scholarly journals Weed Management Practices to Enhance Weed Control Efficiency In Direct Seeded Rice (DSR) Under Semi-Dry Conditions.

2021 ◽  
Vol 108 (june) ◽  
pp. 1-4
Author(s):  
Sreeja y ◽  
◽  
Sakthivel s ◽  
Babu r ◽  
Sujatha k ◽  
...  
Keyword(s):  
Water Level ◽  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Soil Surface ◽  
Weed Density ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Direct Seeded ◽  
Hand Weeding

A field experiment was carried out at Agricultural Research Station, Paramakudi, Tamil Nadu during 2017- 18 to study the interaction between weed ecology, competition and management strategies in semi-dry Direct Seeded Rice. The fieldexperiment was laid out in split- plot with irrigation in main plot and weed management in sub plot. The results revealed that least weed density was recorded after irrigation when water level droped to 10cm below soil surface. Among weed management practices hand weeding twice at 20 and 40 days after sowing (DAS)has recorded the lowest weed density with highestweed control efficiency. Among the interactions, lowest weed density and highest weed control efficiency was recorded when water level droped to 10 cm below soil surface with combination hand weeding twice at 20 and 40 DAS.

scholarly journals Influence of Integrated Weed Management Practices on Dynamics and Weed Control Efficiency in Dry Direct Seeded Rice

2014 ◽  
Vol 14 (2) ◽  
pp. 33-42 ◽  
Author(s):  
KP Bhurer ◽  
DN Yadav ◽  
JK Ladha ◽  
RB Thapa ◽  
KR Pandey
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Integrated Weed Management ◽  
Research Station ◽  
Net Return ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Direct Seeded ◽  
Hand Weeding

Field experiment under dry direct seeded rice(Oryza sativa L.) was conducted during rainy season of 2010 and 2011 at Regional Agriculture Research Station (RARS), Parwanipur, Bara to develop appropriate weed management practices for dry direct- seeded rice. The trial was laid-out in randomized complete block design (RCBD) and replicated thrice. Observations were taken on weed, plant growth and yield attributing, yield, and socio-economic parameters. The weed density, dry weed weight and weed control efficiency resulted significantly different as influenced by integrated weed management practices. Low weed population density, low weed index and highest weed control efficiency resulted by pendimethalin followed by 2, 4- D followed by one hand weeding were at par with weed free check. Highest yield resulted from weed free plot followed by pendimethalin followed by two hand weeding and pendimethalin followed by 2, 4- D followed by one hand weeding. However, the net return per unit investment resulted highest in pendimethalin followed by 2, 4- D followed by one hand weeding. This proved that amid increasing wage rate and labour scarcity integrated weed management through pendimethalin 30 EC (Stomp) @1 kg a. i. /ha as pre- emergence herbicide application followed by 2, 4- D sodium salt 80 WP @ 0.5 kg a. i. /ha followed by one hand weeding or stale seed bed followed by pendimethalin 30 EC (Stomp) @1 kg a. i. /ha followed by bispyribac (Nominee gold) @25 g a. i. /ha 10% @200 ml/ha at 20 days of seeding resulted best alternative for manual hand weeding practices giving higher net return per unit investment. DOI: http://dx.doi.org/10.3126/njst.v14i2.10413   Nepal Journal of Science and Technology Vol. 14, No. 2 (2013) 33-42

Effect of weed management and fertility levels on productivity of clusterbean [Cyamopsis tetragonoloba (L.)Taub]

2017 ◽  
Author(s):  
Clusterbean . ◽  
Hand Weeding ◽  
Imazethapyr . ◽  
Pendimethalin . ◽  
Weed Management
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Cyamopsis Tetragonoloba ◽  
Fertility Level ◽  
Yield Attributes ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Biological Yield ◽  
Hand Weeding

A field experiment was conducted during Kharif seasons of 2014 and 2015 at Udaipur (Rajasthan) to find out the effect of weed management on productivity of clusterbean under varying fertility levels. The results revealed that among various weed management practices, two hand weeding 20 and 40 DAS recorded significantly lower weed dry matter, higher weed control efficiency, higher values of yield attributes, seed, haulm and biological yield during both the years over rest of the treatments except sequential application of pendimethalin fb imazethapyr which was statistically at par. Further, application of Imazethapyr fb hand weeding and pendimethalin fb hand weeding also gave comaparable results with pendimethalin fb imazethapyr in terms of weed control efficiency and yields. Among the fertility levels application 20 Kg N + 40 Kg P2O5 ha-1 significantly increased pods plant-1 (24.04), seeds pod-1, (7.12), test weight ( 25.33 g), seed ( 1035 kg ha-1), haulm (2161 kg ha-1) and biological (3196 kg ha-1 ) yield and harvest index ( 31.98 %) of clusterbean over 10 Kg N + 20 Kg P2O5 ha-1 however, it was found statistically at par with fertility level 30 Kg N + 60 Kg P2O5 ha-1. Therefore, clusterbean should be fertilized with 20 Kg N + 40 Kg P2O5 ha-1 and weeds must be controlled with pendimethalin (PE) fb imazethapyr 0.1 kg ha-1 20 DAS .

scholarly journals Effect of water management and weed control treatments on the performance of transplanted aman rice

1970 ◽  
Vol 33 (3) ◽  
pp. 399-408 ◽  
Author(s):  
MH Kabir ◽  
MN Bari ◽  
M Moynul Haque ◽  
GJU Ahmed ◽  
JMS Islam
Keyword(s):  
Water Management ◽  
Grain Yield ◽  
Weed Control ◽  
Management Practices ◽  
Weed Biomass ◽  
Weed Density ◽  
Control Efficiency ◽  
Free Treatment ◽  
Weed Control Efficiency ◽  
Hand Weeding

A study was conducted from June to December 2003 to assess weed dynamics and yield performance of transplanted aman rice (cv. BRRI Dhan39) in different weed control treatments e.g. two hand weedings at 15 and 40 DAT; Weeding by BRRI Weeder at 20 and 40 DAT; Rifit 500EC @ 1L/ha at 7 DAT; Rifit 500EC @ 1 L/ha at 7 DAT and one hand weeding at 40 DAT; Butachlor 5G @ 2 kg/ha at 7 DAT; Butachlor 5G @ 2 kg/ha at 7 DAT and one hand weeding at 40 DAT along with weed free and unweeded check under both good and poor water management practices. Weed density, weed biomass and weed control efficiency were significantly influenced by different weed control treatments under both water management practices. Other than weed free treatment, Butachlor 5G @ 2 kg/ha applied at 7 DAT along with one hand weeding at 40 DAT showed the best performance under good water management with minimum weed density (16 g/m2) as well as weed biomass (9.27 g/m2) and the highest weed control efficiency (82.57%). Yield and yield components were also significantly influenced by different weed control treatments and water management. The highest grain yield (5.22 t/ha) was obtained under good water management in weed free treatment followed by Butachlor 5G @ 2 kg/ ha and one hand weeding (4.96 t/ha) under same water management. Results revealed that integration of approaches, particularly Butachlor application along with one manual weeding accompanied by proper water management might be the best option to combat weed problems as well as to obtain satisfactory grain yield in transplanted aman rice. Key Words: Transplanted aman rice, water management, weed control treatment and yield. doi:10.3329/bjar.v33i3.1599 Bangladesh J. Agril. Res. 33(3) : 399-408, September 2008

Effect of nitrogen and weed management on weed control efficiency and yield of fodder turnip

2015 ◽  
Vol 35 (4) ◽  
Author(s):  
Govind Kumar ◽  
Magan Singh ◽  
Rakesh Kumar ◽  
Koushik Paul ◽  
Pooja Gupta Soni ◽  
...  
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Growth Yield ◽  
Growth And Yield ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Four Levels ◽  
Hand Weeding ◽  
Nitrogen Treatments

A field experiment was conducted at Forage Research and Management Centre, NDRI, Karnal during <italic>rabi</italic> season in 2013-14 to study the effect of nitrogen application and weed management on growth and yield of fodder turnip (<italic>Brassica compestris</italic> var. rapa) with four levels of nitrogen (0, 50, 100, and 150 kg N/ha) and four weed management practices (pendimethalin @ 1.0 kg a.i./ha, hand weeding, isoproturon @ 0.75 kg a.i./ha and weedy check) in split plot design. Among the nitrogen treatments 150 kg nitrogen/ha gave the highest growth, yield and better quality of fodder turnip. Application of pendimethalin @1.0 kg a.i. proved better in terms of growth and yield of turnip. Weed control efficiency was 65% with 150 kg N/ha and 83.23% with pendimethalin 1.0 kg a.i./ha.

scholarly journals Effect of Weed Management Practices on Weed Control, Yield and Economics of Soybean [Glycine max (L.) Merrill]

2020 ◽  
pp. 114-120
Author(s):  
R. K. Raj ◽  
K. K. Sinha ◽  
Shalu Kumari ◽  
Anup Kumar Choubey ◽  
Ashok Pandit ◽  
...  
Keyword(s):  
Glycine Max ◽  
Weed Control ◽  
Weed Management ◽  
Management Practices ◽  
Dry Weight ◽  
Cost Ratio ◽  
Control Efficiency ◽  
Weed Control Efficiency ◽  
Glycine Max L ◽  
Hand Weeding

The experiment was laid out Tirhut College of Agriculture, farm Dholi, Muzaffarpur, Bihar during kharif season 2016, to study the effect of weed management practices on weed control, yield and economics of soybean [Glycine max (L.)]. Hand weeding twice at 25 and 45 DAS was found most effective to control weeds in soybean and recorded lowest weed count, weed dry matter and highest weed control efficiency. Among herbicide, application of Pendimethalin 1.0 kg/ha as PE (Pre-emergance) and Imazethapyr 55 g/ha as PoE (Post-emergance) at 25 DAS was found to be more efficient and cost effective to reduce weed population/m2 (53.94 & 67.22), dry weight of weeds/m2 (21.16 & 45.86 g) an increased weed control efficiency (53.86 & 68.83%) significantly in both the stages 30 and 60 DAS. Beside it, Pendimethalin 1.0 kg/ha + Imazethapyr 55 g/ha at 25 DAS, Pendimethalin 1.0 kg/ha + one hand weeding at 40 DAS and hand weeding twice at 25 and 45 DAS were equally efficient in increasing the grain yield, straw yield, weed index and gross returns than control but net returns (39870/ha) and benefit-cost ratio (1.70) was obtained maximum only with Pendmethalin 1.0 kg/ha and Imazethapyr 55 g/ha at 25 DAS.

scholarly journals Effect of Pre and Post-Emergence Herbicides on Yield, Economics and Weed Control in Linseed (Linum usitatissimum L.) Under Irrigated Medium Land Condition of Jharkhand

2021 ◽  
pp. 110-118
Author(s):  
Md. Parwaiz Alam ◽  
Swati Shabnam
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Linum Usitatissimum ◽  
Dry Matter ◽  
Management Practices ◽  
Metsulfuron Methyl ◽  
Control Efficiency ◽  
Linum Usitatissimum L ◽  
Weed Control Efficiency ◽  
Hand Weeding

Linseed (Linum usitatissimum L.) production is affected by several factors, out of which weed is one of the most important factors responsible for causing tremendous loss in yield. An experiment was conducted during rabi season of 2018-2019 and 2019-2020 at Research Farm of Birsa Agricultural University, Kanke, Ranchi, Jharkhand to study the effect of pre and post-emergence herbicide on yield, economics, weed count, weed dry matter and weed control efficiency in linseed. The treatments comprised of weed management practices viz., T1-Weedy Check, T2-Hand weeding twice at 30 and 60 DAS, T3-Metribuzin 250 g/ha + Oxyflourfen 125g/ha (Pre.), T4-Pendimethalin 1 kg/ha (Pre.) fb. metsulfuron methyl 4 g/ha (Post.), T5-Imazethapyr 75 g/ha (Post.), T6-Oxyflourfen125 g/ha (Pre.), T7-Metsulfuron methyl 4 g/ha (Post.), T8-Clodinafop 60 g/ha (Post.), T9-Clodinafop 60 g/ha + metsulfuron methyl 4 g/ha (Post.) and T10-Oxadiargyl 80 g/ha (Pre.), and were replicated thrice. The research outcomes revealed that Hand Weeding twice at 30 and 60 DAS resulted in maximum seed yield (14.26, 15.66 and 14.96 q/ha), net return (Rs. 41635, 45907 and 43771/ha), in 2018-19, 2019-20 and pooled data respectively while among weed parameters hand weeding recorded minimum total weed count at 30 DAS (1.19 and 1.22 /m2) and 60 DAS (3.04 and 3.19 /m2), minimum total weed dry matter at 30 DAS (1.17 and 1.18 g/m2) and at 60 DAS (3.43 and 3.57 g/m2) and maximum weed control efficiency at 30 DAS (97.08 and 96.97%) and at 60 DAS (80.66 and 79.24%) in 2018-19 and 2019-20 respectively.

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