Evaluation of Different Management Practices against Alternaria Leaf Blight Disease of French Bean (Phaseolus vulgaris L.) caused by Alternaria alternata

Author: Shivanand Hongal, Nagesh, Gurumurthy S.B., H.P. Maheswarappa, Sudheesh Kulkarni, Abdul K.M., Sowjanya T.V., Divya S. Bhat and Rahul Phatak

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Abstract

French bean (Phaseolous vulgaris L.) is a substantial food crop utilized as a pulse and green vegetable crop, belongs to family Fabaceae. Alternaria leaf blight disease is one among the major constraints of crop production incited by Alternaria alternate resulting into significant yield loss as well as in quality of pods. In this context, Experiments was laid out in randomized block design with five replications for three consecutive years during 2019-2022. Evaluated different treatment of farming systems such as natural farming, organic farming, chemical farming and recommended package of practices (UHS, Bagalkot) for their bio efficacy to combat the disease. A pooled severity of three years analyzed, among the management practices, chemical farming comprises mancozeb 75% WP@2gm/lit. was found effective in managing the disease (3.45% PDI) and showed consistent trend for all three years of experimental period which is followed by recommended package of practice comprises propiconazole 25%EC @1ml/l (6.26% PDI), organic farming comprises of talk-based Trichoderma harzianum 10g/lit (7.22% PDI). Natural farming comprises sour butter milk (5lit. per 200 lit. of water) found least effective to combat disease and recorded maximum disease severity (12.22% PDI) at 45DAS. Although chemical farming can effectively control the disease but it will lead to serious risk on human health and environmental hazards. Therefore, organic and natural farming are an alternative approach that are eco-friendly and economically viable against Alternaria leaf blight disease management.

Keywords

French bean, Natural farming, Chemical farming, Alternaria, Trichoderma

Conclusion

Among the evaluated management practice, spraying of Propiconazole 25%EC @1ml/l which is followed by Mancozeb 75%WP @2gm/lit. found effective because of specific mode of action by combi/solo fungicides. Foliar application of Tichoderma harzianum @10gm/lit. is an ecofriendly and alternative approach to combat disease. Foliar application of sour butter milk found least effective against disease.

References

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How to cite this article

Shivanand Hongal, Nagesh, Gurumurthy S.B., H.P. Maheswarappa, Sudheesh Kulkarni, Abdul K.M., Sowjanya T.V., Divya S. Bhat and Rahul Phatak (2023). Evaluation of Different Management Practices against Alternaria Leaf Blight Disease of French Bean (Phaseolus vulgaris L.) caused by Alternaria alternata. Biological Forum – An International Journal, 15(4): 422-426.