Chen, W.Q. & Swart, W.J. 2000. Fusarium oxysporum and F. sambucinum associated with root rot of Amaranthus hybridus in South Africa. Plant Disease 84: 101.
Blodgett, J.T., Swart, W.J., Louw, S.VdM. & Weeks, W.J. 2000. Species composition of endophytic fungi in Amaranthus hybridus leaves, petioles, stems and roots. Mycologia 92: 853-859.
Chen, W.Q. & Swart, W.J. 2001. Genetic variation among Fusarium oxysporum isolates associated with root rot of Amaranthus hybridus as determined by pathogenicity, isozymes and vegetative compatibility. Plant Disease 85: 1076-1080.
Swart, W.J., Tesfaendrias, M.T. & Botha, W. 2002. First report of basal stem rot caused by Pythium G-group on Kenaf in South Africa. Plant Disease 86: 698.
Blodgett, J.T. & Swart, W.J. 2002. Infection, colonization and disease of Amaranthus hybridus leaves caused by the Alternaria tenuissima group. Plant Disease 86: 1199-1205.
Chen, W.Q. & Swart, W.J. 2002. Phytotoxicity of Fusarium oxysporum and Fusarium sambucinum culture filtrates to Amaranthus hybridus and evaluation of amaranth germplasm for resistance. Euphytica 127(1): 61-67.
Louw, S.VdM., Swart, W.J., Honiball, S.J. & Chen, W.Q. 2002. Weevil-fungus interaction on Amaranthus hybridus in South Africa. African Entomology 10(2): 361-364.
Swart, W.J. & Swart, V.R. 2002. The current status of research on diseases of Opuntia ficus-indica in South Africa. Acta Horticulturae 581: 239-245.
Koch, S.H., Ghebremariam, D.S. & Swart, W.J. 2002. Characterization of South African isolates of Colletotrichum gloeosporioides associated with lupin anthracnose on sixteen lupin cultivars. African Plant Protection 8: 51-56.
Swart, W.J., Tesfaendrias, M.T. & Terblanche, J. 2003. First Report of Sclerotium rolfsii on kenaf in South Africa. Plant Disease 87: 874.
Swart, W.J., Nieuwoudt, D. & Pretorius, J.C. 2003. Influence of nitrogen fertilization on susceptibility of pistachio seedlings to Botryosphaeria obtusa and B. dothidea. African Plant Protection 9: 115-117.
Blodgett, J.T., Swart, W.J. & Louw, S.VdM. 2004. Identification of fungi and fungal pathogens associated with Hypolixus harens and decayed and cankered stems of Amaranthus hybridus. Plant Disease 88: 333-337.
Tesfaendrias, M.T., Swart, W.J. & Botha, W. 2004. The characterization of Pythium group G occurring on kenaf in South Africa. South African Journal of Plant and Soil 21: 25-29.
Ghebremariam, D., Groenewald, E.G., Koch, S.H. & Swart, W.J. 2004. The production of gibberellin-like substances by Colletotrichum gloeosporioides associated with lupin anthracnose. South African Journal of Botany 70: 235-240.
Blodgett, J.T., Swart, W.J., Louw, S.VdM. & Weeks, W.J. 2007. Soil amendments and watering influence the incidence of endophytic fungi in Amaranthus hybridus in South Africa. Applied Soil Ecology 35: 311-318.
Swart, W.J. 2009. Strategies for the management of cactus pear diseases: A global perspective. Acta Horticulturae (ISHS) 811:207-216.
Botha, C., McLaren, N.W., & Swart, W.J., 2009. Evaluation of greenhouse inoculation techniques used to screen for Sclerotinia stem rot resistance in soybeans. South African Journal of Plant and Soil 26(1):48-50.
Kena, M. & Swart, W.J. 2009. Microbial activity and fungal composition of composted animal manure suppressive to soil-borne pathogens. Lesotho Journal of Agricultural Sciences 2:1-19.
Tesfaendrias, M.T., McLaren & Swart, W.J. 2011. Grain mould fungi and their effect on sorghum grain quality. South African Journal of Plant and Soil 28(3):172-180
Botha, C., McLaren, N.W., & Swart, W.J., 2011. The effect of leaf wetness duration and temperature on the development of Sclerotinia stem rot on soybeans. South African Journal of Plant and Soil 28(3):208-211.
Kena, M. & Swart, W.J. 2011. Effects of plant extracts on in vitro suppression of fungal pathogens and control of damping-off of vegetable seedlings in the greenhouse. Botswana Journal of Agriculture and Applied Sciences 7:36-44.
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Wolmarans, K. and Swart, W.J. 2014. Influence of glyphosate, other herbicides and genetically modified herbicide resistant crops on soil microbiota:a review. South African Journal of Plant and Soil 31(4): 177–186
Gryzenhout, M., Fouché, H.J. and Swart, W.J. 2017. First report of a serious cladode disease of Opuntia ficus-indica (prickly pear) in South Africa caused by Bisfusarium lunatum. Plant Disease (in press).