Studies on root phenology, productivity and economics of wetland rice(Oryza sativa L.) as influenced by establishment methodsand weed management practices

Maturity Stage ◽

Root Characteristics ◽

Root Parameters ◽

A field experiment was conducted at farmers’ field in West Garo Hills district of Meghalaya, India during kharif 2010 and 2011 to study the root characteristics of rice under different establishment methods and integrated weed management practices. Results revealed that the length, volume and biomass of roots were higher in SRI method followed by ICM method than CRC system at physiological maturity stage during both the years of investigation. Hand weeding twice at 20 and 40 DAT followed by butachlor 50 [email protected] kg a.i.ha-1 at 3 DAT + mechanical weeding at 20 DAT recorded higher root parameters over unweeded control during both years of field study. Maximum grain yield of rice was recorded with SRI method of establishment followed by ICM. Among the weed management practices, hand weeding twice at 20 DAT and 40 DAT recorded significantly higher grain yield closely followed by butachlor [email protected] kg a.i. ha-1 at 3 DAT + one mechanical weeding at 20 DAT. The higher net profit and B:C ratio under SRI establishment method of wetland rice could be obtained with butachlor 50 [email protected] kg a.i. ha-1 at 3 DAT + mechanical weeding at 20 DAT followed by hand weeding twice at 20 and 40 DAT. In ICM higher grain yield was recorded with hand weeding twice at 20 and 40 DAT.

Effective weed management practices to control complex weed flora in different cultivars of hybrid and high yielding varieties of rice (Oryza sativa L.)

INTERNATIONAL JOURNAL OF EXPERIMENTAL RESEARCH AND REVIEW ◽

10.52756/ijerr.2016.v2.004 ◽

2016 ◽

Vol 2 ◽

pp. 14-19

Author(s):

Paramita Biswas ◽

◽

Ratikanta Ghosh ◽

Keyword(s):

Grain Yield ◽

Weed Management ◽

Management Practices ◽

Hybrid Rice ◽

Oryza Sativa L ◽

Weed Flora ◽

High Yielding Varieties ◽

Hand Weeding ◽

Control Complex ◽

Plot Design

A field experiment was conducted during Summer and Kharif seasons of 2007-08 and 2008-09 at Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, India to study the effect of hand weeding and Pretilachlor 50 EC @ 500 g a.i. ha-1 as pre-emergence on weed management of different varieties of hybrid and high yielding rice. The experiment was laid out in a split-plot design with three replications for both the years. It has been observed that Pretilachlor 50 EC @ 500 g a.i. ha-1 has a significant effect to control complex weed flora both in hybrid and high yielding varieties of rice but hand weeding twice gave the better result as expected. Among the varieties, the hybrid varieties recorded 36% and 32% more grain yield in Summer and Kharif seasons respectively than high yielding varieties (HYV). The high yielding variety 6444 (V2) showed more grain yield during Summer and Kharif seasons than that of the hybrid 6129 (V1), 97158 (V6), and 96110 (V3), respectively. Regarding weed management, hand weeding twice recorded (13% & 36%) higher grain yield during Summer than that of the chemical treatment and unweeded check, and (20% & 42%) during Kharif seasons respectively. Among the interaction, hand weeding combined with all varieties of hybrid rice recorded higher yield in comparison to other treatment combinations.

Assessment of Integrated Weed Management Practices on Weed Dynamics, Yield Components and Yield of Faba bean (Vicia faba L.) in Eastern Ethiopia

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v6i5.570-580.1773 ◽

2018 ◽

Vol 6 (5) ◽

pp. 570

Author(s):

Nano Alemu Daba ◽

Janmejai Sharma

Keyword(s):

Grain Yield ◽

Weed Control ◽

Faba Bean ◽

Weed Management ◽

Yield Components ◽

Management Practices ◽

Economic Feasibility ◽

Eastern Ethiopia ◽

The experiment was conducted to assess the integrated effects of pre-emergence herbicides and hand-weeding on weed control, yield components, yield, and their economic feasibility for cost effective weed control in faba bean. The experiment consisted of 12 treatments viz. pre-emergence s-metolachlor (1.0, 1.5 and 2.0 kg ha-1) and pendimethalin (1.0, 1.25 and 1.5 kg ha-1), each at three rates metolachlor, s-metolachlor + one-hand-weeding, pendimethalin + one-hand-weeding, two-hand-weeding, complete weed free and weedy checks arranged. The weed flora consisted of broadleaved and sedge with the relative densities of 81.02 and 18.98 % at Haramaya district, and 80.83% and 19.17%, at Gurawa district, respectively. Application of s-metolachlor and pendimethalin 1.0 kg ha-1 each supplemented with hand weeding 5 WAE significantly (p ≤0.01) affected the broadleaved weeds, sedges and weed dry weight at both sites. S-metolachlor 1.0 kg ha-1 supplemented with hand weeding 5 WAE gave the lowest total number of weeds (8.29 m-2) following the weed free check. Higher grain yield (3555.8 kg ha-1) was produced with s-metolachlor 1.0 kg ha-1 supplemented with one-hand-weeding 5 WAE following complete weed-free at Gurawa. The benefit gained from s-metolachlor and pendimethalin at 1.0 kg ha-1 each supplemented with one hand weeding 5 WAE were greater than the value recorded from the weedy check by 216% and 198 %, respectively. S-metolachlor 1.0 kg ha-1 supplemented with hand weeding 5 WAE treatment resulted in the highest grain yield and economic benefit. However, in case labour is constraint and s-metolachlor herbicide is timely available, pre emergence application of s-metolachlor at 2.0 kg ha-1 should be the alternative to preclude the yield loss and to ensure maximum benefit.

Effect of Weed Management Practices on Complex Weed Flora and Soil Microflora in Aerobic Rice under Rainfed Condition of Bihar

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i2030810 ◽

2020 ◽

pp. 72-79

Author(s):

Birendra Kumar ◽

Sunil Kumar ◽

Rakesh Deo Ranjan ◽

C. S. Azad

Keyword(s):

Grain Yield ◽

Weed Management ◽

Management Practices ◽

Oryza Sativa L ◽

Early Stage ◽

Cyperus Rotundus ◽

Aerobic Rice ◽

Yield Attributes ◽

Weed Flora ◽

A Field experiment was conducted during the Kharif season of 2018 at Bihar Agricultural University, Sabour (Bihar) to evaluate the performance of different herbicides in aerobic rice (Oryza sativa L). Weed management had a positive influence on growth, yield attributes and yield of the aerobic rice. In experimental field, Cyperus rotundus, Cyperus iria, Cyperus difformis, Cynodon dactylon, Eleusine indica, Fimbristylis miliacea, Echinochloa colona, Echinochloa crus-galli, Commelina benghalensis, Caesulia auxillaris, Lippia nodiflora, Amaranthus spinosus, Oxalis acetosella, Amaranthus viridis, Eclipta alba, Phyllanthus niruri and Monochoria vaginalis were the dominant weed flora species. The results revealed that lowest weed population and weed dry weight were recorded in weed free situation which were significantly superior over rest of the herbicidal treatments. The maximum mean grain yield of aerobic rice (4.00 t/ha) was recorded by weed free which intern was statistically at par with the mean grain yield obtained from the herbicide Pyrazosulfuron fb one hand weeding (3.92 t/ha) followed by Pyrazosulfuron fb Bispyribac (3.88 t/ha), Bispyribac sodium (3.83 t/ha), Pyrazosulfuron+Ethoxysulfuron (3.62 t/ha), Bispyribac sodium+Pyrazosulfuron (3.61 t/ha) and Halosulfuron + Azimsulfuron (3.50 t/ha). Significantly lowest mean grain yield of (1.90 t/ha) was obtained from weedy check plots. The highest weed control efficiency (100%) was recorded under the treatment weed free which was followed by Pyrazosulfuron fb one hand weeding (85.96%), Pyrazosulfuron fb Bispyribac (84.77%), Bispyribac sodium (83.09%). All microflora (bacteria, fungi, actinomycetes) were recorded maximum number under the treatment weedy check. There were halosulfuron causes some phytotoxic effects at early stage on rice crop. The highest gross return (Rs.70,000/ha) was obtained by weed free which was statistically at par with Pyrazosulfuron fb one hand weeding (Rs.68,600/ha), Pyrazosulfuron fb Bispyribac(Rs.67,900/ha), Bispyribac sodium (Rs.67,025/ha), Pyrazosulfuron+Ethoxysulfuron (Rs.63,350), Bispyribac sodium+Pyrazosulfuron (Rs.58,800/ha) and significantly superior over rest of the treatments. However, the highest net return (Rs. 37,323/ha) was recorded by the treatment Pyrazosulfuron fb Bispyribac sodium which was found superior over rest of the treatments. The highest B:C ratio (Rs.2.22) was recorded by Pyrazosulfuron fb Bispyribac which was statistically at par with Bispyribac sodium (Rs.2.20), Pyrazosulfuron fb one hand weeding (Rs.2.19), Pyrazosulfuron+Ethoxysulfuron (Rs.2.13) and Bispyribac sodium+Pyrazosulfuron (Rs.1.91) all these were significantly superior over rest of the treatments.

Effective weed management practices to control complex weed flora in different cultivars of hybrid and high yielding varieties of rice (Oryza sativa L.)

INTERNATIONAL JOURNAL OF EXPERIMENTAL RESEARCH AND REVIEW ◽

10.52756/ijerr.2014.v2.004 ◽

2016 ◽

Vol 2 ◽

pp. 14-19

Author(s):

Paramita Biswas ◽

◽

Ratikanta Ghosh ◽

Keyword(s):

Grain Yield ◽

Weed Management ◽

Management Practices ◽

Hybrid Rice ◽

Oryza Sativa L ◽

Weed Flora ◽

High Yielding Varieties ◽

Hand Weeding ◽

Control Complex ◽

Plot Design

Sensitivity of imidazolinone-resistant red rice (Oryza sativa L.) to glyphosate and glufosinate

Ciência Rural ◽

10.1590/0103-8478cr20140896 ◽

2015 ◽

Vol 45 (9) ◽

pp. 1557-1563 ◽

Cited By ~ 4

Author(s):

Guilherme Vestena Cassol ◽

Luis Antonio de Avila ◽

Carla Rejane Zemolin ◽

Andrey Piveta ◽

Dirceu Agostinetto ◽

...

Keyword(s):

Weed Management ◽

Management Practices ◽

Oryza Sativa L ◽

Dry Weight ◽

Rio Grande Do Sul ◽

Red Rice ◽

Resistance Evolution ◽

Logistic Analysis ◽

Imidazolinone Herbicides

Dose-response experiments were carried out to evaluate the sensitivity of imidazolinone-resistant red rice to nonselective herbicides currently used in rice-soybean rotation in Rio Grande do Sul. Two red rice biotypes previously identified as resistant and susceptible to the imidazolinone herbicides were treated with imazapic plus imazapic, glyphosate and glufosinate under nine herbicide rates. A non-linear log-logistic analysis was used to estimate the herbicide rate that provided 50% red rice control and dry weight reduction (GR50). Imidazolinone-resistant red rice exhibited greater GR50 values than imidazolinone-susceptible biotype for imazapyr plus imazapic. In contrast, both imidazolinone-resistant and susceptible red rice showed similar GR50values for glyphosate and glufosinate. These results indicate that glyphosate and glufosinate effectively control imidazolinone-resistant red rice at similar herbicide rates used to control imidazolinone-susceptible; however, integrated weed management practices must be adopted in rice-soybean rotation to delay resistance evolution of red rice populations to glyphosate and glufosinate

Effect of Variety and Weed Management Practices on Yield and Yield Attributes of Wheat

Journal of Environmental Science and Natural Resources ◽

10.3329/jesnr.v5i2.14800 ◽

2013 ◽

Vol 5 (2) ◽

pp. 91-96

Author(s):

MR Sultana ◽

MA Alim ◽

MB Hossain ◽

S Karmaker ◽

MS Islam

Keyword(s):

Natural Resources ◽

Grain Yield ◽

Weed Management ◽

Yield Components ◽

Management Practices ◽

Yield Attributes ◽

Free Treatment ◽

Yield And Yield Components ◽

Hand Weeding ◽

Plot Design

An experiment was conducted at Agronomy Field Laboratory of Rajshahi University to evaluate the effect of variety and weeding regime on yield and yield components of wheat. Four varieties viz. Prodip -V1, Gourab -V2, Shatabdi -V3, Bijoy -V4 and five weeding regime viz. a) No weeding -W0, b) Weed free -W1, c) One hand weeding at 20 DAS -W2, d) Two hand weeding (1st at 20 DAS and 2nd at 42 DAS) -W3 and e) Lintur 70 WG @ 250 g ha-1 -W4 were included as treatments in the experiment. The experiment was laid out in a Split-plot Design with three replications. The results revealed that Prodip produced the highest grain yield (5.33 t ha-1) followed by Gourab (4.85 t ha-1), while the lowest grain yield (3.98 t ha-1) was obtained from Shatabdi. The highest grain yield (5.09 t ha-1) was obtained in Weed free (W1) followed by W3 (Two hand weeding) (4.89 t ha-1) and the lowest grain yield (4.13 t ha-1) was obtained in no weeding treatment (W0). The highest grain yield (5.64 t ha-1) was obtained from the combination of Prodip and weed free treatment (V1W1) and the lowest (3.57 t ha-1) was obtained from the combination between Shatabdi and no weeding treatment (V4W0).DOI: http://dx.doi.org/10.3329/jesnr.v5i2.14800 J. Environ. Sci. & Natural Resources, 5(2): 91-96 2012

Evaluation of Different Weed Management Practices on Growth Variables and Yield of Wheat Varieties

Asian Plant Research Journal ◽

10.9734/aprj/2020/v5i430112 ◽

2020 ◽

pp. 7-30

Author(s):

Md. Golam Mostafa ◽

Syed Arvin Hassan ◽

Md. Ehsanul Haq ◽

Md. Ahasan Habib ◽

Kaniz Fatema ◽

...

Keyword(s):

Grain Yield ◽

Weed Management ◽

Management Practices ◽

Cynodon Dactylon ◽

Chenopodium Album ◽

Cyperus Rotundus ◽

Alternanthera Philoxeroides ◽

Weed Species ◽

Wheat Varieties ◽

A field experiment was conducted in medium fertile soil at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during November 2017 to April 2018 in Rabi season with a view to evaluate the performance of wheat varieties under different weed control methods. The experiment was carried out with three varieties i.e. BARI Gom-28, BARI Gom-29 and BARI Gom-30 in the main plot and five weed management methods viz. control (no weeding), two hand weeding at 20 and 40 DAS, Panida 33EC (Pendimethalin) @ 2000 ml ha-1 at 5 DAS pre-emergence, Afinity 50.75WP (Isoproturon) 1500 g ha-1 at 25 DAS as post-emergence herbicide and Panida 33EC (Pendimethalin) @ 2000 ml ha-1 at 5 DAS + Afinity 50.75WP (Isoproturon)1500 g ha-1 at 25 DAS in the sub plot in split plot design. Nine different major weed species were found in the field such as Cynodon dactylon, Cyperus rotundus, Echinochloa colonum, Eleusine indica, Chenopodium album, Alternanthera philoxeroides, Brassica kaber, Leliotropium indicum, Vicia sativa. Results reveled that BARI Gom-30 contributed the highest grain yield 3.01 tha-1. Pre-emergence application of Panida 33EC controlled weeds significantly which showed highest growth followed by yield achieved in wheat. BARI Gom-30 in combination with Panida 33EC produced the highest grain yield 3.52 tha-1 while the lowest grain yield 2.09 t ha-1 was obtained from BARI Gom-28 with no weeding treatment. Results reveled that Panida 33EC (pre-emergence) was found more effective to controlling weeds in wheat. Results of the study finally reveled that Panida 33EC might be considered as a feasible option for combating weed and ensuring higher yield in wheat cultivation.

Weed Management in Cranberries: A Historical Perspective and a Look to the Future

Agriculture ◽

10.3390/agriculture8090138 ◽

2018 ◽

Vol 8 (9) ◽

pp. 138 ◽

Cited By ~ 1

Author(s):

Hilary Sandler

Keyword(s):

Weed Control ◽

Precision Agriculture ◽

Weed Management ◽

Management Practices ◽

Unmanned Aerial Systems ◽

Early 19Th Century ◽

Research Areas ◽

Hand Weeding ◽

The Impact

Integrated weed management (IWM) has been part of cranberry cultivation since its inception in the early 19th century. Proper site and cultivar selection, good drainage, rapid vine establishment, and hand weeding are as important now for successful weed management as when the industry first started. In 1940, Extension publications listed eight herbicides (e.g., petroleum-based products, inorganic salts and sulfates) for weed control. Currently, 18 herbicides representing 11 different modes of action are registered for use on cranberries. Nonchemical methods, such as hand weeding, sanding, flooding, and proper fertilization, remain integral for managing weed populations; new tactics such as flame cultivation have been added to the toolbox. Priority ratings have been developed to aid in weed management planning. Despite many efforts, biological control of weeds remains elusive on the commercial scale. Evaluation of new herbicides, unmanned aerial systems (UAS), image analysis, and precision agriculture technology; investigation of other management practices for weeds and their natural enemies; utilization of computational decision making and Big Data; and determination of the impact of climate change are research areas whose results will translate into new use recommendations for the weed control of cranberry.

Response of fieldpea (Pisum sativum L. var arvense) to various planting methods, irrigation schedule and weed management practices

Legume Research - An International Journal ◽

10.18805/lr.v0iof.7107 ◽

2015 ◽

Author(s):

Brijbhooshan ◽

V. K. Singh ◽

Shalini

Keyword(s):

Grain Yield ◽

Nutrient Uptake ◽

Weed Management ◽

Dry Matter ◽

Management Practices ◽

Dry Weight ◽

Yield Attributes ◽

Planting Methods ◽

Raised Bed ◽

A field experiment was conducted during rabi seasons of 2007-08 and 2008-09 on mollisols at G.B. Pant University of Agriculture & Technology, Pantnagar to study the performance of fieldpea (Pisum sativum L.var arvense) under different planting methods, irrigation levels and weed management practices. Results revealed that growth attributes as plant height, number of branches and dry matter accumulation per plant, number and dry weight of nodules per plant, density and dry matter of weeds/unit area, nutrient uptake and yield attributes as pods/plant, 1000-grain weight, grain yield/plant and grain yield of fieldpea were significantly higher under raised bed planting as compared to flat bed. Planting on raised bed increased grain yield of fieldpea by 17.5% over flat bed. Two irrigations applied at critical stages i.e. pre-flowering and pod formation proved promising in increasing the growth, nutrient uptake, yield attributes and grain yield of pea. One hand weeding done at 25 days after sowing (DAS) reduced the density and dry matter of weeds significantly and one hand weeding done at 25 DAS increased the values of growth attributes, number and dry weight of nodules, nutrient uptake, yield attributes and grain yield as compared to pendimethalin 1.0 kg a.i./ha applied as pre-emergence and weedy check.

Integrated weed management in transplanted rice: Options for addressing labor constraints and improving farmers’ income in Bangladesh

Weed Technology ◽

10.1017/wet.2021.50 ◽

2021 ◽

pp. 1-34

Author(s):

Sharif Ahmed ◽

Virender Kumar ◽

Murshedul Alam ◽

Mahbubur Rahman Dewan ◽

Khairul Alam Bhuiyan ◽

...

Keyword(s):

Grain Yield ◽

Weed Control ◽

Weed Management ◽

Cost Effective ◽

Control Cost ◽

Control Practice ◽

Net Returns ◽

Transplanted Rice ◽

Abstract In Bangladesh, weeds in transplanted rice are largely controlled by labor-intensive and costly manual weeding, resulting in inadequate and untimely weed control. Labor scarcity coupled with intensive rice production has triggered increased use of herbicides. These factors warrant a cost-effective and strategic integrated weed management (IWM) approaches. On-farm trials with transplanted rice were conducted during monsoon (‘Aman’) season in 2016 and 2017 and winter (‘Boro’) season in 2016 to 2017 in agroecological zones 11 and 12 with ten treatments - seven herbicide-based IWM options, one mechanical weed control-based option, and two checks – farmers’ current weed control practice and weed-free, to assess effects on weed control, grain yield, labor use, and profitability. Compared to farmers’ practice, herbicide-based IWM options with mefenacet+bensulfuron-methyl as preemergence (PRE) followed by (fb) either bispyribac-sodium or penoxsulam as postemergence (POST) fb one hand-weeding (HW) were most profitable alternatives, with reductions in labor requirement by 11 to 25 persons-day ha−1 and total weed control cost by USD 44 to 94 ha−1, resulting in net returns increases by USD 54 to 77 ha−1 without compromising on grain yield. In contrast, IWM options with bispyrbac-sodium or penoxsulam as POST application fb one HW reduced yields by 12 to 13% and profits by USD 71 to 190 ha−1. Non-chemical option with mechanical weeding fb one HW performed similarly to farmers’ practice on yield and profitability. We suggest additional research to develop feasible herbicide-free approaches to weed management in transplanted rice that can offer competitive advantages to current practices.