Effect Of Weed Management Practices Research Articles

Ecology and Management of Sedges in Direct-seeded Rice: A Review

Sedges, resilient weeds from the Cyperaceae family, pose a significant threat to direct-seeded rice cultivation due to their perennial nature and robust propagules, which endure harsh conditions. Their emergence, growth and seed production during fallow periods contribute significantly to seed banks, making their management challenging compared to other weed types. Water levels in paddy fields dictate weed composition, favouring sedges and grasses under saturated conditions but shifting to grass weeds during cropping seasons, influenced by factors like soil conditions and rainfall. Managing sedges requires a multifaceted approach due to their perennial hydrophilic and pro-alkaline nature with extensive propagules. Sedges possessing strong root system with morphological similarities necessitate continuous weed control throughout the cropping season during the critical period ranging from 15 to 60 days after sowing for wet and dry direct-seeded rice. Effective weed management practices proved crucial for minimizing yield losses caused by infestation of Cyperus difformis, Fimbristylis miliacea and Schoenoplectus juncoides by many researchers. Various methods, including cultural practices like stale seedbeds, physical methods like summer tillage, biological approaches such as integrating poultry and chemical interventions like herbicide application, are utilized for sedge management in rice fields. Higher efficacy of ethoxysulfuron for management of majority of sedge weeds in rice has been reported by many workers. However, relying on a single strategy is insufficient to keep sedge populations below the threshold, necessitating a comprehensive and adaptable approach to weed control in rice cultivation.

Effect of weed management practices on growth and yield of rainfed castor

Effect of weed management practices on growth and yield of rainfed castor

Effect of weed management practices on growth yield and economics of Mesta (Hibiscus Sabdariffa L.)

Effect of weed management practices on growth yield and economics of Mesta (Hibiscus Sabdariffa L.)

Effect of weed management practices on weed dynamics and soybean productivity under mid hill zone of Himachal Pradesh

Effect of weed management practices on weed dynamics and soybean productivity under mid hill zone of Himachal Pradesh

Effect of Weed Management Practices on Weed Control Efficiency and Productivity of Rapeseed-mustard: A Review

Effect of Weed Management Practices on Weed Control Efficiency and Productivity of Rapeseed-mustard: A Review

Effect of weed management practices on performance of weeds in the kharif transplanted rice (Oryza sativa L.) in Vertisols of Chhattisgarh

Effect of weed management practices on performance of weeds in the kharif transplanted rice (Oryza sativa L.) in Vertisols of Chhattisgarh

Effect of weed management practices on weed dynamics and performance of black gram (Vigna mungo L.)

Effect of weed management practices on weed dynamics and performance of black gram (Vigna mungo L.)

Effect of weed management practices on the growth and yield of kharif transplanted rice (Oryza sativa L.) in Vertisols of Chhattisgarh

Effect of weed management practices on the growth and yield of kharif transplanted rice (Oryza sativa L.) in Vertisols of Chhattisgarh

Effect of Weed Management Practices on Nutrient Content and Their Uptake by Black Gram Crop (Vigna mungo L.)

Effect of Weed Management Practices on Nutrient Content and Their Uptake by Black Gram Crop (Vigna mungo L.)

Effect of weed management practices on nutrient content and their uptake by maize crop (Zea mays L.)

Effect of weed management practices on nutrient content and their uptake by maize crop (Zea mays L.)

Effect of weed management practices on the performance of Indian mustard (Brassica juncea L.)

Effect of weed management practices on the performance of Indian mustard (Brassica juncea L.)

Assessing the effect of weed management practices in sweet corn under rainfed condition

Assessing the effect of weed management practices in sweet corn under rainfed condition

Effect of weed management practices on weeds, nutrient depletion and yield of rice (Oryza sativa)

Field experiments were conducted during Navarai (rabi) seasons of 2011 and 2012 with ADT-36 rice (Oryza sativa L.) variety to evaluate the effect of weed management practices. Pooled data of the two years revealed that application of butachlor @ 1.5 kg a.i/ha followed by weekly cono-weeding from 21 to 42 days after transplanting (DAT) resulted in least weed count, dry-matter production and nutrient removal which resulted in the highest weed control efficiency, productive tillers/hill, grains/panicle, number of filled grains/panicle and enhanced the grain yield, which was 0.73 and 0.46 t/ha more compared to twice hand weeding and conventional method of butachlor application followed by hand weeding.

Effect of Tillage and Weed Management Practices on Growth and Yield of Green Gram [Vigna radiata (L.) Wilczek

A field experiment was conducted during 2023 at Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, to find out the effect of different tillage management [Minimum tillage (primary tillage only) and Conventional tillage (primary and secondary tillage)] and five weed control treatments [(PE Pendimethalin @ 1.0 kg ha-1, PE Pendimethalin + Imazethapyr (pre-mix) - Valor 32% EC 1.0 kg ha-1, Hand weeding on 15 and 30 DAS, Weed free plot and Un weeded control (weedy check)] on weeds and productivity of green gram (Vigna radiata (L.) Wilczek) during the winter (Rabi). Conventional tillage generally led to taller plants and higher leaf counts compared to minimum tillage, while effective weed management practices, particularly the combination of Pendimethalin and Imazethapyr, resulted in superior growth indices. Additionally, conventional tillage and weed-free conditions significantly enhanced dry matter production and yield parameters of green gram.

Effect of weed management practices on growth and yield of Blackgram (Phaseolus mungo L.)

Effect of weed management practices on growth and yield of Blackgram (Phaseolus mungo L.)

Effect of weed management practices on growth dynamics and productivity of rainfed pearl millet under conservation agriculture

An experiment was conducted on rainfed pearl millet at ICAR- IARI, New Delhi, during the kharif season of 2019, in a split-plot design with three replications. Three tillage practices, viz. Conventional tillage (CT), Zero tillage and Zero tillage + Residue@ 3t/ha (ZT+R) were evaluated in the main plot and seven weed management treatments, viz. weedy check, hand weeding (HW) at 30 and 50 days after sowing (DAS), atrazine @ 0.75 kg/ha(PE) fb 2,4-D @0.75kg/ha (PoE), atrazine @ 0.75 kg/ha PE, atrazine @ 0.75 kg/ha PE fb tembotrione @ 0.05kg/ha PoE, atrazine @ 0.75kg/ha PE fb tembotrione @ 0.075kg/ha PoE, atrazine @0.75 kg/ha PE fb tembotrione @ 0.10 kg/ha PoE. ZT+R 3t/ha resulted in enhanced growth attributes, and higher NPK uptake which led to increased grain yield. Among weed control treatments, hand weeding (HW) twice at 30 and 50 DAS along with the integration of pre-emergence application of atrazine 0.75kg/ha fb 2,4-D 0.75kg/ha PoE and tembotrione, 0.075 kg/ha or 0.1 kg/ha PoE resulted in better growth attributes which significantly resulted in higher grain yield under rainfed conditions of semi-arid tropics.

Yield of direct seeded upland rice (Oryza sativa L.) as influenced by different weed management practices under Tripura condition

A field experiment was conducted during the Kharif season of 2013 and 2014 at KVK, South Tripura to evolve effective weed management practices for upland direct seeded rice. The experiment consisted of 12 treatments laid out in Randomized Complete Block Design with three replications. The predominant weed flora observed in the experimental field were Amaranthus viridis, Oldenlendia corymbosa, Spilanthes acmella, Ludwigia parviflora, Cleome rutidosperma, Malvestrum coromondalianeum among the broad leaf weed, Digitaria sanguinalis among grasses and Cyperus iria among sedges. The result of the experiment reveals that weed free treatment recorded lowest weed dry weight for all types of weed and higher yield and yield attributing parameters of upland rice followed by pendimethalin + one hand weeding. All other treatments were significantly superior to weedy check in all respect.

The Manual, Chemical, Cultural, and Integrated Weed Management in Soybean Production

A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, from December 2021 to April 2022 to study the effect of weed management practices in soybean (Glycine max L.). The experiment was laid out in a Randomized three-Complete Block Design (RCBD) with twelve weed management treatments- no weeding (Control), two hand weeding (at 15 and 30 DAS), pre-emergence herbicide (Herbilin 33% EC @ 400 ml ha-1), post-emergence herbicide Irish EC @ 1200 ml ha-1, pre + post-emergence herbicide, pre-emergence + 1 hand weeding {40 days after sowing (DAS)}, post-emergence herbicide + 1 hand weeding (40 DAS), pre + post-emergence herbicide + 1 hand weeding(40 DAS), straw mulching, intercrop with Amaranthus dubius, and Zea mays, and weed-free. The experimental result showed among seven different weed species found, Cyperus rotundus was the most prevalent weed, with the highest weed density (123 and 128.67 m-2) and relative weed emergence (43.16 and 38.79 %) in the control plot at 30 and 60 DAS. The treatment pre + post-emergence herbicide + 1 hand weeding (40 DAS) showed the longest pod length (4.16 cm) and number of seeds pod-1 (3.89). The weed-free treatment resulted in the highest 1000-seed weight (111.00 g), seed yield (1.86 t ha-1), stover yield (2.16 t ha-1), biological yield (4.03t ha-1), and harvest index (46.35 %). However, the highest benefit-cost ratio (2.85) was obtained under post-emergence herbicide (Irish EC) treatment. Therefore, applying Irish EC was the best broad-spectrum effective herbicide to manage the various weed floras in soybeans for profit. SAARC J. Agric., 21(2): 195-206 (2023)

Evaluation of weed management approaches on weed dynamics, yield and economics of puddled rice under different plant techniques

A field experiment was conducted in January to May, 2022 (Navarai) to find out the effective weed management practices in puddled rice. The experiment was carried out in a split-plot design, which included two planting techniques viz., drum seeded rice and system of rice intensification (SRI) in main plot, as well as eight weed management practices viz., hand weeding, cono weeding, pretilachlor, bispyribac sodium and fenoxaprop - p - ethyl as pre and post emergence application in sub plot. The results of the experiment demonstrated that among the planting techniques and weed management practices tested, the system of rice intensification and sequential application of pretilachlor @ 0.5 kg a.i ha-1 fb bispyribac sodium @ 20 g a.i ha-1 has revealed lowest weed density (39.67, 71.25 and 17.02, 33.97 no m-2) and highest weed control efficiency (55.89, 65.78 and 84.99, 82.33 %) grain yield (4.55 and 5.47 t ha-1), gross and net income (Rs. 12116 and Rs. 64336 ha-1). However, drum seeded rice resulted higher return-1 rupee invested due to lower cost of cultivation. Hence, the SRI planting method with sequential application of pretilachlor @ 0.5 kg a.i ha-1 followed by bispyribac sodium @ 20 g a.i ha-1 has proven to be effective in controlling weeds and achieving higher grain yield and net income.

Effect of Weed Management Practices on Growth and Yield in Soybean Pigeonpea (4:2) Intercropping System

The present investigation was carried at Research Farm of R.A.K. College of Agriculture, Sehore (Madhya Pradesh), during Kharif season (2016). Six weed control practices were evaluated in randomized block design with three replications. The results of present study revealed that hand weeding twice at 30 and 45 DAS recorded higher growth and yield attributes followed by application of imazethapyr 35% + imazemox 35% 70 WG 70 g/ha at 20 DAS (PoE) and pendimethalin 30 EC 1 kg/ha (PE) fb imazethapyr 10 SL 100 g/ha (PoE). Application imazethapyr 35%+imazamox35% 70 WG 70 g/ha (PoE) at 20 DAS recorded highest net return of ₹73870/ha and cost benefit ratio 1:3.58.