Field survey was done in North Gondar during 2014/2015 and 2015/2016 cropping seasons with the objective of, assessing the importance of faba bean diseases. Disease severity varied across and within districts. Chocolate spot (Botrytis fabae), gall-forming (Olpidium viciae), rust (Uromyces fabae) and aschochyta blight (Aschochyta fabae) were the most dominate and frequently occurring diseases of faba bean. The highest mean severity of chocolate spot (43%) and rust (36%) were recorded at Takusa district whereas the highest mean severity (42%) of gall-forming disease was recorded at Debark district. The association of independent variables with faba bean disease varied among themselves. Variables such as year, altitude, growth stage of the crop and crop conditions were significantly associated with the chocolate spot, gall-forming, and rust diseases. Chocolate spot, gall-forming, and aschochyta blight diseases severity was higher in surveyed fields with an altitude greater than 2,700 m above sea level (masl). However, rust severity was higher in areas with an elevation below 2,200 m.a.s.l. Among growth stages, the highest disease severity of chocolate spot, rust, and aschochyta blight was recorded on fields during the flowering stage. Therefore, integrated disease management options should be developed for the future for those major diseases of faba bean.
The survey was done on major pulse crop growing districts with the objective of assessing the distribution and occurrence of Orobanche spp. in the highlands of North Gondar. Representative Farmer's fields from selected seven districts were assessed in every 5-10 km interval along the road ride to record the incidence, prevalence and severity of Orobanche spp. In all surveyed districts of N. Gondar Orobanche crenata was found with the highest prevalence and incidence of 85.71% and 10.71%, respectively on fields covered with Linseed. Among districts, the highest prevalence of 66.67% was recorded on both Chilga and Gonder zuria districts. In addition to this, a maximum severity of 3 out of 6 (i.e. majority of host plants infected with two shoots) was recorded only on two fields out of all fields surveyed of the seven districts. During the survey, it was found that Xanthium strumarium was its wild host. Finally, awareness creation and establishment of quarantine system should be done to minimize the dissemination of parasitic weed seed to other areas within the administrative zone and the region. Likewise, different management options should be developed in the future not only to minimize the yield loss due to Orobanche crenata but also to manage its wild hosts like Xanthium strumarium.
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