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Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes
Thesis (MScAgric)--Stellenbosch University, 2026.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2026
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| _version_ | 1867613930146234368 |
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| access_status_str | Open Access |
| author | Shao, Okamelang |
| author2 | Swanepoel, Pieter |
| author_browse | Shao, Okamelang Swanepoel, Pieter |
| author_facet | Swanepoel, Pieter Shao, Okamelang |
| author_sort | Shao, Okamelang |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MScAgric)--Stellenbosch University, 2026. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/135855 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:43:57.787Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/135855 Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes Shao, Okamelang Swanepoel, Pieter Rose, Lindy Van Coller, Gert Stellenbosch University. Faculty of AgriSciences. Dept. of Agronomy. Thesis (MScAgric)--Stellenbosch University, 2026. Shao, O. 2026. Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/7c0dea62-0cfe-4774-a1e8-3e40f85225aa Wheat is the second most important cereal crop in South Africa after maize. Nationally, most wheat production occurs in the Western Cape. There are various challenges that affect wheat production including increasing production costs and wheat diseases. Prices of fertilisers, fungicides and labour have been increasing, and it affects production, lowering economic benefits. Wheat disease incidence and severity is increasing resulting in lower grain yield. Integrated disease management strategies have been implemented in the Western Cape to limit disease development and lower resistance risk. Integrated disease management strategies can be designed to use disease-resistant cultivars and fungicides to create a cost-effective fungicide spray programme lowering production costs and managing wheat diseases. The aim of the study was to examine the effects of fungicide treatments of varying costs on numerous agronomic and economic parameters on the eight most popular wheat cultivars in the Western Cape during two growing seasons. The trials occurred in the Swartland area at the Langgewens Experimental farm, and in the Rûens area at a site in Napier. Wheat from eight cultivars was subjected to two fungicide treatments including a control which received a seed treatment only, a low-intermediate fungicide and a high-cost fungicide spray programme. Additionally, a cost-analysis of the treatments was conducted. A trial examining the effects of treatments on disease development and agronomic parameters was conducted. Visual disease assessments were conducted to measure disease development. Agronomic parameters that were assessed include leaf-area index, grain yield, biomass, thousand kernel weight, protein content and hectolitre mass. The results from the study show that there was no interaction between cultivars and fungicide spray programmes. The effects of the cultivars and the fungicide spray programmes were assessed individually. There was no significant difference between the effects of the low- intermediate cost and high-cost fungicide spray programme on disease development and agronomic parameters. There were no distinct trends on the effects of cultivars on disease development and agronomic parameters. This could be attributed to the weather conditions over the two growing seasons. The cost analysis of the fungicide treatments demonstrated that the gross margin of the high-cost fungicide spray programme was higher than the low-intermediate cost programme and control making it the most cost-effective control option under the conditions tested. This finding reveals that investing in the more expensive fungicide program yields more economic benefits dismissing the notion that the utilisation of c cheaper fungicide programme to lower production costs automatically generates higher economic benefits. For future research, more studies on the cultivars and fungicide treatments should be considered. Masters 2026-04-13T12:39:26Z 2026-04-13T12:39:26Z 2026-03 Thesis https://scholar.sun.ac.za/handle/10019.1/135855 en Stellenbosch University 67 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Shao, Okamelang Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| title | Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| title_full | Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| title_fullStr | Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| title_full_unstemmed | Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| title_short | Wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| title_sort | wheat cultivar response to foliar diseases as influenced by different fungicide spray programmes |
| url | https://scholar.sun.ac.za/handle/10019.1/135855 |
| work_keys_str_mv | AT shaookamelang wheatcultivarresponsetofoliardiseasesasinfluencedbydifferentfungicidesprayprogrammes |