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Efficacy of Herbicides for Controlling Weeds in Lentil Field (2018--2019)

J. HOSSAIN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M. A. ISLAM
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M.O. ALI
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

S. M. ZAMAN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M. HOSSAIN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

A field experiment was conducted at Pulses Research Centre, Ishurdi, Pabna during 2018-19 to find out the efficacy of herbicides on weed control and crop response in lentil. Eight treatments viz. T₁= Whip super 9EC (Pre-emergence), T₂= Weednil 5 EC (Pre-emergence), T₃= Panida 33 EC (Pre-emergence), T₄= Whip super 9EC (Pre-emergence and post-emergence ), T₅= Weednil 5 EC (Pre-emergence and post-emergence ), T6= Panida 33 EC (Pre-emergence) and Whip super 9EC (post-emergence), T₇= Panida 33 EC (Pre-emergence) and Weednil 5 EC (Post-emergence), T₈= Whip super 9EC (Post-emergence), T₉= Weednil 5 EC (Post-emergence), T₁₀= Hand weeding and T₁₁= Control (No weeding) were included in this experiment. Herbicides were applied at the moist condition of soil after irrigation for proper seed germination that means pre-emergence condition and post-emergence at 20 Days after lentil emergence. The experiment was laid out in a randomized complete block design with three replications. Among the treatments, application of Panida in pre-emergence and whip super in post-emergence was an effective method to control narrow leaf weed and sedge weed for achieving higher yield on the basis of BCR

Keywords: Herbicide, Lentle, Weed

Location: Pulses Research Centre, Ishurdi, Pabna

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Crop-Soil-Water Management

Commodity: Lentil, Chemical weed management

Objectives:

The present study has been undertaken to find out the suitable herbicide to control weeds effectively and economically to increase the yield of lentils.

Methodology:

The experiment was conducted at Pulses Research Centre, Ishurdi, Pabna during 2018-19 under AEZ-11. Eleven treatments viz. T₁= Application of Whip super 9EC (Fenoxiprop-p-Ethyl, 750 ml ha^-1) in Pre-emergence, T₂= Weednil 5 EC (Quizalofop-p-Ethyle, 650 mL ha^-1) in, T₃=Panida 33 EC (Pendimethalin, 2.5 L ha^-1) in Pre-emergence, T₄= Whip super 9EC (Pre-emergence+post-emergence) T₅= Weednil 5 EC (Pre-emergence+post-emergence), T₆= Panida 33 EC (Pre-emergence) + Whip super 9EC (post-emergence), T₇= Panida 33 EC (Pre-emergence) + Weednil 5 EC (post-emergence), T₈= Whip super 9EC (post-emergence), T₉=Weednil 5 EC (post-emergence), T₁₀= Hand weeding, T₁₁= Control (No weeding) and were included this experiment. Herbicides were applied at the moist condition of soil after irrigation after seed sowing for proper seed germination that means pre-emergence condition and herbicides were applied in post-emergence at 20 Days after emergence. The experiment was laid out in a randomized complete block design with three replications. The plot size was 6 m x 3 m. The sowing date was on 11 November 2018 and harvested on 02 March 2019. Seeds of BARI Masur-8 were used @ 35 kg ha^-1. In the experimental plots fertilizers, @18-24-30-18-2.0-1 kg ha^-1N-P-K-S-Zn and B were applied during final land preparation (FRG-2012). Weed samples were collected from 1 m² area of each plot at 35 DAS and weed dry matter was taken after oven dry. Plant population m^-2 at harvest and yield contributing characters were recorded from 5 randomly selected plants from each plot and grain yield was calculated as kg ha^-1. The recorded data were statistically analyzed and the mean values were adjusted by LSD at 0.05 levels of probability.

Source of Information: Annual Research Report 2018-2019, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Cyperus rotundus (Mutha), Digitaria sanguinalis (Anguli Grass), Echinochloa colonum (Khuda shama) Chenopodium album (Bathua), Cynodon dactylon (Durba), Eclipta alba (Kesoti), Euphorbia hirta (Dudia), Mikania scandens (Mikania), Physalis minima (Fosks begun) and vicia sativa (Bonmasur) were major weeds in lentil field. The dry weight of weeds m^-2 varied at different treatments. The highest dry weight was recorded from Control (56 g) and the lowest dry weight was calculated in T₇ (9 g) which was followed by T₆ (13 g). Similarly, among the herbicides, the highest efficiency of weed control was found in T₇ (85%) followed by T₇ (78%) and the lowest weed control efficiency was recorded in T₈ (38 %). Whip super, Panida and Weednil controlled the narrow leaf weed and sedge weed. The treatments had no significant effect on plant height, branches plant^-1, Seeds Pod^-1and 1000- seed weight. The maximum number of pods plant^-1 was counted in hand weeding (105) and the minimum number of pods plant^-1 in T₁₁ (70). Seeds pod^-1 (no.) was not significantly different due to the application of herbicides. The highest seed yield was recorded from hand weeding (1954 kg ha^-1) followed by T₆ (1750 kg ha^-1) and the lowest seed yield (769 kg ha^-1) in control. From the economic analysis, it was found that the highest gross return (TK. 117240 ha^-1) and gross margin (Tk. 78740 ha^-1) were obtained from T₁₀(hand weeding). But the highest BCR (3.16) was obtained from T_6.The lowest gross return (Tk. 46140 ha^-1) and gross margin (Tk. 24140 ha^-1) and Tk. 92420 ha^-1) and BCR (2.04) were obtained from T₁₁

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