Weed management in wheat by pre-emergence and pre-mix post-emergence combinations of herbicides

摘要

Field investigation was carried out at Akola, Maharashtra during three consecutive Rabi season of 2016-2017, 2017-18 and 2018-19 to assess the efficacy of herbicide combinations in wheat. Treatments comprised of twelve different pre-emergence and pre-mix combinations of post-emergence herbicides. Results revealed that pre-mix post-emergence application (PoE) of clodinafop propargyl + metsulfuron-methyl 0.06 + 0.004 kg/ha at 35 DAS and sulfosulfuron + metsulfuron-methyl 0.03 + 0.002- kg/ha at 35 DAS gave higher weed control efficiency (90 and 80) and lower weed index (2.85 and 2.98). These proved as effective as weed free treatment and recorded significantly higher grain yield of 4.37 and 4.36 t/ha, respectively over rest of the treatments. The highest net monetary returns and B:C ratio (IR/s64356/ha, 3.69) were registered with application clodinafop-propargyl + metsulfuron-methyl 0.06 + 0.004 kg/ha at 35 DAS followed by sulfosulfuron + metsulfuron-methyl 0.03 + 0.002 kg/ha at 35 DAS. (IR/s62162/ha and 3.40).