Person: Abeyo Bekele Geleta
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Abeyo Bekele Geleta
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Abeyo Bekele Geleta
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0000-0002-8548-5128 7 results
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- Decade of stem rust research on Ug99: progress and challenges(CIMMYT, 2016) Bhavani, S.; Njau, P.N.; Wanyera, R.; Girma, B.; Abeyo Bekele Geleta; Badebo, A.; Woldeab, G.; Singh, R.P.; Huerta-Espino, J.; Gordon, C.
Publication - Bugday hastalik ve zararlilari: tarlada tanima kilavuzu(CIMMYT, 1987) Prescott, J.M.; Burnett, P.A.; Saari, E.E.; Ransom, J.K.; Bowman, J.; De Milliano, W.A.J.; Singh, R.P.; Abeyo Bekele Geleta
Publication - Wheat diseases and pests: a guide for field identification(CIMMYT, 2002) Singh, R.P.; Prescott, J.M.; Abeyo Bekele Geleta; Bowman, J.; Burnett, P.A.; De Milliano, W.A.J.; Ransom, J.K.; Saari, E.E.
Publication - Results of the first International Scab Resistance Screening Nursery (SRSN) 1985-86(CIMMYT, 1986) Abeyo Bekele Geleta; Singh, R.P.; Alcala de Stefano, M.Fusarium head scab is a common wheat disease in many parts of the world where the crop is grown at low elevations under wam, humid conditions and lingering cloud cover. The disease is also economically important al high elevations where there is continuous daily rain and predominant doud cover during the wheat growing cycle, especially from flowering to physiological maturity. Scab is caused by various Fusarium species, including F. equiseti, F. culmorum, F. avenaceum, and F. nivale, but it is F. graminearum (perfect stage: Gibberella zeae) that generally causes the major scab epidemics and yield losses. The other species of Fusarium are of lesser importance, and occur only under conditions extremely favorable to their development. Evaluation for resistance to scah disease begant at CIMMYT during the early 1980s. Artificial inoculation methods were developed for the successful generation of artificial epidemics. Thousands of CIMMYT-drived wheats and introduced germplasm were evaluated for resistance under artificially-created epidemics at the Toluca research station of CIMMYT. Germplasm was also especially introduced from those areas where this disease occurs more severely, e.g., China and Brazil. The primary criterion for selecting gennplasm for the Scab Resistence Screening Nursery (SRSN) at this beginning phase was to identify lines with better resistance. This report is a summary of results obtained from the 1st SRSN with respect to various agronomic and disease resistru1ce chamcteristics. It is hoped that some of the material in this nursery will prove to be useful to our cooperators in Scab-endemic regions and the information contained herein will be of service to wheat breeders.
Publication - Maladies et ravageurs du ble: guide d'identification au champ(CIMMYT, 1987) Prescott, J.M.; Abeyo Bekele Geleta; Bowman, J.; Burnett, P.A.; De Milliano, W.A.J.; Ransom, J.K.; Saari, E.E.; Singh, R.P.Depourvus de chlorophylle, ce en quoi ils different des autres plantes, les champignons n'ont done pas de capacite de photosyntese. Au lieu d'elaborer leur propre nourriture, ils absorbent des elements nutritifs qu'ils puisent dans les tissus marts ou vivants de l'hote. Ils se propagent de diverses manieres et peuvent etre transmis par la graine ou le sol, ou disperses par le vent, l'eau (de pluie ou d'arrosage), les insectes, les animaux et l'homme. L'infection par les champignons pathogenes est liee a divers facteurs: en general, leur reproduction requiert la presence d'eau a la surface de l'h6te et depend a la fois de la sensibilite de ce dernier, de la densite d'inoculum et de la temperature ambiante, et d'autres facteurs du milieu. Si certains champignons ne s'attaquent qu'a une ou a quelques especes hotes, d'autres par contre s'attaquent indistinctement a plusieurs d'entre elles. Les sympt6mes et l'evolution de la maladie dependent egalement de l'interaction entre le parasite et l'hote. Selan la nature des champignons qui sont a l'origine de la maladie, les symptomes peuvent etre semblables ou differents, ainsi leur identification categorique devra etre basee sur leur morphologie. Sauf indication contraire, les champignons dont ii sera traits ici sont ceux qui attaquent le ble tendre, le ble dur et le triticale.
Publication - Wheat diseases and pests: a guide for field identification(CIMMYT, 1986) Prescott, J.M.; Burnett, P.A.; Saari, E.E.; Ransom, J.K.; Bowman, J.; De Milliano, W.A.J.; Singh, R.P.; Abeyo Bekele Geleta
Publication - Enfermedades y plagas del trigo: una guia para su identificación en el campo(CIMMYT, 1986) Prescott, J.M.; Burnett, P.A.; Saari, E.E.; Ransom, J.K.; Bowman, J.; De Milliano, W.A.J.; Singh, R.P.; Abeyo Bekele GeletaThis booklet is designed as a quick guide for identifying wheat and triticale diseases in the field. It is intended primarily for agricultural researchers, technicians, and farmers in developing nations, but will also be of value to others. The text comprises a brief description of the major wheat and triticale diseases, insect pests, nematodes, physiologic and genetic disorders, and mineral and environmental stresses. Complementing this text as an aid to identification are numerous color photographs, drawings, and a brief diagnostic key. Emphasis has been placed on economically significant diseases, but is not limited to them
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