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All Journal International Journal of Applied Biology
C., Bigyan K.
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Agriculture, Biological Sciences & Forestry Automotive Engineering Energy Environmental Science

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Biological Control of Fungal Phytopathogens with Trichoderma harzianum and Its Fungicidal Compatibility Poudel, Sudeep; Khanal, Pratit; C., Bigyan K.; Pokharel, Sadikshya; Gauli, Sandesh
International Journal of Applied Biology Vol. 7 No. 1 (2023): International Journal of Applied Biology
Publisher : Hasanuddin University

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Abstract

Excessive synthetic fungicide use reduces soil's antagonistic population, allowing soil-borne plant pathogens to cause significant global losses. Despite high fungicide application, plant diseases persist, harming the ecosystem. Trichoderma spp, an eco-friendly plant symbiont, can serve as an alternative biocontrol agent. This study evaluated Trichoderma harzianum's antagonistic effect against fungal pathogens and its compatibility with fungicides under in-vitro  using a Completely Randomized Design with four replications per treatment. Trichoderma harzianum showed high antagonistic activity for Alternaria brassicicola (70.35%), Fusarium solani (70.82%), Helminthosporium sorokinana (66.55%), Rhizoctonia solani (78.58%), Sclerotium rolfsii (92.53%). Among the tested fungicides, Copper oxychloride and Mancoxeb at 400 ppm showed maximum compatibility with growth inhibition percent (GIP) of 2.41% and 7.91%, respectively, after 60 hours of incubation. Fungicides viz., Carbendazim, Hexaconazole, and Carbendazim+Mancozeb at all concentrations aren’t compatible with 100% GIP throughout the experiment, and for Metalaxyl+Mancozeb, high growth inhibition percent was observed ranging from 42.77% to 78.40% making it incompatible. In integrated disease management, compatible fungicides at recommended doses can be used in combination with T. harzianum.  
Co-Authors Gauli, Sandesh Khanal, Pratit Pokharel, Sadikshya Poudel, Sudeep