Vol. 10, Issue 11 (2021)

Author(s):
Mausmi Rastogi, Vivek, RK Naresh, Shipra Yadav, Shivangi, M Sharath Chandra, Himanshu Tiwari and Pradeep Kumar Singh

Abstract:
A field experiment was conducted during rabi season (2020-21), to assess the performance of post-emergence application of Imazethapyr in combination with pre-emergence application of Oxyfluorfen on chickpea (Cicer arietinum L.). The treatments comprised of Control (Weedy check) T_1, Weed free T_2, one hand weeding 25 DAS T_3, two hand weeding 25 and 50 DAS T_4, Oxyfluorfen 100 g a.i./ha Pre emergence T_5, Oxyfluorfen 100 g a.i./ha Pre emergence + one hand weeding 25 DAS T_6, Imazethapyr 50 g a.i./ha Post emergence (25 DAS) T_7, Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS T_8, Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS T₉ and Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS T₁₀ respectively was laid down in Randomized Block Design (RBD) with three replications and their treatments effects were evaluated in terms of weed dynamics growth, yield, Nutrient uptake and profitability of chickpea. The results revealed that the maximum weed control efficiency at 60 and 90 DAS in Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS was found at par with Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS and significantly higher than the rest of treatments. Among the different integrated weed management treatments the significantly highest grain yield (24.8 q ha^-1), total NPK content and uptake by grain and straw was recorded in weed free treatment followed by (23.7 q ha^-1) with the application of Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS which were at par (22.6 q ha^-1) with the application of Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS and the lowest total NPK content and uptake was found with the application of Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS respectively. The highest net monetary return (₹ 103102 ha^-1) and B: C ratio (2.67) was obtained with weed free treatment among all the treatments, while among herbicides treatments the highest net monetary return (₹ 100102 ha^-1) and B:C ratio (2.82) was obtained with Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS which was found at par with Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS. Thus, it concluded that the Oxyfluorfen 100 g a.i./ha Pre emergence + Imazethapyr 50 g a.i./ha 25 DAS + one hand weeding 50 DAS found to be better for higher productivity and profitability of chickpea crop due to non availability of laborers.