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Research paper thumbnail of Fusarium head blight progression and yield response of bread wheat as affected by fungicides and spray regimes under field condition in southern Ethiopia

Journal of Crop Science and Biotechnology

Research paper thumbnail of Effects of cultivar resistances and chemical seed treatments on fusarium head blight and bread wheat yield-related parameters under field condition in southern Ethiopia

Heliyon, 2021

Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered among the economically si... more Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered among the economically significant and destructive diseases of wheat. Thus, the study was worked out at seven sites in southern Ethiopia during the 2019 main cropping year to decide the effects of host resistance and chemical seed treatment on the progress of FHB epidemics and to decide grain yield benefit and yield losses derived from the use of wheat cultivars integrated with chemical seed treatments. The field study was worked out with the integration of two wheat cultivars, including Shorima as well as Hidase, and five chemical seed treatments, including Carboxin, Thiram þ Carbofuran, Imidalm, Proceed Plus, and Thiram Granuflo. Twelve experimental treatments were arrayed in factorial arrangement with randomized complete block design. Each experimental treatment was replicated three times and delegated at random to experimental plots within a block. Significant (P < 0.01) variations were observed among the evaluated treatment combinations for rates of disease progress, incidence, severity, the area under the disease progress curve (AUDPC), and yield-related parameters across the locations. Results showed that the lowest incidence was registered on Shorima treated with Thiram þ Carbofuran fungicide (27.40%). The lowest mean disease severity was recorded from Shorima integrated with Imidalm (21.23%) and Shorima treated with Thiram þ Carbofuran (21.78%). The AUDPC was as low as 211.27, 226.39, and 236.46%-days were recorded on Shorima treated with Imidalm, Thiram þ Carbofuran, and Proceed Plus, respectively. The highest disease severity of 57.91% (Hidase) and 27.22% (Shorima), and AUDPC of 552.71%-days (Hidase) and 313.04%-days (Shorima) were recorded from untreated control plots of the two cultivars. Paramount grain yield was found from Shorima treated with Imidalm and Dynamic fungicides, each of which was noted with GY of 4.40 and 4.05 t ha À1 , respectively. Results also showed the highest yield losses (21.89 and 23.23%) were computed on untreated control plots of the cultivars Hidase and Shorima, respectively, compared with maximum protected experimental treatment for both cultivars. Moreover, cost-benefit analysis confirmed that Shorima treated with Imidalm exhibited the most prominent net benefit (NB) ($67,381.26 ha À1) and benefit-cost ratio (BCR) (4.43), followed by Shorima treated with Thiram þ Carbofuran (NB of $60,837.76 ha À1 and BCR of 3.98). Based on the lowest yield loss and highest economic advantage, the use of Shorima treated with either Imidalm or Thiram þ Carbofuran could be suggested to the farmers in the study areas and elsewhere having analogous agro-ecological conditions to manage the disease. However, sole use of chemical seed treatment is not as effective as post-anthesis aerial

Research paper thumbnail of Progression of Fusarium Head Blight Caused by Fusarium graminearum Schwabe Epidemic and Grain Yield of Wheat ( Triticum aestivum L.) as Affected by Host Resistance and Seed-Treating Fungicides in Southern Ethiopia

SSRN Electronic Journal, 2021

Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered as one of the economicall... more Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered as one of the economically important and destructive diseases of wheat. Thus, the field experiment was carried out at seven locations in Southern Ethiopia during the 2019 main production season to determine the effects of host resistance and seed treating fungicides on the progression of FHB epidemics and to determine grain yield benefit and yield losses derived from the use of a combination of wheat cultivars and seed treating fungicides. The study was conducted with a combination of two wheat cultivars (Shorima and Hidase) and five seed-treating fungicides, including Carboxin, Dynamic, Imidalm, Proseed Plus, and Thiram Granuflo. A total of 12 treatment combinations were formed, including an untreated. The experiment was laid out in a randomized complete block design in a factorial arrangement with three replications. The results obtained showed that North Ari exhibited the highest disease incidence (100%), severity (83.38%) and area under disease progress (AUDPC) (807.74%-day), and the lowest grain yield (0.94 t ha-1) than the other locations. Lowest incidence (10.93 and 13.52%), severity (10.96 and 12.26%), and AUDPC (59.81 and 71.74%-day), and the maximum grain yield (5.76 and 5.59 t ha-1) was recorded at Bonke and Chencha, respectively. Lowest incidence was registered on Shorima in combination with Dynamic fungicide (27.40%). Minimum disease severity was recorded on Shorima cultivar in combination with Imidalm (21.23%) and Dynamic (21.78%). The AUDPC was as low as 211.27, 226.39, and 236.46%-day in combination with Shorima with Imidalm, Dynamic, and Proceed Plus, respectively. The highest disease severity of 57.91 and 27.22%, and AUDPC of 552.71 and 313.04%-day were recorded on unsprayed plots of Hidase and Shorima cultivars, respectively. Based on the lowest yield loss and economic feasibility advantage, the use of Shorima in combination with Imidalm and Dynamic seed treating fungicides independently could be recommended to the farmers in the areas and similar agro-ecologies to manage FHB. However, the lonely use of seed treating fungicide does not as effective as post-anthesis aerial application of fungicide up to maturity of the crop; post-anthesis aerial application of fungicide should be considered in addition to seed treating fungicide for effective management of FHB.

Research paper thumbnail of Integration of host resistance, fungicides, and spray frequencies for managing Fusarium head blight of bread wheat under field conditions in southern Ethiopia

Research paper thumbnail of Fusarium head blight progression and yield response of bread wheat as affected by fungicides and spray regimes under field condition in southern Ethiopia

Journal of Crop Science and Biotechnology

Research paper thumbnail of Effects of cultivar resistances and chemical seed treatments on fusarium head blight and bread wheat yield-related parameters under field condition in southern Ethiopia

Heliyon, 2021

Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered among the economically si... more Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered among the economically significant and destructive diseases of wheat. Thus, the study was worked out at seven sites in southern Ethiopia during the 2019 main cropping year to decide the effects of host resistance and chemical seed treatment on the progress of FHB epidemics and to decide grain yield benefit and yield losses derived from the use of wheat cultivars integrated with chemical seed treatments. The field study was worked out with the integration of two wheat cultivars, including Shorima as well as Hidase, and five chemical seed treatments, including Carboxin, Thiram þ Carbofuran, Imidalm, Proceed Plus, and Thiram Granuflo. Twelve experimental treatments were arrayed in factorial arrangement with randomized complete block design. Each experimental treatment was replicated three times and delegated at random to experimental plots within a block. Significant (P < 0.01) variations were observed among the evaluated treatment combinations for rates of disease progress, incidence, severity, the area under the disease progress curve (AUDPC), and yield-related parameters across the locations. Results showed that the lowest incidence was registered on Shorima treated with Thiram þ Carbofuran fungicide (27.40%). The lowest mean disease severity was recorded from Shorima integrated with Imidalm (21.23%) and Shorima treated with Thiram þ Carbofuran (21.78%). The AUDPC was as low as 211.27, 226.39, and 236.46%-days were recorded on Shorima treated with Imidalm, Thiram þ Carbofuran, and Proceed Plus, respectively. The highest disease severity of 57.91% (Hidase) and 27.22% (Shorima), and AUDPC of 552.71%-days (Hidase) and 313.04%-days (Shorima) were recorded from untreated control plots of the two cultivars. Paramount grain yield was found from Shorima treated with Imidalm and Dynamic fungicides, each of which was noted with GY of 4.40 and 4.05 t ha À1 , respectively. Results also showed the highest yield losses (21.89 and 23.23%) were computed on untreated control plots of the cultivars Hidase and Shorima, respectively, compared with maximum protected experimental treatment for both cultivars. Moreover, cost-benefit analysis confirmed that Shorima treated with Imidalm exhibited the most prominent net benefit (NB) ($67,381.26 ha À1) and benefit-cost ratio (BCR) (4.43), followed by Shorima treated with Thiram þ Carbofuran (NB of $60,837.76 ha À1 and BCR of 3.98). Based on the lowest yield loss and highest economic advantage, the use of Shorima treated with either Imidalm or Thiram þ Carbofuran could be suggested to the farmers in the study areas and elsewhere having analogous agro-ecological conditions to manage the disease. However, sole use of chemical seed treatment is not as effective as post-anthesis aerial

Research paper thumbnail of Progression of Fusarium Head Blight Caused by Fusarium graminearum Schwabe Epidemic and Grain Yield of Wheat ( Triticum aestivum L.) as Affected by Host Resistance and Seed-Treating Fungicides in Southern Ethiopia

SSRN Electronic Journal, 2021

Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered as one of the economicall... more Fusarium head blight (Fusarium graminearum Schwabe), FHB, is considered as one of the economically important and destructive diseases of wheat. Thus, the field experiment was carried out at seven locations in Southern Ethiopia during the 2019 main production season to determine the effects of host resistance and seed treating fungicides on the progression of FHB epidemics and to determine grain yield benefit and yield losses derived from the use of a combination of wheat cultivars and seed treating fungicides. The study was conducted with a combination of two wheat cultivars (Shorima and Hidase) and five seed-treating fungicides, including Carboxin, Dynamic, Imidalm, Proseed Plus, and Thiram Granuflo. A total of 12 treatment combinations were formed, including an untreated. The experiment was laid out in a randomized complete block design in a factorial arrangement with three replications. The results obtained showed that North Ari exhibited the highest disease incidence (100%), severity (83.38%) and area under disease progress (AUDPC) (807.74%-day), and the lowest grain yield (0.94 t ha-1) than the other locations. Lowest incidence (10.93 and 13.52%), severity (10.96 and 12.26%), and AUDPC (59.81 and 71.74%-day), and the maximum grain yield (5.76 and 5.59 t ha-1) was recorded at Bonke and Chencha, respectively. Lowest incidence was registered on Shorima in combination with Dynamic fungicide (27.40%). Minimum disease severity was recorded on Shorima cultivar in combination with Imidalm (21.23%) and Dynamic (21.78%). The AUDPC was as low as 211.27, 226.39, and 236.46%-day in combination with Shorima with Imidalm, Dynamic, and Proceed Plus, respectively. The highest disease severity of 57.91 and 27.22%, and AUDPC of 552.71 and 313.04%-day were recorded on unsprayed plots of Hidase and Shorima cultivars, respectively. Based on the lowest yield loss and economic feasibility advantage, the use of Shorima in combination with Imidalm and Dynamic seed treating fungicides independently could be recommended to the farmers in the areas and similar agro-ecologies to manage FHB. However, the lonely use of seed treating fungicide does not as effective as post-anthesis aerial application of fungicide up to maturity of the crop; post-anthesis aerial application of fungicide should be considered in addition to seed treating fungicide for effective management of FHB.

Research paper thumbnail of Integration of host resistance, fungicides, and spray frequencies for managing Fusarium head blight of bread wheat under field conditions in southern Ethiopia