EFFECT OF WEED MANAGEMENT ON WEED DENSITY AND PRODUCTIVITY OF WHEAT (TRITICUM AESTIVUM L.) UNDER LATE SOWN CONDITION

Dharmendra Kumar Singh¹*, Vivek¹, R.K. Naresh¹, R.B. Yadav¹, B.P. Dhyani²

and Ravindra Kumar³

¹Department of Agronomy, Sardar Vallabhbhai Patel University of Agriculture & Technology,

Meerut, Uttar Pradesh, India

²Department of Soil Science, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut, Uttar Pradesh, India

³Department of Cell Biology, Sardar Vallabhbhai Patel University of Agriculture & Technology, Meerut, Uttar Pradesh, India

Received-02.07.2022, Revised-14.07.2022, Accepted-26.07.2022

Abstract: A field experiment was conducted at Crop Research Center, Sardar Patel University of Agriculture & Technology, Meerut, Uttar Pradesh during the Rabi season of 2019-20 and 2020-21 under late sown condition to assess the performance of post-emergence application of Pinoxaden, Isoproturon, Metsulfuron, Clodinafop-propargyl, 2-4,D and Iodosulfuron-methyl in combination with pre-emergence application of Pyroxasulfone on wheat (Triticum aestivum L.). The experiment laid out in Randomized Block Design (RBD) having three replication. The treatments comprised of Isoproturon @ 1000 g a.i. ha^-1+2,4-D @ 500 g a.i. ha^-1 as PoE T_1, Pyroxasulfone @127 g a.i. ha^-1 as PE T_2, Pyroxasulfone @127 g a.i. ha^-1 as PE + 1 HW T_3, Pyroxasulfone @127 g a.i. ha^-1 PE fb sulfosulfuron + metsulfuron (RM) @ 32 g a.i. ha^-1 PoE T_4, Pyroxasulfone @127 g a.i. ha^-1PE + Pinoxaden @ 40g a.i. ha^-1 as PoE T_5, Pinoxaden @ 40g a.i. ha^-1 as PoE T_6, Pinoxaden @ 40g a.i. ha^-1 as PoE +1 HW T_7, Pinoxaden + clodinafop-propargyl  @ 40 g a.i. ha^-1 as PoE T_8, Pyroxasulfone @127 g a.i. ha^-1 as PE + Mesosulfuron-methyl + Iodosulfuron-methyl sodium @ 30+6 gram a.i. ha^-1 PoE T₉,Mesosulfuron-methyl + Iodosulfuron-methyl sodium @ 30+6 gram a.i. ha^-1 PoE T₁₀, Weed free T₁₁ and Control (Unweeded check) T₁₂. Treatments effects were evaluated in terms of weed density and productivity of wheat. The results revealed that the maximum weed density at 60 and 90 DAS in Pyroxasulfone @ 127 g a.i. ha^-1 as PE + Mesosulfuron-methyl + Iodosulfuron-methyl sodium @ 30+6 gram a.i. ha^-1PoE T₉ was found at par with Pyroxasulfone @ 127 g a.i. ha^-1 PE fb sulfosulfuron + metsulfuron (RM) @ 32 g a.i. ha^-1 PoE T₄, Mesosulfuron-methyl + Iodosulfuron-methyl sodium @ 30+6 gram a.i. ha^-1PoE T₁₀, Pinoxaden + clodinafop-propargyl  @ 40 g a.i. ha^-1 as PoE T₈ and Pyroxasulfone @ 127 g a.i. ha^-1PE + Pinoxaden @ 40g a.i. ha^-1 as PoE T₅ and significantly higher than the rest of treatments during both the year. The results also revealed that among the different weed management treatments the highest grain yield (46.5 & 48.2 q ha^-1) was obtained under weed free treatment, which was at par with (45.3 & 46.4 q ha^-1) with the application of Pyroxasulfone @127 g a.i. ha^-1 as PE + Mesosulfuron-methyl + Iodosulfuron-methyl sodium @ 30+6 gram a.i. ha^-1PoE T₉ and Pyroxasulfone @127 g a.i. ha^-1 PE fb sulfosulfuron+metsulfuron (RM) @ 32 g a.i. ha^-1 PoE T₄ (43.9 & 45.3 q ha^-1) during both the years. Application of Pyroxasulfone @127 g a.i. ha^-1 as PE + Mesosulfuron-methyl + Iodosulfuron-methyl sodium @ 30+6 gram a.i. ha^-1PoE found significantly lowest weed density and higher productivity of wheat crop due to non availability of laborers.

Keywords: Wheat, Herbicide, weed dynamics, productivity, profitability

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