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Teklue T.,Jimma University | Teklue T.,Alamata Agricultural Research Center | Tolosa T.,Jimma University | Tolosa T.,Ghent University | And 5 more authors.
Tropical Animal Health and Production | Year: 2013

This study reports a prevalence and risk factor survey of brucellosis in small ruminants in Southern Zone of Tigray Region, Northern Ethiopia between October 2011 and April 2012 to determine the sero-prevalence of small-ruminant brucellosis and to identify associated risk factors for the occurrence of disease in small ruminants under extensive production system. Multistage random sampling was followed to select locations, flocks, and individual animals. Laboratory analysis of serum samples provided sero-prevalence estimates for flocks and geographic location. Information on risk factors at the individual and flock level was obtained by examination of individual animal and a questionnaire interview to flock owners. The overall individual animal-level sero-prevalence of brucellosis in small ruminants was 3.5 % and flock level sero-prevalence was 28.3 %, and the within-flock sero-prevalence was ranged from 0 % to 22.2 % based on the Complement Fixation Test. Multivariable logistic regression showed that the major risk factors for flock level sero-positivity were flock size and abortion history. This study showed that small-ruminant brucellosis is prevalent in the study area. Larger flock size and history of previous abortion in the flock were major risk factors identified for sero-positivity of small-ruminant brucellosis. © 2013 Springer Science+Business Media Dordrecht. Source


Hailu B.,Jimma University | Hailu B.,Semera University | Tolosa T.,Jimma University | Tolosa T.,Ghent University | And 5 more authors.
Preventive Veterinary Medicine | Year: 2014

Lumpy skin disease (LSD) is one of the major livestock disease problems in most areas of Ethiopia. A questionnaire-based cross-sectional study was conducted from October 2011 to February 2012 in four selected districts of Afar and Tigray regions to estimate the herd-level prevalence of LSD, and to assess its associated risk factors. Herd-owners were selected based on the willingness to provide information to complete the questionnaire. A total of 393 questionnaires were collected. Out of 393 herd-owners, 173 reported having LSD in their herds, giving an estimated herd- and animal-level prevalence of (44%, 95% CI: 37-50%) and (7.4%, 95% CI: 6-8%), respectively. Herd prevalence between regions and among the districts were significantly different (χ2=8, P<0.01 and χ2=9.9, P<0.01), respectively. The risk factors of LSD occurrence were introduction of a new animal to the herd, herd size, and utilization of communal grazing and watering points. These management characteristics cannot be readily changed in the studied area, hence, disease control should rely on a greater use of effective LSD vaccines. © 2014 Elsevier B.V. Source


Teferi T.A.,Alamata Agricultural Research Center | Gebreslassie Z.S.,Mekelle Agricultural Research Center
Crop Protection | Year: 2015

Septoria tritici blotch is an important disease in many wheat-producing areas of Ethiopia which causes significant yield losses. To investigate the intensity of Septoria tritici blotch in Tigray, where wheat is one of the major crops, disease assessment surveys were conducted from 2011 to 2013 main cropping seasons. It was based on inspection of wheat fields randomly selected at 5km intervals along accessible routes. The result showed that the disease incidence and severity varied from season to season and across locations within the region. Fifty two, 147 and 137 fields were examined from 2011 to 2013, respectively. During 2011, Septoria tritici blotch was present in 53% of the inspected fields with mean incidence and severity of 14% and 19%, respectively. Likewise, the disease was also important in 2012 and 2013 seasons with grand prevalence of 64% and 38%, in that order. The mean incidence and severity of the disease was 50% and 17% in 2012 and 28% and 13% in 2013, respectively. The survey also confirms that no variety has been identified with a high level of resistance, and only varieties with partial resistance or that could tolerate the disease and produce reasonable yields. Therefore, development and deployment of resistance varieties coupled with periodic investigation of the pathogen diversity needs due emphasis for safeguarding of wheat production sustainably. © 2014 Elsevier Ltd. Source


Atsbha T.,Alamata Agricultural Research Center | Estifanos A.,Mekelle Agricultural Research Center | Wayu S.,Alamata Agricultural Research Center | Tesfay T.,Alamata Agricultural Research Center | Baraki A.,Alamata Agricultural Research Center
Livestock Research for Rural Development | Year: 2015

The experiment was undertaken at Emba Alaje District, Ayba Peasant Association (PA) for two consecutive years, which is 2013 to 2014, to evaluate forage yield of the natural pasture through application of urea and slurry and third control one. A factorial RCBD design replicated three times with two factors and three levels were used. Each treatment was allocated to 25m2 in both years. Partial budget analysis, dominance analysis and marginal rate of return were calculated to compare treatments economic benefits. Seven grasses, five annual legumes and two other herbaceous species belonging to different families were identified in all the plots. Dry matter yield (DMY) significantly increased by application of urea over the application of slurry and the control. The relative proportion of grass, and legumes reached highest and significant by urea application. The effect of years was also only significantly varied for DMY. The interaction effect of fertilization with years was significantly different for all the parameters with the highest result being for application of urea except for legumes and other plant species composition. However, application of slurry is an economical way of degraded pasture land improvement and improves grass-legume species composition. © 2015 Fundacion CIPAV. All rights reserved. Source

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