A. Thoyajakshi Bai*1, Vibha1,Jayant Bhatt, Reena Nair, Anubha Upadhyay and H.L. Sharma
*1Department of plant pathology, College of agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh- 482004, India.
Email: thoyaja99@gmail.com
Received-05.01.2022, Revised-06.06.2022, Accepted-21.06.2022
Abstract: Tomato (Solanum lycopersicum) is the most popular vegetable crop grown worldwide and it ranks second most important solanaceous vegetable after potato (Pritesh & Subramanian, 2011). The production of tomato limited by foliar disease early blight which is generally associated with an air borne pathogen Alternaria species. The management of disease is challenging task as the chemical control through fungicides leading to the hazardous effect on human health and environment. The biocontrol potential of various Trichoderma specieswas tested under laboratory conditions to test the efficacy of various Trichoderma species such as Trichodermaviride, T. harzianum, T. virens, T. hamatam and T. aureoviride against Alternaria pathogen. The dual culture technique was followed to evaluate the efficiency of biocontrol agents. The observations were recorded up to 7 days after inoculation. The results showed that all the Trichoderma agents have significantly reduced the pathogen growth but comparatively among all the Trichoderma species, the T. viride has showed highest perecent inhibition of mycelial growth i,e., 85% followed by T. harzianum (77%), T. virens (75%), T. hamatam (68%). Whereas T. aureoviride has showed less percent inhibition of mycelial growth which is 60% at 7 DAI compared to control.
Keywords: Early blight, Alternaria, Biocontrol, Trichoderma
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