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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2020.9(5): 646-655
DOI: https://doi.org/10.20546/ijcmas.2020.905.071


Assessment of fungicide spray schedules against turcicum leaf blight of maize caused by Exserohilum turcicum (Pass.) Leonard and Suggs
P. Meghana*, S. I. Harlapur, P.V. Patil and R. M. Kachapur
Department of Plant Pathology, College of Agriculture, Dharwad, University of Agricultural Sciences, Dharwad- 580005, Karnataka, India
*Corresponding author
Abstract:

Turcicum leaf blight (TLB) caused by Exserohilum turcicum is a major foliar disease affecting maize.  The aims of  this study were to: assess tebuconazole (folicure 250 EC) spray schedules on disease severity of TLB, determine optimum growth stage of the crop for tebuconazole spray and amount of spray solution of fungicide to be applied for cost effective TLB management. The effect of fungicide spray schedules on TLB management was assessed in a field experiment during kharif 2018 at MARS, Dharwad. In this experiment, ten treatments were imposed with fungicide tebuconazole 250 % EC @ 0.1 % foliar spray at different growth stages of the crop irrespective of disease occurrence besides a treatment with unsprayed control. Data were recorded on disease severity. Eight time severity scores were used to calculate area under disease progress curve (AUDPC). Grain yield and yield components were measured after harvest. Finally economics of the treatments were carried out. The results of present investigation revealed that the disease severity was significantly reduced by different spray schedules. However, combined spray at the onset of disease and spray before tasseling (T8) was found effective in controlling TLB, which recorded significantly lowest disease severity (28.52 per cent) with 57.47 per cent reduction over control and AUDPC value of 915.75.


Keywords: Disease severity, Exserohilum turcicum, Fungicide spray schedules, Maize, Turcicum leaf blight
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How to cite this article:

Meghana, S. P., S. I. Harlapur, P.V. Patil and Kachapur, R. M. 2020. Assessment of fungicide spray schedules against turcicum leaf blight of maize caused by Exserohilum turcicum (Pass.) Leonard and Suggs.Int.J.Curr.Microbiol.App.Sci. 9(5): 646-655. doi: https://doi.org/10.20546/ijcmas.2020.905.071