By: Hunjan M.S., Lore J.S., Pannu P.P.S., Thind T.S.
Efficacy of some new fungicides namely trifloxystrobin + tebuconazole (Nativo 75 WG), tebuconazole (Folicur 25 EC), propiconazole (Tilt 25 EC), pencycuron (Monceren 250SC) and thifluzamide (Spencer 24SC) was evaluated against economically important rice diseases namely sheath blight (Rhizoctonia solani) and brown spot (Drechslera oryzae) under laboratory and field conditions under artificial inoculation conditions during kharif seasons 2008, 2009 and 2010. In addition, their efficacy was also tested against glume discoloration. Trifloxystrobin + tebuconazole @ 0.04% was found to be the most effective fungicide against these diseases, where the lowest mean disease severity was 5.2% for sheath blight, 5.1% for brown spot and 4.4% for glume discoloration as compared to 45.5%, 46.5% and 13.6% in untreated inoculated check plots of respective diseases. Next best fungicide observed was tebuconazole (Folicur 25 EC) @ 0.1%, effective against sheath blight (7.5%), brown spot (7.3%) and glume discoloration (4.2%). It was followed by propiconazole (Tilt 25 EC) @ 0.1%. Fungicide pencycuron (Monceren 250SC) was equally effective against sheath blight, but least effective against brown spot under laboratory as well as field conditions. Fungicides viz. trifloxystrobin + tebuconazole, tebuconazole, and propiconazole showed higher level of efficacy against R. solani and D. oryzae pathogens of above mentioned diseases under laboratory conditions also, however, thifluzamide (Spencer 24SC) was least effective against all the diseases under the both conditions.
Efficacy of some new fungicides namely trifloxystrobin + tebuconazole (Nativo 75 WG), tebuconazole (Folicur 25 EC), propiconazole (Tilt 25 EC), pencycuron (Monceren 250SC) and thifluzamide (Spencer 24SC) was evaluated against economically important rice diseases namely sheath blight (Rhizoctonia solani) and brown spot (Drechslera oryzae) under laboratory and field conditions under artificial inoculation conditions during kharif seasons 2008, 2009 and 2010. In addition, their efficacy was also tested against glume discoloration. Trifloxystrobin + tebuconazole @ 0.04% was found to be the most effective fungicide against these diseases, where the lowest mean disease severity was 5.2% for sheath blight, 5.1% for brown spot and 4.4% for glume discoloration as compared to 45.5%, 46.5% and 13.6% in untreated inoculated check plots of respective diseases. Next best fungicide observed was tebuconazole (Folicur 25 EC) @ 0.1%, effective against sheath blight (7.5%), brown spot (7.3%) and glume discoloration (4.2%). It was followed by propiconazole (Tilt 25 EC) @ 0.1%. Fungicide pencycuron (Monceren 250SC) was equally effective against sheath blight, but least effective against brown spot under laboratory as well as field conditions. Fungicides viz. trifloxystrobin + tebuconazole, tebuconazole, and propiconazole showed higher level of efficacy against R. solani and D. oryzae pathogens of above mentioned diseases under laboratory conditions also, however, thifluzamide (Spencer 24SC) was least effective against all the diseases under the both conditions.
Yangzhou pioneer chemical CO.,LTD
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