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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

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Human ZR, Crous CJ, Roets F, Venter SN, Wingfield MJ, de Beer ZW. (2017) Biodiversity and ecology of flower-associated actinomycetes in different flowering stages of Protea repens. Antonie van Leeuwenhoek 10.1007/s10482-017-0942-3
Wingfield BD. (2017) The peer review system has flaws. But it’s still a barrier to bad science. The Conversation http://bit.ly/2holsgS
McTaggart AR, Beasley DR, Wingfield MJ, Wood AR, Pretorius ZA, Drenth A, Shivas RG, Roux J. (2017) A dynamic, web-based resource to identify rust fungi (Pucciniales) in southern Africa. MycoKeys 26:77-83. 10.3897/mycokeys.26.14602
De Maayer P, Aliyu H, Vikram S, Blom J, Duffy B, Cowan DA, Smits THM, Venter SN, Coutinho TA. (2017) Phylogenomic, pan-genomic, pathogenomic and evolutionary genomic insights into the agronomically relevant enterobacteria Pantoea ananatis and Pantoea stewartii. Frontiers in Microbiology 8(1755) 10.3389/fmicb.2017.01755
Jami F, Wingfield MJ, Gryzenhout M, Slippers B. (2017) Diversity of tree-infecting Botryosphaeriales on native and non-native trees in South Africa and Namibia. Australasian Plant Pathology 10.1007/s13313-017-0516-x