IMPACT OF RESISTANCE INDUCERS AGAINST PURPLE BLOTCH DISEASE OF ONION UNDER FIELD CONDITIONS

R. DAS¹*
¹Department of Plant Pathology, Regional Research Sub-Station (Red & Laterite Zone), Sekhampur, Birbhum, 731129, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, 741252, West Bengal, India
* Corresponding Author : rajudas05@gmail.com

Received : 27-09-2023     Accepted : 27-10-2023     Published : 30-10-2023
Volume : 15     Issue : 4       Pages : 2029 - 2031
Int J Microbiol Res 15.4 (2023):2029-2031

Keywords : Purple blotch disease, Management, Resistance inducers, Onion
Academic Editor : Dr A. J. Deshmukh, Dr Monuj Kumar Doley, Dr Nitin Govindprabhu Suradkar, Dr Devangee P. Shukla
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Plant Pathology, Regional Research Sub-Station (Red & Laterite Zone), Sekhampur, Birbhum, 731129, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, 741252, West Bengal, India
Author Contribution : Sole Author

Purple blotch disease has become a very serious disease of onion causing considerable yield loss in onion production. In the absence of resistant cultivars, management of Purple blotch disease has relied principally on application of synthetic fungicides. The present study evaluated the efficacy of resistance inducers on purple blotch disease and investigated the effects on the yield of onion bulbs. The field experiment used a randomized block design, with five treatments and four replications in subtropical climatic condition of West Bengal at Regional Research Sub-Station (R & L Zone), Bidhan Chandra Krishi Viswavidyalaya, Sekhampur, Birbhum, West Bengal, India during Rabi, 2021 and Rabi, 2022. Among the plant inducers, two foliar sprays at 30 days after planting and 60 days after planting with Chitosan @ 0.1 % was best followed by Salicylic acid @ 150 ppm and Benzoic acid @ 0.15 % to manage the purple blotch disease of onion. The findings of the present study demonstrated a promising approach of management of purple blotch disease of onion with resistance inducers

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