All field trips and field extension work undertaken by the staff and students of the CTHB is coordinated by Prof Jolanda Roux. She also ensures that reports on these trips and research findings are communicated to relevant stakeholders. The extension component of the CTHB involves the presentation of talks at research meetings and field days, publication of articles in newsletters and newspapers as well as radio interviews to educate the public regarding tree health.

Research in the Kruger National Park (KNP)

In the latter part of 2004, the CTHB formed an alliance with the KNP in order to study the diseases of trees in the park.

One of the main projects constituting this research agreement was to investigate fungi and insects associated with wounds on trees caused by elephants in KNP. Additional projects have been initiated to identify any possible serious tree diseases present in the reserve.

(See "Information Nuggets" for more detail)

African collaborations

Insect pests and pathogens do not recognize international boundaries, making it crucial for collaboration between different countries in order to effectively manage tree diseases. There has thus been a strong drive by the TPCP and CTHB to build collaborations with researchers in other African countries, including Cameroon, Namibia, Malawi, Mozambique, Zambia and Zimbabwe. Several disease survey trips are regularly undertaken to these countries, where most activities focus on the health of Myrtales, Adansonia digitata and other savanna tree species.

(See "Information Nuggets" for more detail)

Pest and Pathogen Diagnostic Clinic

The TPCP and CTHB maintain a world-class disease and insect pest Diagnostic Clinic. In addition to providing an invaluable service to the South African Forestry Industry, the Diagnostic Clinic also provides stakeholders with the capacity to identify insect pest and disease outbreaks associated with native trees.

For more information about the disease and insect pest Diagnostic Clinic, please visit: TPCP Services.

New Publications

Kim JS, Lee W, Seo CW, Lee JW, Perera RH, Rho SM, Visagie CM, Houbraken J, Lim YW. (2026) A comprehensive assessment of Penicillium diversity in marine environments. Studies in Mycology 115:1–57. 10.3114/sim.2026.115.01
Jami F, Truter M, Pavlic M, Chen SF, Roux J. (2026) Identification of Botryosphaeriaceae species in the South African National Collection of fungi, including a novel species of Oblongocollomyces. African Biodiversity & Conservation 56(1):1-13. PDF
Vettraino AM, Bose T. (2026) Urban green spaces as emerging hotspots for Phytophthora diversity: a global synthesis of host associations, distribution and management gaps. Frontiers in Forests and Global Change 9:1872981. 10.3389/ffgc.2026.1872981
Burgess TI, Wingfield MJ. (2026) Unveiling a hidden menace: Invasive tree pathogens, less known but increasingly threatening Southern hemisphere forests. Annual Review of Phytopathology 64 10.1146/annurev-phyto-011325-100959
Motete T, Solís M, Hammerbacher A, Naidoo S. (2026) Gene expression profiling in Eucalyptus associates Phenylpropanoid resistance to Teratosphaeria destructans. Plant Pathology 10.1111/ppa.70207
Aylward J, Atkins S, Roets F, Danti R, Della Rocca G, Emiliani G, Fraser S, Garbelotto MM, Herron DA, Scali E, Wingfield BD, Wingfield MJ. (2026) High genetic diversity in the Cypress canker pathogen Seiridium cardinale in the Southern Hemisphere. Plant Pathology 75 10.1111/ppa.70212
van Heerden A, Pham NQ, Duong TA, Wingfield MJ, Wingfield BD. (2026) Draft genome sequence of Ganoderma philippii, a serious root rot pathogen of Eucalyptus in Southeast Asia. Australasian Plant Pathology 55:81. 10.1007/s13313-026-01159-1
Townsend G, Hill M, Hurley BP, Roets F. (2026) Native Scolytinae and Platypodinae beetle assemblages in indigenous South African forests and their co-occurrence with the invasive PSHB beetle. Journal of Insect Conservation 30 10.1007/s10841-026-00779-8
Bose T, Wingfield MJ. (2026) Plantations are invasive pathogen bridgeheads—response to Li et al.. Trends in Ecology & Evolution 10.1016/j.tree.2026.05.006
Jamieson B-A, Paap T, Pegg GS, Carnegie AJ, Wingfield MJ, Roux J, Hardy GEStJ, Drenth A, Hammerbacher A, Bose T. (2026) Quambalaria spp.: Emerging Tree Pathogens of Concern. Current Forestry Reports 12:13. 10.1007/s40725-026-00274-y
Masuku SK, De Vos L, Thabiso TE, Steenkamp ET, Wingfield BD. (2026) Baseline sensitivity of South African Fusarium circinatum to tebuconazole. Journal of Plant Pathology 10.1007/s42161-026-02197-w
Fitawek W, Anjulo A, Healey M, Lawson SA, Hurley BP. (2026) The Moringa value chain in Ethiopia and the socio-economic impact of pests and diseases. CABI Agriculture and Bioscience 10.1079/ab.2026.00041 PDF
Lynn KMT, Wingfield MJ, Oliveira LSS, Alfenas AC, Ferreira Alfenas RF, Marincowitz S, Barnes I. (2026) Phylogenetic and population genetic analyses reveal patterns of divergence amongst isolates of Ceratocystis manginecans. Ecology and Evolution 16 10.1002/ece3.73652
Dlamini CM, Matongera TN, Lawson SA, Healey M, Tanga A, Regasa K, Kassie W, Hurley BP, Germishuizen I. (2026) Modelling spatiotemporal dynamics of wattle plantations in northwestern Ethiopia using harmonised PlanetScope and RapidEye imagery. Trees, Forests and People 25:101293. 10.1016/j.tfp.2026.101293 PDF
Ndou M, Potts WM, Duong TA, Teske PR, Childs AR, Henriques R. (2026) Conspecific scaffold-level genome assembly outperforms heterospecific chromosome-level assemblies for assessing genetic indicators in a threatened marine fish. Evolutionary Applications 19:e70247. 10.1111/eva.70247
Marx B, van Dijk A, Steenkamp ET, Wingfield MJ, Wingfield BD. (2026) Breaking the mould: Cellulose in the cell walls of the Ophiostomatales. Fungal Biology Reviews 57 10.1016/j.fbr.2026.100489
Wingfield BD, Coetzee MPA, Wingfield BJ, Groenewald M, Pohl C, Wingfield MJ. (2026) The genetic blueprint of Cyclohexamide resistance: Analysis of 816 yeast species. Research Square 10.21203/rs.3.rs-9313202/v1
Paap T, White D, Bose T, Burgess TI. (2026) Diversity and phylogeny of Phytophthora Clade 9, including descriptions of three novel species. Mycological Progress 25:29. 10.1007/s11557-026-02140-4
Kgatla MM, Barker C, Baxter JR, Bester-van der Merwe AE, Chaisi M, Chakona A, Cherry MI, Daniels SR, Du Preez LH, Haddad CR, Hawkes PG, Ho C, Hoareau TB, Jacobs A, Jacobs K, Janion-Scheepers C, Jansen van Vuuren B, Kabongo RM, Khoza TT, Khumalo NL, Mahlanza T, Makapela L, Makhubo BG, Maneveldt GW, Mashego K, Matcher G, Matthee CA, Mavhunga M, Midgley JM, Mlambo M, Monsanto DM, Mthombeni R, Murray SL, Mynhardt S, Nang-Mba B, Ndlovu M, Parbhu SP, Phetla V, Phukuntsi M, Pitcher TR, Samaai T, Sethusa MT, Simon CA, Sink K, Sole CL, Theron GL, van Asch B, van der Bank M, van Steenderen CJM, Villet MH, Visagie CM, Williams KA, Willows-Munro S, Da Silva JM, Mwale M. (2026) An overview of DNA barcoding of biodiversity in South Africa. PLOS ONE 21(4):e0345173. 10.1371/journal.pone.0345173
Li GQ, Slippers B, Wingfield MJ, Chen SF. (2026) Diversity, distribution and host range of Botryosphaeriaceae in China. Forest Pathology 10.1111/efp.70077