<div style="text-align:justify">Background: Viticulture occupies an important place in agricultural production of Diyarbakır province, Turkey. However, weeds significantly impair the productivity of vineyards in the province. The knowledge of weed flora of a particular region is crucial to develop region-specific weed management strategies.&nbsp; Methods: This study was carried out to determine the weed species, their densities and frequency of occurrence in 78 vineyards of 13 districts in Diyarbakır province. Exploratory surveys were conducted to record the occurrence, density and coverage area of weed species. A 1&times;1 m quadrate was used, which was randomly placed in vineyards and weed species falling within the quadrate were noted. Result: A total 165 weed species and 128 taxa belonging to 35 botanical families (1 parasitic, 16 monocotyledons and 18 dicotyledons) were identified from the surveyed area. The weed species&rsquo; density over the whole province was 91 weeds m-2. Avena sterilis L. was the most widespread weed with the highest density (9.93 plants m-2) in the surveyed area followed by Fumaria asepale Boiss. (7.18), Galium tricornutum (4.85), Ranunculus arvensis (3.82), Silene aegyptiaca (3.70), Bromus sterilis (3.64) Lamium purpureum (3.58), Hordeum spontaneum (3.35), Anthemis sp. (3.07), Crepis alpina (2.94), Thlaspi perfoliatum (2.91), Alopecurus myosuroides (2.81), Bongardia chrysogonum (2.80), Scandix pecten-veneris (2.24), Cynodon dactylon (1.71), Hypecoum procumbens (1.69), Lolium perenne (1.41), Sorghum halepense (1.33), Sinapis arvensis (1.24), Buglossoides arvense (1.22), Daucus carota (1.21), Trifolium nigrescens (1.21), Vicia hybrida (1.05), Senecio vernalis (1.04) and Ornithogalum narbonense (1.02). The most prevalent weed were L. purpureum (66.68%), Papaver sp. (66.49%), S. vernalis (65.82%), Anthemis sp. (65.10%), A. sterilis (63.07%), R. arvensis (60.44%), Convolvulus arvensis (56.76%), Carduus pycnocephalus (55.79%), G. tricornutum (55.43%), Fumaria asepale (55.05%), Crepis alpina (54.08%), Thlaspi perfoliatum (51.95%) and S. arvensis (51.04%).&nbsp;</div>

<div style="text-align:justify">Weed Flora of Vineyards in Diyarbakır Province, Turkey</div>

Background: The River Brahmaputra is one of the largest braided rivers in the world, where the island and bars (&ldquo;Chapories&rdquo;) are formed almost annually by erosion and deposition, which are good agricultural lands, as most of the depositions are extremely fertile and possess ready water source in close proximity.&nbsp; With an aim to depict the weed vegetation pattern in upland direct seeded rice ecosystem in such an ecotone zone, Chapories of Majuli district were surveyed during 2021 and 2022. 
&nbsp; 
Methods: One square meter quadrates were plotted in between 20 to 65 days after sowing (before flowering) of rice to study the weed status in the critical period of crop weed competition in four locations.&nbsp; 
 
Result: Study recorded altogether 55 species of weedy nature in four locations with as many as 39 broadleaved species belonging to 25 families, 3 sedges and 13 grasses, which represented a great diversity with several unusual species unique to chapori areas. Isolation of location - 4 by water channel has contributed in increasing dissimilarity with respect to weed flora, though river water might have had great role in distribution of weeds especially the stubble borne perennial species. The cumulative IVI of grass species was also 30.4 per cent higher in this isolated location than the non-grass species, unlike the locations that had land connectivity with shore areas.&nbsp;

Weed Flora Composition in Upland Direct Seeded Rice in Brahmaputra River Ecotones and Edges in Majuli District, Assam

Background: Implementing integrated strategies for weed management is essential in maximizing blackgram yield. Unchecked weed proliferation leads to substantial decrease in crop productivity.&nbsp; 
 
Methods: The current field experiment was conducted at Salooni, Himachal Pradesh, to evaluate the efficacy of different integrated weed management practices during Kharif 2022 and 2023. Eleven treatments targeting weed control were evaluated both at pre and post - emergence stages.&nbsp; 
 
Result: The predominant weeds were Echinochloa colona, Galinsoga parviflora, Cyperus species and other broad leaf weeds were Plantago lanceolata, Trifolium repens, Trianthema species, Ageratum conyzoides. Data on weed dynamics revealed that; after weed-free treatment, the application of Imazethapyr 75 g/ha as PE fb HW at 30 DAS; Pendimethalin 1.0 kg/ha as PE fb HW at 30 DAS and Pendimethalin 1.0 kg/ha + imazethapyr 75 g/ha (PE) recorded a significantly lower total weed count as compared to other treatments. Parameters related to blackgram growth and yield, including plant height, number of branches per plant, pods per plant, grain yield and haulm yield were significantly higher with weed-free treatment followed by application of imazethapyr 75 g/ha as PE fb HW at 30 DAS, remaining at par with application of pendimethalin 1.0 kg/ha + imazethapyr 75 g/ha (PE) and pendimethalin 1.0 kg/ha as PE fb HW at 30 DAS. The most economically efficient weed control method was the combination of pendimethalin 1.0 kg/ha + imazethapyr 75 g/ha (PE), as it resulted in the highest net returns and marginal benefit-cost ratio.

Efficacy of&nbsp; Pre and Post Emergence Herbicides against Complex Weed Flora, Yield and Economics of Blackgram under High Hills Wet Temperate Zone of Himachal Pradesh

<div>Background: Balancing productivity, profitability and environmental health is a key challenge for maintaining agricultural sustainability. The use of locally available agro-inputs in agriculture by avoiding or minimizing the use of synthetically compounded agro-chemicals appears to be one of the probable options to sustain the agricultural productivity. Widespread use of herbicides has resulted in purported environmental and health problems as well as residual toxicity issues in succeeding crops. At present, the awareness on safe food is increasing. So, keeping this point in view the present investigation was carried out to evaluate the influence of organic sources of nutrients and weed management on growth, yield and weed flora of Frenchbean.&nbsp; 
 
Methods:&nbsp;A field experiment was conducted during summer season of 2016 and 2017. The present investigation was laid out in split plot design with six sources of nutrients in main plot and four weed management treatments in sub plots.&nbsp; 
 
Result: Application of treatment T5 recorded significantly higher growth parameters, yield attributes, fresh pod yield, net returns and B:C ratio of French bean which was statistically at par with T3 and T2. Amongst the weed management treatments, treatment W1 resulted in significantly lowest species wise and total weed density and biomass, highest weed control efficiency, lowest weed index, highest growth, yield attributes and fresh pod yield of French bean which was statistically at par with W2 and W0. However, the highest net returns and B:C ratio were obtained in weed free plots.</div>

Weed Dynamics and Productivity of French Bean (Phaseolus vulgaris L.) as Influenced by Organic Sources of Nutrients and Weed Management

Background: Maize is the third most important cereal in India after rice and wheat which contributes nearly 9% in national food basket. Weed infestation is a major problem in maize, primarily at initial growth stages and due to wider spacing, hence weed control is essential to reduce the competition with maize crop. In maize row to row spacing is more so maximum number of weeds appears and compete with main crop. 
 
Methods: A field experiment was conducted in the University Agricultural Farm under the Department of Agronomy in kharif 2019. The soil of the experimental field was sandy loam in texture having pH 6.87 and electrical conductivity 0.32 mmhos/cm. The experiment was comprised of eight treatments and laid out in randomized block design with three replications T0 (Control), T1 (Hand weeding at 20 DAS, 40 DAS), T2 (Atrazine 1 kg/ha after 3 days of sowing), T3 (Metribuzin 1 kg/ha after 3 days of sowing), T4 (Alachlor 1.5 kg/ha after 3 days of sowing), T5 (Atrazine + hand weeding 1 kg/ha (after 3 days and 30 days after sowing), T6 (Metribuzin + hand weeding 1 kg/ha (after 3 days and 30 days after sowing), T7 (Alachlor + hand weeding 1.5 kg/ha (after 3 days and 30 days after sowing). The texture of the experimental field soil was sandy loam having pH-6.87, EC-0.32 mmhos/cm.&nbsp; 
 
Result:&nbsp;The weed species recorded at the experimental site were mainly comprised with grasses, sedges and broadleaf weeds. The dominant weed species infested in the experimental field were: Cynodon dactylon (doob grass), Cyperus rotundus, Amaranthus viridis, Anagallis arvensis, Argemone mexicana, Chenopodium album, Parthenium hysterophorus and Trianthema prolacastrum. Significant reduction in the weed density was recorded in manual weeding. The highest plant height, stem girth, number of leaves, flag leaf length, chlorophyll content, leaf area index, grain yield and stover yield was recorded highest with hand weeding which was followed by T7 (Alachlor + hand weeding 1.5 kg/ha (after 3 days and 30 days after sowing).

Effect of Integrated Weed Management Practices on Weed Dynamics and Performance of Maize Crop

<div>Background: Weeds are the major threat to direct seeded rice and a single strategy of weed control may not be effective for season-long weed control. Intending to accomplish the long-term and sustainable weed management of direct seeded rice, the integration approach of weed management strategies seems a better alternative. The current field study was aimed to evaluate the impact of integration of different weed control methods on direct seeded rice under irrigated ecosystem on weed growth and rice yield.</div>

<div> 
Methods: The experiment was laid out in randomized block design with three replications and twelve treatments during 2017 at G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India. The twelve treatments included the combination of cultural, mechanical, physical and chemical weed management methods.</div>

<div> 
Result: Combination of stale seedbed technique integrated with pre-emergence application of pendimethalin with mechanical weeding at 25 DAS followed by 1 hand weeding at 45 DAS, Sesbania (line sowing) fb application of pendimethalin (PE) fb 1 mechanical weeding at 25 DAS fb 1 hand weeding at 45 DAS, stale seedbed with application of pendimethalin (PE) with Sesbania brown manuring supplemented with mechanical weeding (25 DAS) fb hand weeding at 45 DAS, mulching with wheat straw mulch along with post-emergence application of penoxsulam (20 DAS) fb 1 hand weeding at 45 DAS and application of pendimethalin (PE) fb penoxsulum (PoE) at 20 DAS fb 1 hand weeding at 45 DAS with a row spacing of 25 cm found to be similar in the suppression of weed population and weed density at 40 and 60 DAS and crop yields (4.3, 4.1, 4.2, 4.0 and 4.2 t/ha, respectively) were on par with weed free plot i.e. 4.4t/ha. Application of pendimethalin (PE) fb penoxsulum (PoE) at 20 DAS fb 1 hand weeding at 45 DAS with row spacing of 25cm recorded 93.7%, 90.6% and 4.5% weed control efficiency, weed control index and weed index respectively, which was similar with above integrated weed management treatments. A negative correlation of the weed density and dry matter with the yield of rice was recorded.</div>

​Effect of Integrated Weed Management on Weed and Yield of Direct Seeded Rice

<div style="text-align: justify;">A field experiment was conducted during autumn, 2014 at ICR Farm, Assam Agricultural University, Jorhat, Assam to compare three different direct seeded upland rice varieties along with different integrated weed and nutrient management practices. The experiment was carried out in factorial randomized block design replicated thrice with 15 treatments involving 3 varieties: Inglongkiri, Maizubiron and Rasi along with 5 treatments of weed and nutrient management, i.e. 20-10-10 kg/ha N-P2O5-K2O + &nbsp;pretilachlor @ 750 g/ha followed by grubber 30 DAS (W1), 30-15-15 kg/ha N-P2O5-K2O + pretilachlor @ 750 g/ha followed by grubber 30 DAS (W2), &nbsp;10-5-5 kg/ha N-P2O5-K2O &nbsp;+ pretilachlor @ 750 g/ha followed by grubber 30 DAS + Vermicompost @ 1 t/ha &nbsp; (split equally at sowing &amp; 30 DAS) + Sesbania (Sesbania aculeata) green mulch (up to 30 days) (W3), &nbsp;10-5-5 kg/ha &nbsp;N-P2O5-K2O + pretilachlor @ 750 g/ha followed by grubber 30 DAS with intra-row spacing 15cm (W4), &nbsp;and 20-10-10 kg/ha N-P2O5-K2O + Weedy check (W5). The predominant weed floras observed in the experimental field were Ageratum conyzoides, Cynodon dactylon, Cyperus rotundus and Cyperus iria. Treatment W3 resulted significantly lowest weed population at all growth stages. Weed dry weight was significantly lowest with application of 30-15-15 kg/ha N-P2O5-K2O along with pretilachlor @ 750 g a.i./ha and grubber 30 DAS at 20, 60 DAS and at harvest of rice crop. The results revealed an increase in yields as evident by higher grain and straw yield for all the three varieties with pre-emergence application of pretilachlor (750g a.i./ha) + grubber 30 days after sowing + 30-15-15 kg/ha of N-P2O5-K2O.&nbsp;</div>

Weed dynamics and yield of direct seeded upland autumn rice (oryza sativa l.) Varieties as influenced by integrated weed and nutrient management practices

<div>Background: Weeds are the major biotic constraint to reduce the rice productivity in direct wet seeded rice. Weed infestation and competition are severe in direct wet seeded rice as compared to transplanted rice, because of the simultaneous growth of both crops and weeds. The yield loss due to weeds varies from 40 to 100 per cent in direct seeded rice. Use of herbicides either singly or in combination with manual or mechanical weeding in puddled direct seeded rice has been highlighted by several workers. Use of alternative herbicides with wide spectrum control of the weeds in direct seeded puddled rice is the need of the present time. The present study aimed to evaluate different weed management practices in direct wet seeded rice under sodic soil. 
 
Methods: A field experiment was conducted during Samba season (Rabi) 2016-17. to evaluate the weed management practices in direct wet seeded rice under sodic soil. The treatments comprised of different combination of weed management practices viz., pre emergence, early post emergence herbicides, mechanical weeding and hand weeding twice were tested. Total weed density and weed dry weight, weed control efficiency, yield parameters and yield of rice were recorded.&nbsp; 
 
Result: Among the different weed management practices, the lowest total weed density, total weed dry weight and higher WCE, yield attributes, grain and straw yields were registered under application of PE pyrazosulfuron ethyl 25 g/ha fb EPOE bispyribac sodium 25 g/ha. This was followed by application of PE pretilachlor 0.75 kg/ha fb EPOE bispyribac sodium 25 g/ha.&nbsp;</div>

<div>Weed Dynamics and Productivity of Direct Wet Seeded Rice under Different Weed Management Practices</div>

<div>Background: Maize (Zea mays L.) is the most versatile and emerging food crop of global importance. Weeds are ubiquitous but their presence in wide spaced and initially slow growing crop like maize acts as an obstacle for plentiful harvest. Nutrient uptake by weeds during the first thirty days of maize growth was 59 kg N, 10 kg P2O5 and 59 kg K2O per ha, which was 7-10 times higher than the nutrient uptake by maize. 
 
Methods: The present field experiment was conducted during Rabi, 2018-19 under irrigated conditions at wetland farm of S.V. Agricultural College, Tirupati andhra Pradesh, with ten treatments and three replications in a randomized block design. 
 
Result: Lower density and dry weight of weeds with higher weed control efficiency, lower nutrient uptake by weeds and higher nutrient up take by maize at 80 DAS, kernel and stover yield was recorded with hand weeding twice at 15 and 30 DAS, which was statistically at par with atrazine 1.0 kg ha-1 as PE fb topramezone 30 g ha-1 or tembotrione 120 g ha-1 as PoE or atrazine 1.0 kg ha-1 as PE fb HW at 30 DAS, while these were lowest with weedy check. Higher benefit cost ratio of maize was noticed with both atrazine 1.0 kg ha-1 as PE fb topramezone 30 g ha-1 as PoE (T3), which was in parity with atrazine 1.0 kg ha-1 as PE fb tembotrione 120 g ha-1 as PoE (T2) and hand weeding twice at 15 and 30 DAS (T9). From the present study it may be concluded that atrazine 1.0 kg ha-1 as PE fb topramezone 30 g ha-1 or tembotrione 120 g ha-1 as PoE were considered to be the most effective and economic weed management practices to increase the productivity of Rabi maize at times of labour scarcity.</div>

<div>Weed Dynamics and Nutrient Uptake of Maize as Influenced by Different Weed Management Practices</div>

<div>The present study was conducted in kharif seasons of 2015, 2016 and 2017 at experimental farm of Rajasthan Agricultural Research Institute, Durgapura, Jaipur (Rajasthan) to study efficacy of different weed management practices in clusterbean. Three years result shows that compared to weedy check (6.82 m-2) application of Pendimethalin @ 0.75 kg a.i. ha-1 as PE fb one hand weeding recorded lowest weed density (3.58 m-2). Among herbicidal treatments, Pendimethalin @ 0.75kg a.i/ha as PE fb one hand weeding at 25 DAS (83.7%) and Pendimethalin @ 0.75 kg a.i./ha as PE+ Imazathapyr+ Imazamox @ 40g a.i./ha PoE (74.0%) recorded highest weed control efficiency. Likewise, application of Pendimethalin @ 0.75kg a.i/ha as PE fb one hand weeding at 25 DAS and Pendimethalin 0.75kg/ha at PE fb Imazathapyr + Imazamox @ 40g a.i. ha-1 recorded significantly higher seed (1136 kg ha-1 and 1009 kg ha-1), haulm (3304 kg ha-1 and 2943 kg ha-1) and biological yield (4440 kg ha-1 and 3953 kg ha-1), respectively over other herbicidal treatments. Economic evaluation indicated that application of Pendimethalin @ 0.75kg a.i/ha as PE fb one hand weeding at 25 and which was followed by with Pendimethalin @ 0.75 kg a.i./ha as PE+ Imazathapyr+ Imazamox@ 40g a.i./ha recorded, gross return (INR 55352 ha-1 and INR 49189 ha-1) net returns (INR 38852 ha-1 and INR 34289 ha-1) and B:C ratio (2.35 and 2.20), respectively. Whereas, minimum cost of cultivation (INR 10000 ha-1) and gross returns (INR 25632 ha-1), net returns (INR 15632 ha-1) and B:C ratio (1.56) were recorded under weed check. So looking to the laborious pressure of hand weeding, cost effectiveness ease of application of chemical herbicides, application of Pendimethalin 0.75 kg ha-1 fb one hand weeding can be an effective weed control option in cluster bean crop with higher seed and haulm yield under Semi-arid and Arid regions of Rajasthan.</div>

Weed Flora of Vineyards in Diyarbakır Province, Turkey

Weed Flora Composition in Upland Direct Seeded Rice in Brahmaputra River Ecotones and Edges in Majuli District, Assam

Efficacy of Pre and Post Emergence Herbicides against Complex Weed Flora, Yield and Economics of Blackgram under High Hills Wet Temperate Zone of Himachal Pradesh

Weed Dynamics and Productivity of French Bean (Phaseolus vulgaris L.) as Influenced by Organic Sources of Nutrients and Weed Management

Effect of Integrated Weed Management Practices on Weed Dynamics and Performance of Maize Crop

Effect of Integrated Weed Management on Weed and Yield of Direct Seeded Rice

Weed dynamics and yield of direct seeded upland autumn rice (oryza sativa l.) Varieties as influenced by integrated weed and nutrient management practices

Weed Dynamics and Productivity of Direct Wet Seeded Rice under Different Weed Management Practices

Weed Dynamics and Nutrient Uptake of Maize as Influenced by Different Weed Management Practices

Effect of Different Weed Management Practices on Weed Dynamics, Productivity and Farm Profitability of Cluster Bean