National Academy of Agricultural Sciences (NAAS)
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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 |
Purple blotch disease of onion (Allium cepa L.) is an important foliar disease which is incited by a fungus Alternaria porri. This fungus is also a pathogen of leek, garlic and chive. It is responsible for causing severe yield losses ranging from 2.5% to 97% in both bulb and seed crop of onion (Gupta and Pathak, 1998). Though India is the second largest producer of onion in the world but it it not sufficient enough to meet the demands for both domestic requirement and export. The present experiment was conducted in a randomized block design with four replications. Nine fungicides were evaluated in vitro against the pathogen Alternaria porri and the percent inhibition was estimated during the experimentation. The percent inhibition showed that Propiconazole (0.2%), Tebuconazole (0.15%), Carbendazim (0.1%), Hexaconazole (0.2%) and Carbendazim + Mancozeb (0.15%) reduces the growth of the fungus completely (100%). Metalaxyl 4% w/w+ Mancozeb 64% w/w reduces the growth of the fungus upto 90%. Tricyclazole 75% WP and Azoxystrobin 23% SC reduces the fungal growth upto 83% and least reduction of fungal growth observed by Copper oxychloride 50% WP upto 67%.
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