Control of Seed-Borne Fungi of Rice by Aspergillus and Trichoderma

International Journal of Agriculture & Environmental Science
© 2018 by SSRG - IJAES Journal
Volume 5 Issue 1
Year of Publication : 2018
Authors : Subash Chandra Deb, Abul Khair
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Subash Chandra Deb, Abul Khair, " Control of Seed-Borne Fungi of Rice by Aspergillus and Trichoderma," SSRG International Journal of Agriculture & Environmental Science, vol. 5,  no. 1, pp. 34-39, 2018. Crossref, https://doi.org/10.14445/23942568/IJAES-V5I1P106

Abstract:

Seed-borne fungi cause enormous losses in rice production. Six antagonistic fungi comprising three species of Trichoderma viz.T. viridae, T. harzianum, T. hamatum, and three species of Aspergillus viz. A. flavus, A. niger, A. terreus, were used against five important rice pathogenic fungi (i.e. Bipolaris oryzae, Curvularia lunata, Fusarium moniliformae, Sarocladiumoryzae and Trichocoins padwickii) for the purpose of biological control. The highest radial growth inhibition exhibited by A. niger and T. harzianum against Sarocladium oryzae (48.07%) and Trichocoins padwickii (65.40%) respectively. A. terreus produced distinct inhibition zone against all five rice pathogens in dual culture. The use of culture filtrates of antagonist successfully reduced growth of rice pathogenic fungi. Among the three concentrations (5%, 10%, and 20%) used, maximum radial growth inhibition was recorded in case of highest concentration (20%) of culture filtrate. Maximum inhibition recorded against Trichoconis padwickii, which was 68.58% and 85.35% by A. niger and T. harzianum respectively. Among the six antagonists, T. harzianum was found to be best in radial growth inhibition and Sarocladium oryzae was the susceptible one than any other tested fungi.

Keywords:

Seed-borne fungi, Aspergillus, Trichoderma, Biological control, Dual culture, Culture filtrate, radial growth, inhibition zone

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