Weed management in blackgram and its residual effect on succeeding mustard crop Upasani R.R.*,1, Barla Sheela1, Hassan Deeba1, Puran A.N.1 1Department of Agronomy, Birsa Agricultural University, Ranchi, Jharkhand, 834 006 *Corresponding author: upasani.ravikant@gmail.com
Abstract The investigation was undertaken at Birsa Agricultural University, Ranchi during Kharif, 2014 and 2015. The experiment was laid out in randomized block design with sixteen treatments replicated thrice. The treatments comprised of pre- and post-emergence of imazathepyr 50, 70 and 80 g/ha; pre- and postemergence of ready mix imazethapyr 35% + imazamox 35% (Odyssey) 50, 70 and 80 g/ha; pre-emergence (PE) of pendimethalin 1000 g/ha, ready mix imazethapyr 2% + pendimethalin 30% (Vallor) 1000 g/ha, hoeing twice and weedy check. Post-emergence (PoE) of imazethapyr 35% + imazamox 35% 70 g/ha similar to PE of imazethapyre 80 g/ha, imazethapyr 35% + imazamox 35% 70 g/ha, imazethapyr 35% + imazamox 35% 80 g/ha, pendimethalin 1000 g/ha and PoE of imazethapyr 80 g/ha, imazethapyr 35% + imazamox 35% 50 g/ha recorded 69.86 and 126.72% significantly higher seed (1.12 t/ha) and straw yield (2.33 t/ha) respectively, 168.63% higher net return (‘ 24,126/-) and 192.41% higher B:C ratio (2.31) compared to weedy check owing to 87.29 and 86.08% weed control efficiency. Top Keywords Blackgram, Imazethapyr, Phytotoxicity, Ready mix, Weed management. Top |