In vitro Evaluation of Potential Bio Agents against Pyricularia setariae causing Blast of Foxtail Millet

Author: Anand, Mahesh M., Venkataravana P., Palanna K.B., Devaraja and Arpitha H.B.

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Abstract

Next to finger millet, foxtail millet is the most significant millet crop. The crop is prone to many biotic and abiotic stresses among them, leaf blast caused by Pyricularia setariae is an important disease causing considerable yield loss. The method of managing the disease with chemical fungicides has various drawbacks, such as the emergence of resistance, contamination of the environment, impact on non-target creatures, and potential health risks to humans. An attempt was made to evaluate potential fungal and bacterial bio agents collected from different places against Pyricularia setariae under laboratory conditions. Among them, Tv3 strain of Trichoderma viride showed highest mycelial growth inhibition (67.19 per cent). Next in the order was Th56 strain of T. harzianum with 66.79 per cent inhibition. Among the fungal bio agents, Th41, ThGJ16B, Th4B strain of T. harzianum were on par. Least inhibition of mycelial growth was observed in ThB2 strain of T. harzianum (56.91 per cent). Among the bacterial bio control agents evaluated, P42 strain of Bacillus velezensis exhibited highest percent of mycelial growth inhibition (33.72 per cent). Next in the order was P42 strain of Pseudomonas fluorescens (27.16 per cent) and least inhibition was observed in B. pumilis (21.07 per cent).

Keywords

Foxtail millet, Blast, Pyricularia setariae, Bio agents

Conclusion

By using the dual culture method, the biocontrol agents' effectiveness against P. setariae was assessed in vitro. The Tv3 strain of Trichoderma viride exhibited the highest percentage of suppression of mycelial growth (67.19%). Next in the order was Th56 strain of T. harzianum with 66.79 per cent inhibition. Among these Th41, ThGJ16B, Th4B strain of T. harzianum were on par with each other. ThB2 strain of T. harzianum showed the least amount of suppression of mycelial development (56.91 percent). The dual culture approach was used to test four distinct bacterial bio control agents against P. setariae. The P42 strain of Bacillus velezensis exhibited the highest percentage of suppression of mycelial growth (33.72%) of all the bacterial biocontrol agents that were examined. The P42 strain of Pseudomonas fluorescens (27.16 percent) came next in the ranking, whereas B. pumilis (21.07 percent) showed the least inhibition of mycelial growth.

References

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How to cite this article

Anand, Mahesh M., Venkataravana P., Palanna K.B., Devaraja and Arpitha H.B. (2023). In vitro Evaluation of Potential Bio Agents against Pyricularia setariae causing Blast of Foxtail Millet. Biological Forum – An International Journal, 15(10): 1240-1243.