_____________________________________________________________________________________________________ *Corresponding author: E-mail: kumaramar05@gmail.com; Current Journal of Applied Science and Technology 39(8): 12-17, 2020; Article no.CJAST.56517 ISSN: 2457-1024 (Past name: British Journal of Applied Science & Technology, Past ISSN: 2231-0843, NLM ID: 101664541) Management of Leaf Blight Disease Caused by Alternaria polianthi in Tuberose M. R. Ravikumar 1 , D. K. Harish 2 , B. H. Kumara 3 and Amarendra Kumar 4* 1 College of Agriculture, Hanumanamatti, Ranebennure, Karnataka, India. 2 All India Coordinated Research Project for Dryland Agriculture (AICRPDA), Regional Agricultural Research Station, Vijayapura, Karnataka, India. 3 ICAR-KVK, Sirsi, Uttara Kannada, Karnataka, India. 4 Department of Plant Pathology, Bihar Agricultural University, Sabour, Bhagalpur, Bihar, India. Authors’ contributions This work was carried out in collaboration among all authors. Author MRR carried out the research work and wrote the protocol. Author DKH designed the study and supervise the work. Author BHK managed the literature searches and performed statistical analysis. Author AK managed the analysis and wrote the first draft of manuscript. All authors read and approved the final manuscript. Article Information DOI: 10.9734/CJAST/2020/v39i830587 Editor(s): (1) Dr. Aydin Unay, University of Aydin Adnan Menderes, Turkey. Reviewers: (1) Marco dos Santos Teixeira Pinto, Universidade Federal do Tocantins, Brasil. (2) Qi Cheng, Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, China. (3) Bhupen K. Baruah, Jagannath Barooah College, India. Complete Peer review History: http://www.sdiarticle4.com/review-history/56517 Received 24 February 2020 Accepted 30 April 2020 Published 02 May 2020 ABSTRACT Tuberose is an ornamental crop which is growing under tropical and sub-tropical areas. Recently, the incidence of leaf blight disease caused by Alternaria polianthi a fungal disease of tuberose is considered as a severe problem causing growth reduction and yield loss triggered by high temperature and humidity. Hence an investigation was carried out in farmer fields at Tumnakatti, Ranebennurtq in Karnataka, to study the bio-efficacy of different fungicides against leaf blight of tuberose. There were six chemicals viz., Tebuconazole 250 EC @ 0.1%, Difenconazole – 25% EC @ 0.1%, Propinoconazole 25% EC @ 0.1%, Hexaconazole 2% SC @ 0.1%, Mancozeb75 WP @ 0.25%, Chlorothalonil 75 WP @ 0.2%, were evaluated in tuberose cultivar Prajwal during kharif 2016 and 2017. Among the different fungicides, four sprays taken with Tebuconazole @ 0.1% at 15 days interval starting from onset of disease proved to be the most effective treatment and resulted Original Research Article