A survey of cropping practices and foliar diseases of common beans in Ethiopia
1996
Habtu, A. | Sache, I. | Zadoks, J.C.
Field surveys were conducted in three major bean growing areas of Ethiopia. Data collected included cropping systems and severities of bean diseases. We used correspondence analysis to characterize differences in disease severity between regions and seasons, and to determine associations between geographic areas and cropping systems, areas and diseases, and cropping systems and diseases. Chi square analyses suggested a high probability of high plant density, high weediness, high bacterial blight and high anthracnose being associated with area 1 (Rift Valley). In area 2 (Sidamo) there was a high probability of high rust intensity, low plant density and low weediness. Area 3 (Keffa) was characterized by a high probability of angular and floury leaf spots. In area 1 (Rift Valley), low rust intensity was closely associated with year 1 (1990) and high rust intensity with year 4 (1993). Anthracnose and bacterial blight showed no clear association with years. Some linkages between cropping systems and disease severities were indicated. In areas 1 and 2, there was a high probability of low rust at early sowing and a high probability of bacterial blight at high weediness and high plant density situations. The probability of observing high rust severity at high weediness was low. This study suggests that specific needs of areas, with their own production situations, must be considered in the process of developing strategies for the improvement of production and crop protection in beans.
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