EFFICACY OF Trichoderma species FROM HILL BANANA AGRO-ECOSYSTEM AGAINST Fusarium oxysporum f.sp. cubense

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dc.contributor.advisorBhattacharyya, Ashok
dc.contributor.authorEZUNG, AJANBENI
dc.date.accessioned2023-10-12T16:08:51Z
dc.date.available2023-10-12T16:08:51Z
dc.date.issued2018
dc.description.abstractThe use of biological control agents (BCAs) has gained its popularity in agriculture as a way to decrease the application of synthetic pesticides. In the genus Trichoderma, a great number of fungal strains have been studied and utilized as BCAs. Exploration of biocontol agents from hill agro- ecosystem has not been intensified from the North Eastern states of India. Under the backdrop, the present investigation was carried out to explore potential Trichoderma spp. from the state of Nagaland. Eight numbers of Trichoderma spp. isolated from hill banana rhizospheric soils from different sub-divisions of the districts, Wokha, Kohima, and Dimapur had been culturally and morphologically characterized. In vitro antagonistic activity of all the eight isolates were carried out against Fusarium oxysporum f.sp. cubense (FoC), the causal organism of Fusarium wilt of banana. The study revealed that all the 8 isolates significantly inhibited the growth of FoC at different levels in all intervals of incubation (72, 120 and 168 hours). Of the isolates, three viz S37-4, S41G and S39 found to be most effective in inhibiting the mycelial growth of the test pathogen with 77.8 per cent, 75.0 per cent and 75.0 per cent respectively. The strains were identified as Trichoderma asperellum (S37-4) and Trichoderma virens (S41G and S39). Enzymatic assays of the isolates revealed significant increase in chitinase and β-1, 3 glucanase. Trichoderma asperellum (S37-4) was found with the maximum activity of cell wall degrading enzymes (CWDEs) i.e., chitinase (32.4 nkat/sec) and β-1, 3 glucanase (171.85 nkat/sec) in comaparison to other two isolates. An investigation was also carried out to study the production of volatile and non-volatile compounds by the Trichoderma spp. and found significant reduction of mycelial growth of the test pathogen was recorded. Trichoderma asperellum (S37-4) recorded the maximum inhibition of the growth of the test pathogen in both the cases of volatile (59.33%) and non-volatile (74.4%) compounds.
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810198771
dc.language.isoEnglish
dc.publisherAAU, Jorhat
dc.subPlant Pathology
dc.themeEFFICACY OF Trichoderma species FROM HILL BANANA AGRO-ECOSYSTEM AGAINST Fusarium oxysporum f.sp. cubense
dc.these.typeM.Sc
dc.titleEFFICACY OF Trichoderma species FROM HILL BANANA AGRO-ECOSYSTEM AGAINST Fusarium oxysporum f.sp. cubense
dc.typeThesis
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