Three bio-agents . Trichoderma viride, Trichoderma harzianum and Trichoderma asperellum were evaluated against under in vitro condition. Culture disc of fungal bio-agents and pathogen were taken from the growing cultures and transferred to PDA contained in 80 mm petridishes on opposite sides approximately at one cm from the wall of the plate. Among these three bio-gents Trichoderma harzianum showed best mycelial growth inhibition of . |