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Aggressiveness variation among the population of Colletotrichum kahawae representing seven major coffee-growing administrative zones of Ethiopia was studied under greenhouse conditions. The experiment was conducted through cross inoculation of eight Arabica coffee cultivars with seven C. kahawae isolates. The results revealed the presence of significant (p

Variations among the populations of Colletotrichum species from diseased coffee berries were studied. A total of 35 Colletotrichum isolates representing 24 districts from major coffee-producing regions of Ethiopia was studied on the basis of cultural, morphological, and pathological characteristics. The isolates differed significantly on their colony color, density, sector, and acervuli. Mycelial growth rate varied significantly (p

The effect of exogenous application of Monopotassium phosphate, Dipotassium phosphate, Jasmonic acid and Salicylic acid (SA) in triggering systemic resistance in Arabica coffee against coffee berry...

This study was conducted to determine the effect of integrated management of common bacterial blight ( Xanthomonas axopodai) of bean on disease development, yield and yield components. A field experiment was conducted at Chena district Dahera peasant association on farmers training center field during 2011/2012 main cropping season using four resistant common bean cultivars and one susceptible local check. Host resistance was integrated with seed treatment using Apron 2g/kg and cultural practice. The experiment was arranged in randomized complete block design in factorial combination with three replications. The results indicate that integrating of resistant varieties with chemical seed treatment and cultural practice were highly significant (p < 0.001) in reducing common bacterial blight development and increased seed yield and yield component of a bean. The highest percent severity index of common bacterial blight (71.95%) was observed in the control treatment when growing of local cultivar under farmer management practice. This level was reduced significantly to below 26% when planting chemically treated seed of the cultivars Awassa dumme, AFR-702 and Ibado on the ridges, with an average yield of more than 22 qt/ha. Generally, integrating host resistance with seed treatment and cultural practice could reduce the severity of common bacterial blight and increase yield and yield component of the bean. However, an extensive similar study should be conducted across different locations to come with a tangible recommendation. Handle: http://hdl.handle.net/20.500.11903/mjmbr.v2n2.11

Antifungal activities of 20 plant species were tested against Colletotrichum gloeosporioides, the causal agent of mango anthracnose. Culture sensitivity tests of the plant extracts were done using paper disc diffusion inhibition method. Among the twenty plant species extracted with ethyl acetate Ruta chalepensis and Eucalyptus globulus showed the highest activity. Methanol extracts of three plants, namely Datura stramonium, Adhatoda schimperiana and Eucalyptus globulus also showed remarkable activity. The extracts also significantly inhibit conidial germination of the test fungi over the control. Plant species that showed potential in vitro were selected and aqueous extracts of the plants were evaluated on artificially and naturally infected mango fruits. Development of anthracnose on mango fruits was significantly affected on both tests. Results of this study indicate that use of botanical for the control of anthracnose disease in mango is less expensive, safe and could serve as a good alternative to synthetic fungicides.DOI: http://dx.doi.org/10.3126/ijls.v8i1.9957