Numerous CTHB projects aim to improve our understanding regarding the biology and ecology of the microbes and insects associated with woody hosts indigenous to South Africa.

The tree species receiving most attention are Syzygium cordatum, Syzygium guineense, Acacia karroo, Acacia mellifera, Acacia erioloba, Adansonia digitata, Pterocarpus angolensis, Sclerocarya birrea, Rapanea melanophloeos, Colophospermum mopane, Aloe plictilis and species in the Proteaceae, Rutaceae, Rubiaceae and the genera Virgillia and Terminalia.

The specific microbes that are targeted include species in the Botryosphaeriaceae, Cryphonectriaceae and Uredinales (Ravenelia, Puccinia and Uromyces), as well as the genera Armillaria, Ganoderma, Fusarium, Mycosphaerella, Phellinus, Ceratocystis, Gondwanamyces, Coniothyrium (Colletogloeopsis / Phaeophleospora / Kirramyces), Cylindrocladium, Dothistroma, Pantoea, Ophiostoma, Candidatus Liberibacter africanus and Phytophthora.

The insects currently receiving most attention include bark beetles, bruchid beetles, as well as Coryphodema tristis and a number of species that could possibly be used in biocontrol programmes.

Various CTHB projects also consider the ecology and population biology of specific tree species to evaluate the effect that human practices (e.g. timber harvesting, coppicing, bark stripping, etc.) might have on the target plant, ecosystems and the conservation of natural habitats. Many further focus on the possible impacts that soil properties, nutrients, rhizobial symbioses and climatic factors might have on the invasiveness of certain species in diverse landscapes. A small number of projects also aim to investigate the effects that drought, frost and fire might have on the sustainable usage of indigenous woody resources.

New Publications

Nicole M. Van Dam, Mesfin Wondafrash, Vartika Mathur , Tom O. Tytgat. (2018) Differences in Hormonal Signaling Triggered by Two Root-feeding Nematode Species Result in Contrasting Effects on Aphid Population Growth. Frontiers in Ecology and Evolution 10.3389/fevo.2018.00088
Mlonyeni XO, Wingfield MJ, Greeff JM, Wingfield BD, Slippers B. (2018) Genetic diversity of Amylostereum areolatum, the fungal symbiont of the invasive woodwasp Sirex noctilio in South Africa. Forest Pathology :e12449. 10.1111/efp.12449
Tan YP, Shivas RG, Marney TS , Edwards J , Dearnaley J , Jami F , Burgess TI. (2018) Australian cultures of Botryosphaeriaceae held in Queensland and Victoria plant pathology herbaria revisited. Australasian Plant Pathology PDF
Jami F , Marincowitz S, Crous PW, Jacobsohn A, Wingfield MJ. (2018) A new Cytospora species pathogenic on Carpobrotus edulis in its native habitat. FUSE 2 10.3114/fuse.2018.02.03 PDF
Ali DB, Marincowitz S, Wingfield MJ, Roux J, Crous PW, McTaggart AR. (2018) Novel Cryphonectriaceae from La Réunion and South Africa, and their pathogenicity on Eucalyptus. Mycological Progress 10.1007/s11557-018-1408-3