African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6638

Full Length Research Paper

Foliar application of fungicides for the management of brown spot disease in rice (Oryza sativa L.) caused by Bipolaris oryzae

Vishal Gupta1*, Naveed Shamas1, V. K. Razdan1, B. C. Sharma2, Rishu Sharma1, Kavaljeet Kaur1, Ichpal Singh1, Dolly John3 and Atul Kumar4
1Division of Plant Pathology, Faculty of Agriculture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu,Chatha-180 009, Jammu, India. 2Division of Agronomy, Faculty of Agriculture, Sher-e-Kashmir University of Agricultural   Sciences and Technology of Jammu, Chatha-180 009, Jammu, India. 3Department of Agriculture, Kathua -184101, India. 4IARI Regional Station, Pusa, Samastipur, Bihar- 848125, India.
Email: [email protected]

  •  Accepted: 24 May 2013
  •  Published: 04 July 2013

Abstract

Major rice growing areas of Jammu sub-tropics (Jammu, Samba and Kathua Districts) were surveyed to ascertain the status and distributions of brown spot of rice during 2011 to 2012. The disease was reported from all the areas with area under brown spot progress curve (AUBSPC) ranging between 3150 and 3560, 3025.00 and 3100, and 2921 and 31050 in Jammu, Kathua and Samba districts, respectively. Under laboratory conditions, seven fungicides (propiconazole, hexaconazole, tricyclazole, carbendazim, triadimefon, mancozeb and azoxystrobin) were tested at 50, 100, 150, 200 and 250 ppm. Out of different fungicides, propiconazole was most effective with maximum inhibition of 97% at 250 ppm concentration. Under field conditions, three rice varieties viz., Basmati-370, Jaya and PC-19 were used for testing different fungicides at 0.1% concentration during 2011 to 2012 and application of propiconazole significantly reduced the disease severity (69, 73 and 70) and increased the grain yield (19, 12 and 21) of all the varieties as compared to their respective controls. It was concluded that timely spray of propiconazole reduce the disease severity and thereby increase the yield of the rice.

 

Key words: Brown spot, Bipolaris oryzae, severity, fungicides, management.