Assessment of Bioefficacy of Potential Fungicides and Biocontrol agents for Efficient Management of Blackgram Powdery Mildew

Author: Sapna*, Aswathanarayana D.S., Govindappa M.R., Mallikarjun Kenganal and Sreenivas A.G.

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Abstract

Though the plant disease management starts with cultural, mechanical, physical and biological methods but practically the chemical methods and use of biocontrol agents are in predominant practice to reduce the outbreak of diseases. Hence, to know the field efficacy of any new fungicide molecules, there is need to test chemical under laboratory condition which provides useful and preliminary information regarding efficacy of fungicides against pathogen within a shortest period of time. A experiment was conducted to evaluate the bioefficacy of fungicides and bioagents against Erysiphe polygoni causing powdery mildew in blackgram at Deparment of Plant Pathology, UAS Raichur. Among ten systemic fungicides, seven non systemic fungicides, nine combi fungicides and seven bioagents evaluated against E. polygoni, maximum mean inhibition of conidial germination was observed in tebuconazole 25 EC (98.67%), mancozeb 75 WP (88.62%), carbendazim 12 % + mancozeb 63 % WP (85.06%) and P. fluorescens

Keywords

Blackgram, Powdery mildew, Fungicides, Bioagents, Per cent disease index.

Conclusion

From the present study it was concluded that, among ten systemic fungicides, seven non systemic fungicides, nine combi fungicides and seven bioagents evaluated against E. polygoni under in vitro condition, maximum mean inhibition of conidial germination was observed in tebuconazole 25 EC, mancozeb 75 WP, carbendazim 12 % + mancozeb 63 % WP and P. fluorescens (Dharwad) respectively. Whereas in field condition two sprays of difenconazole at 0.1 per cent found best fungicide in management of powdery mildew of blackgram followed by propiconazole, tebuconazole and hexaconazole treatments.

References

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How to cite this article

Sapna, Aswathanarayana D.S., Govindappa M.R., Mallikarjun Kenganal and Sreenivas, A.G. (2021). Assessment of Bioefficacy of Potential Fungicides and Biocontrol agents for Efficient Management of Blackgram Powdery Mildew. Biological Forum – An Internatio