Effect Of Weed Management Practices Research Articles

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.

Integrated Weed Management in Summer Sesame (sesumun indicum L.)

A field research was evaluated at the Seed Technology, S. D Agricultural University, Sardarkrushinagar-385506, Banaskantha (North Gujarat) in the year between summer 2019 to 2021 to study the effect of weed management practices in summer sesamum. Experimental plot was loamy sand in texture with low organic carbon and available N, medium in available P2O5 and high in available K2O.
 Treatments were weed free (IC fb HW at 20 and 40 DAS), weedy control, pendimethalin 30 EC 0.750 kg/ha PE application fb IC+HW at 30 DAS, pendimethalin 30 EC1.0 kg/ha PE application fb IC+HW at 30 DAS, oxadiargyl 6 EC 75 g/ha PE fb IC + HW at 30 DAS, oxadiargyl 6 EC 90 g / ha PE fb IC+HW at 30 DAS, quizalofop-ethyl 5 EC 40 g/ha PoE 20 DAS fb IC+ HW at 40 DAS, quizalofop-ethyl 5 EC 50 g/ha PoE at 20 DAS fb IC+ HW at 40 DAS, pendimethalin 30 EC 0.75 kg/ha PE fb quizalofo-pethyl 5 EC 40 g/ha at 30 DAS and pendimethalin 30 EC 1.0 kg/ha PE fb quizalofop-ethyl 5 EC 40 g/ha at 30 DAS.
 The results revealed that significantly maximum seed yield (0.90 t/ha), stalk yield (2.14 t/ha), number of capsules per plant (73.1) and number of branches per plant (5.2) were obtained under weed free (IC fb HW at 20 and 40 DAS) treatment with maximum net realization (₹52322/ha).
 Minimum weed density at harvest/m2 and weed dry weight/m2 (67.17/m2 and 32.51g/m2) and maximum weed control efficiency (71.62%) were found under weed free (IC fb HW at 20 and 40 DAS).

The Effect of Weed Management Practices on the Growth, Yields and Productivity of Wheat (Triticum aestivum L.)

A field experiment entitled “Effect of weed management practices on growth, yield and productivity of wheat (Triticum aestivum L.)’’ was conducted at Agronomy Research Farm of Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (Uttar Pradesh) during Rabi season 2018-2019. The experiment was laid out in randomized block design with three replications. There were twelve treatments of weed management practices, namely: T1 - Sulphosulfuron 25g a.i. ha-1; T2 - Metsulfuron 4g a.i. ha-1; T3 - Clodinofop 60g a.i. ha-1; T4 - Metribuzin 210g a.i. ha-1; T5 - Sulphosulfuron+Metsulfuron (30+2) 32 g a.i. ha-1; T6 - Sulphosulfuron+Metribuzin (25+210) 235 g a.i. ha-1; T7 - Clodinofop+ Metsulfuron (60+4) 64 g a.i. ha-1; T8 - Fenoxaprop–p–ethyl 120 g a.i. ha-1; T9 - Fenoxaprop-p-ethyl + Metsulfuron (120+4) 124 g a.i. ha-1; T10 - Two hand weeding at 20, 40 DAS; T11 - Weedy check; T12 - Weed free. From the results, all the growth parameters (or yield attributes) like; higher number of spike (m-2), Length of Spike (cm), number of spikelet Spike-1, Grain per ear head (m-2), and Test Weight (g) plus yields of grain and straw, as well as higher harvest index of wheat obtained were significantly higher under weed free treatment of 52.50 qha-1 followed by under T7 - Clodinofop+ Metsulfuron @ (60+4) 64 g a.i. ha-1 at an obtained yield of wheat is 51.10 qha-1. The highest net return (81054.50 Rs. ha-1) and benefit cost ratio (2.04) was recorded under T7 - Clodinofop + Metsulfuron @ (60+4) 64 g a.i. ha-1. Thus it may be recommended for effective control of weeds and higher production of grain and straw yield in wheat crops.

Effect of Weed Management Practices on Growth, Yield and Quality of Okra [Abelmoschus esculentus (L.) Moench

The present investigation entitled “Effect of weed management practices on growth, yield and quality of okra Abelmoschus esculentus (L.) Moench)” was conducted at Vegetable Research Farm, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur during kharif season 2022. The experiment was laid out in Randomized Block Design with seven different treatments viz. T1 = Pre-emergence application of Pendimethalin @ 6 ml /L, T2= Post emergence application of Quizalofop-ethyl @ 0.040 kg/ha ,T3 = Pre-emergence application of pendimethalin @ 6 ml/L + one hand weeding at 40 DAS , T4 = Post emergence application of Quizalofop-ethyl @ 0.040 kg ha-1 at 25 DAS + one hand weeding , T5 = Pendimethalin @ 6 ml /L as pre-emergence + Quizalofop-ethyl @ 0.040 kg ha-1 at 25 DAS , T6 = Weed free check (Three hand weeding) 20, 40 and 60 DAS , T7 = weed check control replicated thrice. The result of the study revealed that at 30 DAS maximum plant height (30.96cm) was reported in treatment T3 : Pre-emergence application of Pendimethalin @ 6 ml/L + one hand weeding at 40 days of sowing whereas at 60 and 90 DAS maximum plant height (75.50 and 113.53 cm) was reported in T6 : Weed free check (Three hand weeding) 20, 40 and 60 DAS. Maximum number of branches per plant (4.60)at 60 DAS was found in T3 : Pre-emergence application of Pendimethalin @ 6 ml/L + one hand weeding at 40 DAS and 90 DAS maximum number of branches per plant (5.86) was reported in T6 : Weed free check (Three hand weeding) 20, 40 and 60 DAS. Maximum number of nodes (17.83 ) at 60 days after sowing was noticed in treatment T3 = Pre-emergence application of Pendimethalin @ 6 ml/L + one hand weeding at 40 DAS and 90 Days after of sowing maximum number of nodes () was in treatment T6 = Weed free check (Three hand weeding) 20, 40 and 60 DAS. Maximum Pod diameter( 1.74cm) , fruit weight (12.88gm ), pod length( 14.1cm) , number of pods per plant( 25.66 ) , pod yield per plant ( 304.73gm) , pod yield per hectare (16.91 t), TSS( 3.2 Brix), crude fibre (8.46%) and cholorophyll content (1.18 mg) and relative cholorophyll content (54.39) .

Effect of Weed Management Practices on Growth and Yield of Zero-Till Chickpea (Cicer arietinum L.)

A field experiment to compare weed management practices on growth and yield of zero till chickpea (Cicer arietinum L.) during rabi, 2022 at RARS, Jagtial, Telangana. Treatments include Pendimethalin 38.7 % CS @ 700 g a.i. ha-1 , Topramezone 33.6 % SC @ 20.6 g a.i. ha-1 , Quizalofop ethyl 7.5 % + Imazethapyr 15 % EC @ 100 g a.i. ha-1, T4- Propaquizafop 2.5 % + Imazethapyr 3.75 % (w/w) ME @ 125 g a.i. ha-1 , two hand weedings at 15 and 30 DAS , weed free (Season long) and Un-weeded (Check). Weed free treatment and hand weeded plots showed highest growth and yield attributing characters because of season-long weed-free conditions and better microclimate during critical period of crop respectively. Among different herbicides, Topramezone treated plot recorded higher growth parameters viz.; plant height (38.7 cm), dry matter accumulation (320.8 g m-2) and yield attributing characters viz.; total number of pods plant-1 (30.97), with seed yield (1397 kg ha-1), haulm yield (2518 kg ha-1) and harvest index (35.7 %). Post emergence herbicide topramezone can be effectively adopted for getting higher yield of chickpea in rice fallow zero tillage conditions.

Trouble in the rice field: Distribution ecology and indicator value of weed species in the rice fields of Himalayan region

Field-based evaluation of indicator weed species in agriculture systems is effective for developing site-specific weed management. Because of anthropogenic activities and climate change, new weeds are invading agricultural fields. The current study examined the weed species in agricultural fields with a focus on diversity, distribution ecological patterns, and identification of indicator species, all of which might help in effective weed management practices. Following the calculation of the Importance Value Index for each weed species, ordination, and indicator species analysis were conducted. We collected vegetation data through random sampling, and the current study recorded 47 species, taxonomically distributed across 41 genera and 19 families. Asteraceae with 13% of species was the leading family followed by Poaceae, and Brassicaceae (11% each). Annual weed species with 49% were the dominant life span category. The phytogeographical analysis revealed that the highest number (28 species) recorded from the study area were native, while 19 species were alien. Of the total alien species, 4 were invasive, and 14 were naturalised and one species Bassia scoparia was casual. The diversity indices show significant differences (p ≤ 0.05) in weeds in rice fields recorded from the study area. Detrended correspondence analysis grouped the species Geranium rotundifolium, Sisymbrium loeselii, Mentha longifolia, Rumex dentatus, Amaranthus viridis on the extreme left side suggest a low score on axis 1 and a high score on axis 2. The analysis of indicator species revealed a significant difference (p ≤ 0.05) in agriculture fields across the sampled sites. According to the indicator species analysis, Poa annua, Persicaria hydropiper, Ranunculus sceleratus, and Echinochloa colona were the key weed species found in the study area. This investigation might aid weed management strategies to minimize crop losses and increase of rice production to fulfill the current food requirement.

Effect of Weed Management Practices on growth and Yield of Sesame (Sesamum indicum l.)

Effect of Weed Management Practices on growth and Yield of Sesame (Sesamum indicum l.)

Assessing the Effect of Weed Management Practices on Weed Flora, Growth and Yield of Fodder Maize (Zea mays L.)

A field experiment was conducted at Research Farm, AICRP on Forage Crops, Department of Agronomy, JNKVV, Jabalpur (Madhya Pradesh) during of the year 2019. The main objective of the experiment was to find out the effect of different weed control treatments on complex weed flora in fodder maize. Ten treatments were tested in randomized block design with three replications. Treatments consisted of pre-emergence application of atrazine 1000 g/ha, pendimethalin 750 g/ha, atrazine 750 g/ha + pendimethalin 750 g/ha and post emergence application of 2, 4-D 500 g/ha, tembotrione 120 g/ha, topramezone 35 g/ha, tembotrione 120 g/ha + atrazine 250 g/ha, topramezone 35 g/ha + atrazine 250 g/ha, hand weeding twice at 20 and 40 DAS and weedy check. Weed intensity and dry matter accumulation by weeds were recorded species wise and then the effectiveness of weed management and the weed control efficiency were calculated. In maize field, the predominated weeds were Echinochloa colona, Commelina communis, and Digitaria sanguinalis among monocots, Phyllanthus niruri and Eclipta alba among dicots along with a respectable sum of numerous minor weeds. Experimental results indicated that hand wedding has recorded highest weed control efficiency (88.64%) followed by PoE application of topramezone 35 g/ha + atrazine 250 g/ha (74.38%) and tembotrione 120 g/ha + atrazine 250 g/ha (68.31%). All weed control treatments significantly affected the plant height, LAI, stem girth and leaf: stem ratio of crop. Among different herbicidal treatments, topramezone 35 g/ha + atrazine 250 g/ha was found significantly superior and gives highest green fodder yield (47.26 t/ha), dry fodder yield (13.64 t/ha), crude protein yield (1.51 t/ha), net monetary returns (Rs. 44824/ha) and B: C ratio (2.72). Thus, herbicide application of topramezone 35 g/ha + atrazine 250 g/ha was found more reliable to control complex weed flora of fodder maize with higher green fodder yield and net returns.

Effect of Weed Management Practices on Nutrient Uptake and Economics of Mustard (Brassica juncea)

Effect of Weed Management Practices on Nutrient Uptake and Economics of Mustard (Brassica juncea)

Effect of weed management practices under irrigated condition growth and yield of field pea (Pisum sativum L)

Field pea (Pisum sativum L) crop was conducted at the Agricultural Research Farm of B. H. U. Varanasi, during rabi season of 2010-11. The experiment was conducted in randomized block design (RBD) with 10 weed control treatments viz., pendimethalin 1.0 kg ha-1 (PE), pendimethalin 1.0 kg (PE) + imazethapyr 75 g ha-1 (PoE), quizalofop- ethyl 60 g ha-1 (PoE), quizalofop- ethyl 50 g ha-1 (PoE), imazethapyr 75 g ha-1 (PoE), imazethapyr 50 g ha-1 (PoE), chlorimuron- ethyl 4 g ha-1 (PPI), pendimethalin 1kg ha-1 (PE) + imazethapyr 50 g ha-1 (PoE) and weed free (HW at 30 and 60 DAS) were compared with weedy check and two irrigation were given to crop at critical stages of crop growth. The soil of experimental field application recommended dose of fertilizer at the time of sowing and soil sandy clay loam in texture, with slightly alkaline in reaction (pH 7.8). Field pea variety HUDP-15 was sown at row spacing of 30 cm apart on 11 November 2010. The observation on weed density and weed dry matter accumulations were recorded at 30, 60 and 90 DAS. Weed control efficiency was calculated at maximum weed dry weight stage (60 DAS) of crop growth. Among herbicidal treatments, sequential application of pendimethalin 1kg ha-1 (PE) + imazethapyr 50 g ha-1 (PoE) was proved to be the most effective in reducing the weed density and dry weight. It also recorded maximum weed control efficiency and lower weed index. The Observation on plant height, and yield attributes viz., pods plant-1, grains pod-1, seed index (100-grain weight), grain and straw yield. The crop growth, yield attribute, grain and straw yield, were maximum in pendimethalin 1kg ha-1 (PE) + imazethapyr 50 g ha-1 (PoE) treated plot followed by pendimethalin 1kg ha-1 (PE) + imazethapyr 75 g ha-1 (PoE) and quizalofop- ethyl 60 g ha-1 (PoE).

Effect of weed management practices on weeds and productivity of timely sown wheat (Triticum aestivum L.)

Effect of weed management practices on weeds and productivity of timely sown wheat (Triticum aestivum L.)

Effect of weed management practices on seed yield of berseem (Trifolium alexandrinum L.)

Effect of weed management practices on seed yield of berseem (Trifolium alexandrinum L.)

Effect of weed management practices on weeds and productivity of wheat (Triticum aestivum L.)

Effect of weed management practices on weeds and productivity of wheat (Triticum aestivum L.)

Effect of weed management practices on growth and productivity of pigeonpea under greengram/ blackgram intercropping systems

Effect of weed management practices on growth and productivity of pigeonpea under greengram/ blackgram intercropping systems

Effect of weed management practices on chilli yield in chattogram hill districts of bangladesh

Effect of weed management practices on chilli yield in chattogram hill districts of bangladesh

Effect of weed management practices and foliar application of α-Tocopherol on the productivity and oil characteristics of an Egyptian peanut cultivar

Effect of weed management practices and foliar application of α-Tocopherol on the productivity and oil characteristics of an Egyptian peanut cultivar

Impact of Weed Management Practices on the Weed Dynamics, Nutrient Uptake Pattern of Weeds and Direct Seeded Rice

Herbicide based weed management is the emerging and effective method for controlling the weed flora of direct seeded rice. Weed growth often has an impact on crop development by interfering with plant nutrients. A two-year weed experiment with twelve treatments was set up at the University of Agricultural Sciences in Bangalore, Karnataka, India to know the effect of weed management practices on weed and nutrient dynamics in direct seeded rice. Significantly lower total weed density and biomass was observed with bispyribac sodium 10 SC 40 g a.i. ha-1 as post emergence which recorded statistically at par values with bensulfuron methyl + pretilachlor 6.6 GR 660 g a.i. ha-1 as pre-emergence during both the years of study. The allelochemicals used in the study performed well over unweeded control but it was far less when compared with chemical herbicides. Nutrient uptake by the direct seeded rice (82.17, 31.76 and 68.83 kg ha-1 NPK in 2020 and 89.38, 38.84 and 75.62 ha-1 NPK in 2021, respectively) and grain yield (4.98 t ha-1 in 2020 and 4.99 t ha-1 in 2021, respectively) was also reported to be higher with bispyribac sodium 10 SC 40 g a.i. ha-1 as post emergence which was on par with bensulfuron methyl + pretilachlor 6.6 GR 660 g a.i. ha-1 as pre-emergence. As the nutrient uptake by the crop and weeds are negatively correlated, the same treatments have recorded lower nutrient removal by the weeds. Higher weed biomass and rapid nutrient removal by weeds had resulted in poor soil nutritional status in unweeded control compared to all other treatments. Application of bispyribac sodium 10 SC 40 g a.i. ha-1 as post emergence or bensulfuron methyl + pretilachlor 6.6 GR 660 g a.i. ha-1 as pre-emergence were considered to be best management practices for weed management under direct seeded rice.

Nutrient uptake by weeds and soybean crop as influenced by weed management practices in Vertisols

A field experiment was conducted during kharif season of 2021 to study the effect of weed management practices on uptake of nutrients by weed and soybean at Kota (Rajasthan). The results indicated that weeds in soybean depleted the soil fertility by removing 69.2 kg ha-1 N, 12.4 kg ha-1 P and 76.7 kg ha-1 K under unweeded check. All weed management practices reduced weed dry matter and nutrient uptake by weeds at 30 and 60 days after sowing (DAS). Two hand weedings and ready mixture of fomesafen + fluazifop-p-butyl @ 220 g a.i. ha-1 proved significantly superior in reducing weed dry matter and nutrient uptake by weeds at 30 and 60 DAS over rest of the treatments. All weed control measures significantly enhanced seed and straw yield of soybean over weedy check. Two hand weedings and mixture of fomesafen + fluazifop-p-butyl @ 220 g a.i. ha-1 , sodium acifluorfen + clodinafop-propargyl @ 245 g a.i. ha-1 and propaquizafop + imazethapyr @125 g a.i. ha-1 as post emergence (PoE) were at par and were found to be significantly superior over rest of the treatments in enhancing seed and straw yield. Ready mix application of fomesafen + fluazifop-p-butyl @ 220 g a.i. ha-1 , propaquizafop + imazethapyr @ 125 g a.i. ha-1 and sodium acifluorfen + clodinafop-propargyl @ 245 g a.i. ha-1 (PoE) significantly reduced the NPK uptake by total weeds and significantly improved nutrient uptake by soybean and consequently resulted higher seed yields.

Effect of weed management practices on weed control efficiency, yield, nutrient uptake and economics of summer maize (Zea mays) under humid tropic conditions ​

Weed management is the most challenging component of summer maize cultivation. Weeds that are not controlled compete for light and the crop’s nutrient and water resources, and yield losses may be up to 70% of the potential yield. The critical time for weed control in maize is between crop emergence and canopy closure. Therefore, a field experiment was conducted during summer, 2019 at the N. M. College of Agriculture Farm, Navsari Agricultural University, Gujarat, India to find effective weed management practice in summer maize cultivation. The treatments included various weed management strategies where pre and post emergence herbicides were either sprayed or integrated with hand weeding. The results revealed significantly higher grain and straw yield (6473 and 8041 kg/ha, respectively) with weed free, which was statistically at par with pendimethalin (CS) @ 1.5 kg/ha as pre-emergence (PE) + 1 hand weeding (HW) at 30 days after sowing (DAS). Among the weedicide treatments, minimum weed population at harvest, least dry weight of weeds, lowest weed index, highest weed control efficiency and maximum benefit cost ratio was recorded in pendimethalin (CS) @ 1.5 kg/ha as PE + 1 HW at 30 DAS) which was followed by treatment T5 (Pendimethalin EC @ 1.0 kg/ ha as PE +1 HW at 30 DAS). Maximum nitrogen, phosphorus and potassium content in grain and straw was recorded in weed free plots which was statistically at par with treatment T6 where Pendimethalin (CS) @ 1.5 kg/ha was applied as pre-emergence and integrated with one hand weeding thirty days after sowing.