Abstract:
Faba bean (Vicia faba L.) is one of the major pulse crop grown in the highlands of Ethiopia but it
yield has been reduces due chocolate spot disease infestation. This study was conducted at dabat
district in 2020 cropping season with the objective assessing the economic importance of chocolate
spot disease and determine the integration management of faba bean chocolate spot disease by
using fababean varieties and fungicide application schedule. Survey was conducted in the five
major faba bean producing kebele of Dabat districts, North Gondar Zone a. A total of 385 faba
bean farmer fields were assessed for the incidence and severity of chocolate spot disease. Farmer
fields were assessed and the collected data were analyzed by using SPSS version 20. Field
experiment was arranged in randomly complete block design in 4x4 factorial combinations with
three replications. The treatments include four faba bean varieties( Local ,Walki, Dosha and
Tumsa) and four fungicide application schedule(un spray,7 day spray, 14 day spray and 21 day
spray) of Mancozeb 80% WP at 2.5kg/ha . The disease, yield and yield related data were subjected
to analysis of variance using the general linear model procedure of SAS 9.2. The surveyed kebele
most of the farmer sows local variety and does not use fungicide in this case chocolate spot disease
was high in all assessed field. Relatively high mean incidence (98.27%) and severity (73.05%) was
recorded at Abtera kebele and low disease incidence (91.79%) and severity (62.27%) was recorded
at Chila kebele. The interaction of variety with fungicide application schedule had significant
(p<0.05) effect on chocolate spot disease. The minimum disease severity (14.5%) recorded from
walki variety with 7 day spray interval of Mancozeb 80 % WP fungicide application while the
maximum disease severity (59.5%) was recorded from unsprayed local variety and the lowest
disease incidence (52.66 %)was recorded on walkie variety with 7 day fungicide spray
interval.while the highest disease incidence (95%) was recoreded from unsprayed local variety in
the final disease assessment. The highest AUDPC (1547.8%-day) was recorded from unsprayed
local variety while the lowest AUDPC (574.2%-day) was recorded from walki variety with 7 day
spray interval of mancozeb 80%WP fungicide. In this study Walki faba bean variety with fungicide
treatment particularly with weekly Mancozeb fungicide application schedule had provided best
result in terms of chocolate spot disease management and get benefit from yield production. Since
the research was conducted for one year the experiment should be repeated.