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Biofumigation based integrated disease management against Athelia rolfsii (syn. Sclerotium rolfsii Sacc.) induced collar rot disease of betelvine (Piper betle L.)

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Abstract

Collar rot of betelvine (Piper betle L.) is an important disease in India, caused by Athelia rolfsii (Curzi) C.C. Tu and Kimbr. (syn. Sclerotium rolfsii Sacc.) Management of this soil borne pathogen is highly challenging in the shade house (boroj) condition, where betelvine is grown as a perennial climber. As betel leaves are consumed raw, application of chemical fungicides is highly restricted to safeguard human health. The present study compared various integrated disease management packages by suitable combination of biofumigation, biocontrol and soil solarization strategies and evaluated the best package at farmers’ field condition. The treatment combination of “biofumigation with 0.7 kg m−2 green biomass of Indian mustard cv. Pusa Mahak” + “curing of soil by resting for 5 months in the form of heap followed by soil solarization for 30 days” + “biocontrol with 10 g m−2 Trichoderma sp. T-Nam colonized whole rice grain” was found to be the most economical and effective disease management option with highest leaf yield in the experimental plot. This package resulted in 76.82% reduction in collar rot incidence, 29.94% increase in leaf yield and 41.45% increase in net income during March-June crop cycle, in farmers’ field condition, when compared to the Farmers’ Practice (soil drench with 4 L m−2 0.25% Blitox 50 W). Trichoderma was found to be highly tolerant to the biofumigation volatiles, which maintained a good soil population (32.78 × 103 CFU g−1 soil) in the farmers’ plots adopting integrated disease management. Biofumigation with Indian mustard and biocontrol with local isolate of Trichoderma offered an economical management of the collar rot disease in betelvine, without compromising the crop yield and the population of Trichoderma spp. in soil.

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The data and material used during the current study are available from the corresponding author on reasonable request.

Abbreviations

BCR:

Benefit-cost ratio

CFU:

Colony forming unit

DI:

Disease incidence

FP:

Farmer’s Practice

IDM:

Integrated Disease Management

₹:

Indian Rupee

cv.:

Cultivar

syn.:

Synonym

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Acknowledgements

The authors are thankful to Ramkrishna Ashram Krishi Vigyan Kendra for allowing to conduct the research work.

Funding

This work did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Contributions

All authors designed the experiments. PKG and SD coordinated and performed the field experiments, analysis of results and manuscript drafting. PKG and BM performed the farmers’ field demonstration, data interpretation and wrote the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Prabir Kumar Garain.

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Garain, P., Mondal, B. & Dutta, S. Biofumigation based integrated disease management against Athelia rolfsii (syn. Sclerotium rolfsii Sacc.) induced collar rot disease of betelvine (Piper betle L.). J Plant Pathol 104, 1027–1038 (2022). https://doi.org/10.1007/s42161-022-01129-8

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  • DOI: https://doi.org/10.1007/s42161-022-01129-8

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