Vol. 12, Issue 6 (2023)

Author(s):
Akarsh SV, Dr. JA Hosmath, Dr. TT Bandiwaddar and Dr. MG Palakshappa

Abstract:
A field experiment was conducted in Main Agricultural Research Station, University of Agricultural Sciences, Dharwad during rabi 2019 to study the management of weeds in chickpea + linseed (2:1) intercropping through pre and post emergence herbicides. The experiment was replicated thrice in split plot design with sole chickpea, sole linseed and chickpea + linseed (2:1) intercropping as main plots and pendimethalin 30 EC at 1 kg ha^-1 (PE), imazethapyr 10 SL at 50 g ha^-1 (EPoE) at 20 DAS, pendimethalin 30 EC at 1 kg ha^-1 (PE) fb imazethapyr 10 SL at 50 g ha^-1 (EPoE) at 20 DAS, weed free and weedy check as sub plot treatments. Chickpea + linseed (2:1) intercropping (4.80 m^-2 and 60.18% respectively) showed on par observation with sole chickpea (4.76 m^-2 and 62.40% respectively) for weed density and weed control efficiency at 60 DAS. However, intercropping (1126 kg ha^-1, ₹ 30307 ha^-1 and 2.05 respectively) recorded significantly higher chickpea equivalent yield, net return and B C ratio than sole chickpea (1072 kg ha^-1, ₹ 22885 ha^-1 and 1.79 respectively) and sole linseed (1043 kg ha^-1, ₹ 24201 ha^-1 and 1.93 respectively). Among weed management practices, sequential application of pendimethalin 30 EC at 1 kg ha^-1 (PE) fb imazethapyr 10 SL at 50 g ha^-1 at 20 DAS (EPoE) (4.46 m^-2, 86.51%, 1254 kg ha^-1, ₹ 35666 ha^-1 and 2.40 respectively) showed significantly lower weed density, weed control efficiency, chickpea equivalent yield, net return and B C ratio than pendimethalin 30 EC at 1 kg ha^-1 (PE) (4.67 m^-2, 59.23%, 1091 kg ha^-1, ₹ 28312 ha^-1 and 2.12 respectively), imazethapyr 10 SL at 50 g ha^-1 (EPoE) at 20 DAS (5.11 m^-2, 51.38%, 991 kg ha^-1, ₹ 24434 ha^-1 and 1.98 respectively) and weedy check (7.67 m^-2, 0.00%, 605 kg ha^-1, ₹ 6558 ha^-1 and 1.28 respectively).