Maintain and improve essential diagnostic systems for the CIS at Nelspruit.
Recent Research Papers 

Cook, G., van Vuuren, S. P., Breytenbach, J. H. J., Burger, J. T., and Maree, H. J. 2016. Expanded Strain-Specific RT-PCR Assay for Differential Detection of Currently Known Citrus tristeza virus Strains: a Useful Screening Tool. Journal of Phytopathology 164:847-851.

Cook, G., van Vuuren, S. P., Breytenbach, J. H. J., Steyn, C., Burger, J. T., and Maree, H. J. 2016. Characterization of Citrus tristeza virus Single-Variant Sources in Grapefruit in Greenhouse and Field Trials. Plant Disease 100:2251-2256.