Host-status and host-sensitivity of sweet potato cultivar ‘Blesbok’ to Meloidogyne javanica


Citation :- Host-status and host-sensitivity of sweet potato cultivar ‘Blesbok’ to Meloidogyne javanica . Res. Crop. 26: 336-351
K. M. POFU AND P. W. MASHELA Kgabo.Pofu@ul.ac.za
Address : University of Limpopo, Green Biotechnologies Research Centre of Excellence Department of Plant Production, Soil Science and Agricultural Engineering,Private Bag X1106, Sovenga 0727 South Africa
Submitted Date : 17-03-2025
Accepted Date : 30-05-2025

Abstract

Sweet potato (Ipomoea batatas L.) is an important staple crop valued for its high nutritional content and adaptability to adverse environmental conditions. However, its production is constrained by root-knot nematodes (Meloidogyne species), particularly Meloidogyne javanica (Treub [Chitwood]) which significantly reduce yield and quality in various crops. This study evaluated the host-status and host-sensitivity of the sweet potato cv. ‘Blesbok’ to M. javanica in a pot experiment, conducted at the Green Biotechnologies Research Centre of Excellence, University of Limpopo. A randomized complete block design with seven inoculation levels (0, 5, 25, 125, 625, 3125 and 15625 eggs + second-stage juveniles (J2) and six replications were used. Validation was done over two growing seasons. Nematode reproductive factor (RF), root galls and key plant variables were assessed at 56 days after inoculation. Meloidogyne javanica was able to establish and reproduce on ‘Blesbok’ at low inoculation levels, with RF exceeding 1, but declined to below 1 at higher inoculation levels. Variable RF values, the absence of root galls and plant variables which were not affected by nematode infection, but all suggested a degree of tolerance rather than resistance. The findings suggest that while ‘Blesbok’ can be cultivated in nematode-infested fields, integrated pest management strategies may be necessary to mitigate nematode pressure in high-density infestation areas. Future research should focus on alternative control measures to enhance the sustainability of sweet potato production in nematode-prone environments.

Keywords

Biofortification host sensitivity host status Meloidogyne javanica resistance sweet potato tolerance


References

Atungwu, J. J., Ozuzu, L. and Tijjani, I. (2013). Categorization of 10 sweet potato (Ipomoea batatas (L.) Lam.) varieties for resistance to Meloidogyne spp. in organic field. Arch. Phytopathol. Plant Protec. 46: 253-60.
Bouis, H. E., Hotz, C., McClafferty, B., Meenakshi, J. V. and Pfeiffer, W. H. (2017). Biofortification: A new tool to reduce micronutrient malnutrition. Food Nutr. Bull. 32: 31-40.
Bridge, J. and Starr, J. L. (2007). Cereals: Rice (Oryza sativa). In: Plant nematodes of agricultural importance: A Colour Handbook. 1st Edn. CRC Press, Manson Publishing. pp. 152. doi:10.1201/b15142.
Causton, D. R. (1977). A biologist’s mathematics: contemporary biology. Arnold, E., 1977, University of California, 25 Hill Street, London. pp. 326.
Cervantes-Flores, J. C., Yencho, G. C. and Davis, E. L. (2002). Host reactions of sweet potato genotypes to root-knot nematodes and variation in virulence of Meloidogyne populations. Hort. Sci. 37: 1112-16.
Coyne, D. L., Cortada, L., Dalzell, J. J., Claudius-Cole, A. O., Haukeland, H., Luambano, N. and Talwana, H. (2018). Plant-parasitic nematodes and food security in Sub-Saharan Africa. Annu. Rev. Phytopathol. 56: 381-403.
Elling, A. A. (2013). Major emerging problems with minor Meloidogyne species. Phytopathol. 103: 1092-1102.
Fourie, H., De Waele, D., McDonald, A. H., Miene, C. M. M. and De Beer, A. (2015). Nematode pests threatening soybean production in South Africa, with reference to Meloidogyne: A review. S. Afn. J. Sci. 111: 1-9.
Fassuliotis, G. (1970). Resistance of Cucumis spp. to the root-knot nematode, Meloidogyne acrita. J. Nematol. 2: 174-77.
Gomes, J., Junior, V., Mattes De Oliveira, C., Azevedo, A., Maluf, W. and Gomes, L. (2015). Resistance of sweet potato clones to Meloidogyne incognita races 1 and 3. Bragantia 74: 291-97.
Gurmu, F., Hussein, S. and Laing, M. (2015). Diagnostic assessment of sweet potato production in Ethiopia: Constraints, post-harvest handling and farmers’ preferences. Res. Crop. 16: 104-15.
Hussey, R. S. and Barker, K. R. (1973). A comparison of methods of collecting inocula of Meloidogyne species, including a new technique. Plant Dis. Rep. 42: 865-72.
Jia, R., Zhang, R., Gangurde, S. S., Tang, C., Jiang, B., Li, G. and Wang, Z. (2022). Integrated analysis of carotenoid metabolites and transcriptome identifies key genes controlling carotenoid compositions and content in sweet potato tuberous roots (Ipomoea batatas L.). Front. Plant Sci. 13: doi:10.3389/fpls.2022.993682.
Karuri, H. W., Olago, D., Neilson, R., Mararo, E. and Villinger, J. (2017). A survey of root knot nematodes and resistance to Meloidogyne incognita in sweet potato varieties from Kenyan fields. Crop Prot. 92: 114-21.
Laurie, S. M., Faber, M., Adebola, P. and Belete, A. (2015). Biofortication of sweet potato for food and nutrition security in South Africa. Food Res. Int. 76: 962-70.
Makhwedzhana, M. M. (2018). Nematode resistance and resistance mechanism in sweet potato cultivars ‘Bophelo’, ‘Bosbok’ ‘Mvuvhelo’ to Meloidogyne incognita. Master’s dissertation, Faculty of Science and Agriculture, University of Limpopo, Sovenga, South Africa. pp. 102.
Marais, M., Swart, A., Fourie, H., Berry, S. D., Knoetze, R. and Malan, A. P. (2017). Techniques and Procedures. In: Nematology in South Africa: A view from the 21st century (Eds. Fourie, H., Spaull, V., Jones, R., Daneel, M. and De Waele, D.). Springer International Publishing: Cham, Switzerland. pp. 73−117.
Mwanga, R. O. M., Jolien Swanckaert, Guilherme da Silva Pereira, Maria I. Andrade, Godwill Makunde, Wolfgang J. Grüneberg, Jan Kreuze, Maria David, Bert De Boeck, Edward Carey, Obaiya Utoblo, Dorcus Gemenet, Milton O. Anyanga, Benard Yada, Doreen M. Chelangat, Bonny Oloka, Kiddo Mtunda, Martin Chiona, Some Koussao, Sunette Laurie, Hugo Campos, G. Craig Yencho and Jan W. Low (2021). Breeding progress for vitamin A, iron, and zinc biofortification, drought tolerance, and sweet potato virus disease resistance in sweet potato Front. Sustain. Food Syst. 5: doi:10.3389/fsufs.2021.616674.
Oostenbrink, M. (1966). Major characteristics of the relation between nematodes and plants. Mede. Landbouwhog. Wagen. 66: 1-46.
Onkendi, M. E., Kariuki, G. M., Marais, M. and Moleleki, L. N. (2014). The threat of root-knot nematodes (Meloidogyne spp.) in Africa. Plant Pathol. 64: 727-60.
Pofu, K. M., Mashela, P. W., Laurie, S. M. and Oelofse, D. (2017). Host-status of sweet potato cultivars to South Africa root-knot nematodes. Acta Agric. Scand. Section B-Soil Plant Sci. 67: 62-66.
SAS Institute (2008). Statistical Analysis Systems Computer Package. SAS Institute Inc., Cary, New York.
Seinhorst, J. W. (1967). The relationship between population increases and population density in plant-parasitic nematodes. 3. Definition of the terms host, host-status and resistance. 4. The influence of external conditions on the regulation of population density. Nematologica 13: 429-42.
Seinhorst, J. W. (1965). The relationship between nematode density and damage to plants. Nematologica 11: 137-54.
Sikora, R. A. and Fernandez, E. (2005). Nematode parasites of vegetables. In: Plant-parasitic nematodes in subtropical and tropical agriculture (Eds. Luc, M., Sikora, R. A. and Bridge, J.). Centre for Agriculture and Biosciences International: Wallingford. pp. 319-92.
Thies, J. A., Ariss, J. J. and Merrill, S. B. (2020). Resistance to root-knot nematodes in sweet potato: Current knowledge and prospects for the future. Hort. Sci. 55: 533-40.
Taylor, A. L., and Sasser, J. N. (1978). Biology, Identification and control of Root-knot Nematodes (Meloidogyne species). International Nematology Project, North Carolina State University, Graphics, Raleigh. pp. 111.
Trudgill, D. L. (1992). Resistance to and tolerance of plant-parasitic nematodes in plants. Annu. Rev. Phytopathol. 29: 167-92.
Windham, G. L. and Williams, W. P. (1988). Reproduction of Meloidogyne javanica on corn hybrids and inbreeds. Annu. Appl. Nematol. 2: 25-28.
Wondafrash, M., Yirga, Y. and Sisay, T. (2022). Status and management of root-knot nematodes (Meloidogyne spp.) in vegetable production: A review. Agric. Food Sec. 11: 1-14.
 
 
 

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