Field evaluation of fungicides againstPuccinia purpurea Cooke. causing sorghum rust

SHRIDEVI B  TEGGINAHALLI; S. N.  CHATTANNAVAR; SHAMARAO   JAHAGIRDAR; P. U.   KRISHNARAJ

doi:10.61475/jfm.v35i01.123

SHRIDEVI B TEGGINAHALLI Department of Plant PathologyCollege of Agriculture, University of Agricultural SciencesDharwad -580 005, Karnataka, India
S. N. CHATTANNAVAR Department of Plant PathologyCollege of Agriculture, University of Agricultural SciencesDharwad -580 005, Karnataka, India
SHAMARAO JAHAGIRDAR Department of Plant PathologyCollege of Agriculture, University of Agricultural SciencesDharwad -580 005, Karnataka, India
P. U. KRISHNARAJ Department of Plant PathologyCollege of Agriculture, University of Agricultural SciencesDharwad -580 005, Karnataka, India

DOI: https://doi.org/10.61475/jfm.v35i01.123

Keywords: Management, Rust severity, Sorghum

Abstract

Rust of sorghum caused by Puccinia purpurea Cooke. isbecoming a serious problem in rabi sorghum, results in severe lossesin grain and fodder yield. The present study was carried out duringrabi 2020-21 at Main Agricultural Research Station, University ofAgricultural sciences, Dharwad on evaluation of fungicides formanagement of sorghum rust. The results revealed that the minimumrust severity after first spray was recorded in the treatmenttrifloxystrobin 25 % + tebuconazole 50 % WG (12.10 %) followedby hexaconazole 5 % + validamycin 2.5 % SC (14.07 %) with 65.29and 59.41per cent reduction in disease over control, respectively.Maximum grain and fodder yield was recorded in trifloxystrobin 25% + tebuconazole 50 % WG (11.27 q/ha and 61.02 q/ha, respectively)followed by hexaconazole 5 % + validamycin 2.5 % SC (10.83 q/haand 58.83 q/ha, respectively). However, the highest B:C ratio of 1.72was recorded in hexaconazole 5 % + validamycin 2.5 % SC followedby hexaconazole 5 % EC (1.63).