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Evaluation of Antagonistic Activities of Trichoderma Isolates...

ABSTRACT: The study was initiated with the objective of controlling tomato wilt disease (Fusarium  xysporum) using Trichoderma isolates as biocontrol agents. F. oxysporum was isolated from  iseased tomato plants grown in five selected kebeles of Dugda Bora and Adami Tulu Jido-Kombolcha  oredas of the Central Rift Valley (CRV) region of Ethiopia. The pathogenicity of F. oxysporum was determined on three different tomato varieties namely Cochoro, Miya and Fetane that were grown in 20 cm plastic pots containing 3 kg of autoclaved soil under the greenhouse.