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Herbicide Use Strategy and Its Economy as a Weed Management Option in Wheat Varieties

M.G. Mostafa
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

M.F. Karim
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

H.M.M.T. Hossain
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh

Abstract/ Executive Summary:

Weed pressure is an additional threat to high-temperature stressed wheat crops for their optimum production. A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during Rabi 2017-2018 to assess the response of wheat varieties to different weed managements and its economical viability. As such three varieties i.e. BARI Gom-28, BARI Gom-29, and BARI Gom-30 along with five weed managements viz. control (no weeding), two hands weeding at 20 and 40 DAS, Panida 33EC (Pendimethalin) @ 2000 ml ha^-1 spray at 5 DAS as pre-emergence, Affinity 50.75 WP (Isoproturon) @ 1500 g ha^-1 spray at 25 DAS as post-emergence and Panida 33EC (Pendimethalin) @ 2000 ml ha^-1 at 5 DAS + Affinity 50.75 WP (Isoproturon) @ 1500 g ha-1 at 5 & 25 DAS were treatment variables tested under split-plot design. Cynodon dactylon, Cyperus rotundus, Echinochloa colona, Eleusine indica, Chenopodium album, Alternanthera philoxeroides, Brassica kaber, Leliotropium Indicum, Vicia sativa, etc. were the major weeds as determined based on their field intensity. Results revealed that BARI Gom-30 out-yielded other varieties with the highest grain yield (3.01 t ha^-1). Pre-emergence application of Panida 33EC at 5 DAS proved as suitable weed management compared to other methods. BARI Gom-30 in combination with Panida 33EC @ 2000 ml ha^-1 spray at 5 DAS as pre-emergence gave higher yield and yield attributes while BARI Gom-28 under no weeding check showed lower grain yield (2.09 t ha^-1). Economically maximum gross return (Tk.75761.52ha^-1), net income (Tk.21775.92ha^-1), and BCR (1.41) were associated with Panida 33EC treatment when minimum values were obtained in the control plot (no weeding). So, the application of pre-emergence herbicide, Panida 33EC might be economically viable weed management ensuring a higher yield in wheat cultivation.

Keywords: Weed, Pre-emergence, Herbicide, Economic management, Wheat

Location: Sher-e-Bangla Agricultural University, Dhaka-1207

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Pest Management

Commodity: Weed management, Wheat, Herbicide

Objectives:

To examine the influence of pre and post-emergence herbicides either individual or double-action over the convention in the potential yields of some modern wheat varieties along with economic validation.

Methodology:

The field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka-1207 during Rabi 2017-2018. The location of the experimental site is 90º37´ E longitude and 23º77´ N latitude. The soil belongs to the Modhupur tract (AEZ No. 28). The experiment consisted of two factors as a) Factor A: Varieties (3) i.e. V₁= BARI Gom-28, V₂= BARI Gom-29, V₃= BARI Gom-30 and b) Factor B: Weed managements (5) viz. W₀ = No weeding (Control), W₁ = Two hands weeding at 20 DAS and 40 DAS, W₂ = Panida 33EC (Pendimethalin) @ 2000 ml ha^-1 spray at 5 DAS (pre-emergence), W₃ = Affinity 50.75WP (Isoproturon) @ 1500 g ha^-1 spray at 25 DAS (post-emergence), W₄ = Panida 33EC (Pendimethalin) @ 2000 ml ha^-1 spray at 5 DAS + Affinity 50.75WP (Isoproturon) @ 1500 g ha^-1 spray at 25 DAS. The experiment was laid out in a split-plot design with three replications where the variety was placed in the main plot and weed management in a subplot. Fertilizers were applied following BARI recommendations as urea, TSP, MoP, and gypsum @ 220, 150, 50, and 120 kg ha^-1, respectively. The whole amount of all fertilizers and two-third amount urea was applied at the time of final land preparation and thoroughly incorporated with soil. Rest urea was added at the crown root initiation (CRI) stage (21 DAS). There were negligible infestations of insect pests during the crop growth period. Only mole cricket and cutworm invaded the crop during the early growing stage and were controlled by spraying Diazinon 60EC. Data of yield and yield contributing parameters were collected at the final harvest. Analysis of variance was done following MSTAT-C. The mean differences among the treatments were adjusted by the least significant difference (LSD) at a 5% level of significance (Gomez and Gomez, 1984).

Source of Information: Bangladesh Agron. J. 2020, 23(2): 119-125

Article Link (Online Journal): DOI: https://doi.org/10.3329/baj.v23i2.52463

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The use of herbicide is found suitable as alternative weed management where labor costs could be minimized. Wheat var.BARI Gom-30 could be cultivated along with Panida 33EC (Pendimethalin) @ 2000 ml ha^-1 spray (at 5 DAS) as a pre-emergence herbicide for its optimum economic yield harvest.

Knowledge Management: Journal