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RISS 인기검색어
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- 저자 : Habtamu Terefe (검색결과 4 건)
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Wondimu Adila,Habtamu Terefe,Agdew Bekele 한국작물학회 2021 Journal of crop science and biotechnology Vol.24 No.4
Common bacterial blight (CBB) is an economically important disease of common beans and causes signifcant yield losses worldwide, including Ethiopia. Therefore, development and use of resistant cultivars are important options to manage the disease. Thus, feld reactions of common bean genotypes to CBB and their agronomic performances were conducted at two locations in Southern Ethiopia, during 2018/2019. The experiment was arranged in a randomized complete block design with three replications. Analysis of variance revealed signifcant (P<0.01) genotypic variation for disease and yield parameters at both locations. The results showed wide ranges of variation in incidence (26.05–82.75%), severity (23.75–70.70%), AUDPC (773.9–2544%-days) and disease progress rate (0.024–0.142 unit day−1) on average for both locations. And also, remarkable genotypic variation for quantitative growth and yield characters such as plant height, days to 50% fowering, days to 90% maturity, number of pods, number of seeds, seed weight and grain yield were observed. Based on mean severity and R8_severity score, genotypes were grouped as 20% resistant, 55% moderately resistant and 25% susceptible at JARC, and 15% resistant, 80% moderately resistant and only 5% susceptible at Debub Ari. Variable relationships were found among and between parameters studied. The overall results indicated that SER119 and MALB135 showed consistent resistance reaction to CBB, and SER119 also gave high yield across felds. It is recommended to use SER119 with proper management practices for bean production and MALB135 as parent for CBB resistance development in plant breeding programs of the country
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Samuel Tegene,Habtamu Terefe,Esayas Tena The Korean Society of Plant Pathology 2024 식물병연구 Vol.30 No.1
The development of sustainable smut management techniques requires an understanding of the impacts of smut on sugarcane growth and the relationships between smut intensity and meteorological variables, varieties, and crop types. Thus, assessments were made with the objectives to 1) determine the effect of smut on the above-ground growth of sugarcane, and 2) quantify the association of smut with weather variables, varieties and crop types. The effect of smut on above-ground growth was assessed in six fields planted with NCo 334 (wider coverage) having 6 months of age in Fincha and Metehara fields in 2021. Data on above-ground growth were taken from 20 randomly selected smut-affected and healthy stools from each field. Besides, 6 years' data (2015 to 2021) on the numbers of smut-affected stools and smut whips of 79 fields were collected. Furthermore, 10 years' (2011 to 2021) weather data were acquired from the sugar plantations. The results demonstrated reduction in the above-ground growth of sugarcane in the range of 18.39% and 73.42% due to smut. In addition, weather variables explained about 68.48% and 66.58% of the variability in the number of smut-affected stools and whips respectively. Smut intensity increased with crop types for susceptible varieties. The tight association between the smut epidemic and crop types, varieties, and weather, implied that these parameters must be carefully considered in management decisions. Continuous monitoring of smut disease, meteorological variables, varieties, and crop types in all the sugarcane plantations could be done as a part of integrated smut management in the future.
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Bitew Beyene,Fininsa Chemeda,Terefe Habtamu,Ahmed Seid 한국작물학회 2023 Journal of crop science and biotechnology Vol.26 No.2
Faba bean is a cool season food legume crop. However, productivity of the crop is constrained by faba bean gall (FBG), which is an emerging disease that threatens faba bean production in Ethiopia. Field experiments were conducted on farmers’ fields to develop integrated management options that combine host resistance and fungicides to reduce FBG disease and minimize yield losses, and to determine fungicide spraying schedules in Bassona Worana district of Ethiopia, during 2018 and 2019. The treatments included three faba bean (Degaga, Gora, and local) genotypes, two fungicides, and two spray schedules, which were factorial arranged in a randomized complete block design with three replications. The results revealed that integration of faba bean genotypes, fungicides, and spray schedules significantly (P < 0.001) reduced FBG disease progression and increased grain yield though genotypes showed variable disease reactions in both years. Gora sprayed with Bayleton at 10 days interval recorded low FBG disease progression (0.0125 and 0.0121 units day–1), severity (21.7 and 10%) and AUDPC (1866.7 and 751.7%-days), and high grain yield (3.7 and 5.0 t ha–1) in 2018 and 2019, respectively. Unsprayed plots of each genotype obtained high disease and low yield parameters in both years. However, high marginal rate of return was obtained from genotypes sprayed with Bayleton at 15 days interval in 2018 and 2019. Therefore, application of Bayleton at a rate of 0.7 kg ha−1 three-to-four sprays’ frequency with moderately tolerant faba bean variety can be recommended to manage FBG development and optimize grain yield in the study area.
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Mengesha Getachew Gudero,Terefe Habtamu,Cheleko Dizgo Chencha 한국작물학회 2022 Journal of crop science and biotechnology Vol.25 No.1
Chocolate spot is economically the most important and destructive disease of faba bean. Field studies were conducted to develop and determine an integrated option that consisted of host resistance and fungicide rates to reduce chocolate spot progression and minimize yield loss of faba bean at two locations in Southern Ethiopia in 2018 and 2019. The experiment was factorial arranged in a randomized block design with three replications. Results revealed cultivar, fungicide rate, and their interactions strongly (p<0.001) infuenced disease progress rate, severity, and area under disease progress curve (AUDPC). The lowest (0.0094–0.0254 units day–1) and the highest (0.0175–0.0393 units day–1) progression rates were computed from cultivar Gebelcho and local at all application rates, respectively. All cultivars highly reduced disease severity and AUDPC at 3 kg ha–1 foliar application rate over controls at both locations and seasons. Cultivars and fungicide rates variably afected yield where Gebelcho (+63.09%), Moti (+55.58%), and Degaga (+54.91%) exceeded yield obtained from the local cultivar at Bonke in 2019. In addition, Degaga performed well at Chencha in both years. In addition, cultivars attained very low yield loss when treated at a rate of 2½ and 3 kg ha–1 fungicide applications. Moreover, disease components established signifcantly negative relationships with yield parameters at both sites over years. Furthermore, integration of host resistance (Degaga and Gebelcho) and fungicide application rates of 2½ and 3 kg ha–1 provided higher monetary advantages than the untreated plots. However, stability analysis, low yield loss and monitory advantage showed planting Degaga at a rate of 2½ kg ha–1 was the most cost-efective option in reducing disease pressure and increasing yield parameters; and suggested to growers in the study areas.
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