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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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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 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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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.2018.7(1): 20-25
DOI: https://doi.org/10.20546/ijcmas.2018.701.003


Effect of Fungicides on Lesion Expansion of Late Blight of Potato
Saidul Islam1*, Rahamatulla Middya1, Bholanath Mondal1 and Dinesh Chandra Khatua2
1Department of Plant Protection, Palli-Siksha Bhavana (Institute of Agriculture), Visva-Bharati, Sriniketan 731236, India
2Department of Plant Pathology, Bidhan Chandra Krishi Viswavidyalaya,
Mohanpur, Nadia, India
*Corresponding author
Abstract:

The experiment was conducted in field condition during 2015-2016 at Birbhum district, the Lateritic Red and Undulating Agro-climatic region of West Bengal to find out effect of fungicides against lesion expansion of late blight of potato (cv. Kufri Jyoti). Typical late blight lesions on leaves were identified and tagged in the field. Water suspension of different fungicides (0.1% of commercial formulation) was sprayed separately on the infected leaves with a hand sprayer. Size of the individual spot was measured before and 96 hours after spraying. Suitable control was maintained without spraying of fungicide. Per cent change of infected area was calculated 96 hours after spraying. Infected area was increased after 96 hours both in control and treatments. Experimental fungicides could not prevent lesion expansion totally. But four fungicides (Ethaboxam 40% SC, Chlorothalonil 33% + Metalaxyl 3.3% SC, Chlorothalonil 75% WP and Azoxystrobin 23% SC) reduced the lesion expansion significantly. There was 453.44% increase in the lesion size over the original lesion in control after 96 hours. Increase in lesion size was 478.94% in Carbendazim 50% WP. Significantly less increase in lesion size was recorded in Ethaboxam 40% SC (57.34%) followed by Chlorothalonil 33% + Metalaxyl 3.3% SC (65.17%), Chlorothalonil 75% WP (82.01%). and Azoxystrobin 23% SC (96.52%).


Keywords: Late blight, Potato, Fungicide, Management
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How to cite this article:

Saidul Islam, Rahamatulla Middya, Bholanath Mondal and Dinesh Chandra Khatua. 2018. Effect of Fungicides on Lesion Expansion of Late Blight of Potato.Int.J.Curr.Microbiol.App.Sci. 7(1): 20-25. doi: https://doi.org/10.20546/ijcmas.2018.701.003