Carfentrazone Ethyl Research Articles

Effect of irrigation and weed management practice on available nutrients, nutrient concentration and their uptake by weeds and wheat

A field experiment was conducted in sandy loam soil during winter season of 2017-18 and 2018-19. Significantly the lowest weed biomass production, highest available nutrients in soil and the maximum N and K content in weeds and crop was recorded with the application of irrigation at CRI+ active tillering stage. Whereas, irrigation at CRI+jointing+ booting+ flowering+milking stage was recorded maximum P content. Application of broadway (carfentrazone ethyl 20% + sulfosulfuron 25%WG) 100 g a.i. ha-1 at 35 DAS recorded significantly lowest weed biomass and the highest nutrient content in weeds and crop. Application of irrigation at CRI+jointing+ booting+ flowering+milking stage was recorded significantly the highest nutrients depletion by weeds and their uptake by crop. Significantly the lowest nutrients depletion by weed and their highest uptake of crop and the maximum available nutrients in soil were recorded with the application of broadway (carfentrazone ethyl 20% + sulfosulfuron 25%WG) 100 g a.i. ha-1 at 35 DAS. Grain (9.79 kg ha-1) and straw yield (4.54 kg ha-1) will be reduced by an increased in unit of nutrients depletion by weeds.

Carfentrazone-ethyl resistance in an Amaranthus tuberculatus population is not mediated by amino acid alterations in the PPO2 protein.

To date, the only known mechanism conferring protoporphyrinogen IX oxidase (PPO)-inhibitor resistance in waterhemp (Amaranthus tuberculatus) is a glycine deletion in PPO2 (ΔG210), which results in cross-resistance to foliar PPO-inhibiting herbicides. However, a metabolism-based, HPPD-inhibitor resistant waterhemp population from Illinois (named SIR) was suspected of having a non-target site resistance (NTSR) mechanism due to its resistance to carfentrazone-ethyl (CE) but sensitivity to diphenylethers (DPEs). In greenhouse experiments, SIR sustained less injury than two PPO inhibitor-sensitive populations (WCS and SEN) after applying a field-use rate of CE, and after initial rapid necrosis, regrowth of SIR plants was comparable to a known PPO inhibitor-resistant population (ACR) possessing the ΔG210 mutation. Dose-response analysis determined 50% growth reduction rates in CE-resistant (SIR and ACR) and sensitive (SEN) waterhemp populations, which showed SIR was 30-fold resistant compared to SEN and two-fold more resistant than ACR. Deduced amino acid sequences derived from SIR PPX2 partial cDNAs did not contain the ΔG210 mutation found in ACR or other target-site mutations that confer PPO-inhibitor resistance previously reported in Palmer amaranth (Amaranthus palmeri). Although several SIR cDNAs contained amino acid substitutions, none were uniform among samples. Additionally, SIR plants treated with malathion and CE showed a significant reduction in biomass accumulation compared to CE alone. These results indicate robust CE resistance in SIR is not mediated by amino acid changes in the PPO2 protein, but instead resistance may be conferred through a NTSR mechanism such as enhanced herbicide metabolism.

Multiresidue Method for GC-MS Amenable Multiclass Pesticides in Pineapple Fruit

A simple, rapid QuEChERS method is reported for simultaneous analysis of 86 multiclass pesticides in pineapple fruit. Based on a comparative recovery by three methods, the one involving ethyl acetate extractant and dSPE clean up with 50 mg PSA and 150 mg anhydrous sodium sulphate was found more appropriate and further validated following SANTE guidelines. The coeffiicient of determination (R2) value of all the pesticides ranged between 0.97–0.99. Limit of quantification (LOQ) of most of the compounds was10 ng g−1. Bifenox, bitertanol, carfentrazone ethyl, chlorfenvinphos, flusilazole, haloxyfop methyl, methamidophos, methyl paraxon, paclobutrazole and pyraclostrobin showed a higher LOQ of 50 ng g−1. Average recovery ranged within 70–120 per cent at 10, 50 and 100 ng g−1 fortification levels with RSDr, RSDwR below 20 per cent; Horwitz ratio between 0.5–2 at LOQ proved that this method is sufficiently accurate, repeatable and reproducible and therefore can be effectively utilized for pesticide residue analysis in pineapple fruits.

Ammonium Glufosinate Associated with Post-Emergence Herbicides in Corn with the cp4-epsps and Pat Genes

ABSTRACT: With the possibility of using ammonium glufosinate in corn, studies on its association with other herbicides are essential. The aim of this study was to assess weed control and herbicide selectivity in association with ammonium glufosinate in corn containing the pat and cp4-epsps genes. The experiment was carried out under field conditions in two sites in a randomized block design with four replications. Treatments consisted of ammonium glufosinate, glyphosate, ammonium glufosinate + glyphosate, ammonium glufosinate + nicosulfuron, ammonium glufosinate + atrazine, ammonium glufosinate + tembotrione, ammonium glufosinate + mesotrione, ammonium glufosinate + carfentrazone ethyl, ammonium glufosinate + bentazon, ammonium glufosinate + 2,4-D, control without weeding, and hand-weeded control. Visual assessments were performed regarding damage, electron transport rate in photosystem II (ETR), ammonia quantification, height, and grain yield of corn plants, as well as weed control at both sites. The application of ammonium glufosinate and its associations did not provide a reduction in productivity when compared to the hand-weeded control. Some treatments presented higher levels of visual damage and ammonia accumulation, but without a yield reduction. Therefore, herbicide mixture with ammonium glufosinate may be an alternative to weed control without damaging corn crop, which presents in its genetic constitution the cp4-epsps and pat genes.

Efficacy Evaluation of Fertilizers and Weed Control Practices to Mitigate Wheat Nutrient and Yield Losses

ABSTRACT: Low fertilizer use efficiency due to inappropriate weed control practices is one of the main causes of poor wheat yield worldwide. A 2 year field experiment was conducted to study the effects of three fertilizer levels and four weed control practices on fertilizer use efficiency and nutrient uptake by wheat and its associated weeds. Fertilizer levels were F0 (zero fertilizer), F1 (75 kg ha-1 N + 50 kg ha-1 P2O5), and F2 (150 kg ha-1 N + 100 kg ha-1 P2O5) and weed control included W1 (weedy check), W2 (pendimethalin applied at 1,031 g a.i. ha-1), W3 (isoproturon + carfentrazone ethyl applied at 750 g a.i. ha-1) and W4 (manual weed control). Different weed control practices significantly reduced the NPK uptake by weeds and increased NPK uptake by wheat. Maximum uptake of NPK by wheat and minimum uptake by weeds were recorded in W4. Increasing dose of fertilizer increased NPK uptake by both weeds and wheat. However maximum fertilizer use efficiency and grain yield of wheat were achieved when highest dose of fertilizers (F2) was used along with manual weed control method (W4), which was followed by F2 and W3 during both years. We have come to the conclusion that to achieve higher wheat yield by increasing fertilizer doses, farmers should take appropriate weed control measures.

The sensitivity of soil enzymes, microorganisms and spring wheat to soil contamination with carfentrazone-ethyl

ABSTRACTHerbicides pose a significant threat to the natural environment, in particular in soils that are most exposed to plant protection agents. Prolonged herbicide use leads to changes in soil metabolism and decreases soil productive potential. In this study, the influence of carfentrazone-ethyl (CE) on the microbiological and biochemical properties of soil and the yield of Triticum aestivum L. was evaluated. Carfentrazone-ethyl was applied to sandy loam (pHKCl – 7.0) in doses of 0.000, 0.264, 5.280, 10.56, 21.18, 42.24, 84.48 and 168.96 µg kg−1 DM soil. Soil samples were subjected to microbiological and biochemical analyses on experimental days 30 and 60. Carfentrazone-ethyl disrupted the biological equilibrium in soil by decreasing the abundance and biodiversity of soil-dwelling microorganisms, the activity of soil enzymes, the values of the biochemical activity indicator and spring wheat yields. Carfentrazone-ethyl had the most adverse effects when applied in doses many fold higher than those recommended by the manufacturer. The toxic effects of CE were also determined by its soil retention time. Soil treated with CE was characterized by higher counts of oligotrophic bacteria, organotrophic bacteria, bacteria of the genus Azotobacter, actinomycetes and fungi on day 60, and spore-forming oligotrophic bacteria on day 30. The activity of dehydrogenases, urease, alkaline phosphatase and β-glucosidase was higher on day 30 than on day 60.

Efficacy of Herbicides in Controlling Weeds in Mungbean (<i>Vigna radiata</i> L. Wilczek) Field

A field experiment was conducted at the Pulse Research Centre of Bangladesh Agricultural Research Institute, Ishurdi, Pabna during Kharif-II season of 2010 to evaluate the efficacy of five herbicides for controlling weeds associated with mungbean (BARI Mung-6). The five herbicides such were: Paraxon (27.6% WV Paraquat dichloride salt), M-clor 5G (Butaclor), Topstar 40 WP (40% Oxadiargyl), Hammer 24 EC (Carfentrazone ethyl), and Panida 33 EC (Pendimethalin) with one control (no herbicide and also no weeding). Weed was collected species wise during weeding at 40 days after sowing from 1 m2 area of each plot and oven dried to estimate weed growth. Among the herbicides, Panida performed the best for reducing the number and dry weight of weeds. The maximum reduction of weed population, the highest weed control efficiency, seed yield (1222 kg ha-1), and maximum economic benefit were also obtained in the treatment receiving Panida 33 EC @ 2 ml L-1.The Agriculturists 2015; 13(1) 127-132

The effect of carfentrazone-ethyl on soil microorganisms and soil enzymes activity / Wpływ karfentrazonu etylu na mikroorganizmy i aktywność enzymów glebowych

Abstract The aim of this study was to determine the effect of carfentrazone-ethyl (CE) doses of 0.265, 5.280, 10.560, 21.180, 42.240 μg kg-1 soil DM on fungi, Acnomycetes, organotrophic bacteria, total oligotrophic bacteria and spore-forming oligotrophic bacteria, and on the activity of dehydrogenases, catalase, urease, alkaline phosphatase, acid phosphatase, arylsulfatase and β-glucosidase. Carfentrazone-ethyl had a stimulating effect on total oligotrophic bacteria and organotrophic bacteria, but it inhibited the growth of Azotobacter, fungi, spore-forming oligotrophic bacteria and Actinomycetes. The analyzed substance modified the structure of soil microbial communities, and it induced the most profound changes in fungi. The highest values of the colony development (CD) index and the eco-physiological (EP) index were observed in organotrophic bacteria. The optimal dose of carfentrazone-ethyl stimulated the activity of dehydrogenases, catalase, urease, alkaline phosphatase, acid phosphatase and β-glucosidase, but it had no effect on arylsulfatase. The highest doses of the analyzed substance inhibited the activity of dehydrogenases (reduction from 11.835 to 11.381 μmol TPF), urease (reduction from 0.545 to 0.500 mmol N-NH4) and arylosulfatase (reduction from 0.210 to 0.168 mmol PNP). Dehydrogenases were most resistant to CE, whereas acid phosphatase and arylsulfatase were least resistant to the analyzed compound

Efeito da aplicação de herbicidas dessecantes na soja sobre as populações de nematoides no solo

The use of herbicides is the main method of weed control in soybeans. Desiccants are also being used routinely to anticipate the harvest and / or minimize the deterioration of seed quality. There is the possibility of direct or indirect contact with such pesticides, affect the community of nematodes in the soil. However, such effects and their magnitudes are yet to be clarified, especially in the case of selective herbicides. Thus, the objective of this study was to evaluate the use of selective herbicides in soybean on nematodes harmful to the crop. The experiment was conducted with transgenic soybean (‘M-SOY 7908RR’). The experimental design was a randomized block design with the following treatments: paraquat (400 g a.i ha-1), diquat (200 g a.i ha-1), a mixture of paraquat and diquat (300 + 150 g a.i ha-1), two doses of carfentrazone ethyl (20 g a.i ha-1 and 30 g a.i ha-1) and control (without desiccant application). The nematode community in the area was monitored in four periods. In none of those was found significant variation in the populations of nematodes harmful to soybeans, due to the application of any of desiccants. However, especially in the last sampling time, the desiccant application always resulted in increased populations of free-living nematodes and parasites those considered weak for soybean.

Efeito da aplicação de herbicidas dessecantes na soja sobre as populações de nematoides no solo

The use of herbicides is the main method of weed control in soybeans. Desiccants are also being used routinely to anticipate the harvest and / or minimize the deterioration of seed quality. There is the possibility of direct or indirect contact with such pesticides, affect the community of nematodes in the soil. However, such effects and their magnitudes are yet to be clarified, especially in the case of selective herbicides. Thus, the objective of this study was to evaluate the use of selective herbicides in soybean on nematodes harmful to the crop. The experiment was conducted with transgenic soybean (‘M-SOY 7908RR’). The experimental design was a randomized block design with the following treatments: paraquat (400 g a.i ha-1), diquat (200 g a.i ha-1), a mixture of paraquat and diquat (300 + 150 g a.i ha-1), two doses of carfentrazone ethyl (20 g a.i ha-1 and 30 g a.i ha-1) and control (without desiccant application). The nematode community in the area was monitored in four periods. In none of those was found significant variation in the populations of nematodes harmful to soybeans, due to the application of any of desiccants. However, especially in the last sampling time, the desiccant application always resulted in increased populations of free-living nematodes and parasites those considered weak for soybean.

Reakcja komosy białej (Chenopodium album L.) na zróżnicowane dawki herbicydów stosowanych w zbożach jarych

In the years 2007–2011 in the field conditions the evaluation of herbicides’ efficacy used at reduced doses for control of Chenopodium album was tested. Nine herbicides recommended for weed control in spring cereals (wheat and barley) were used in investigation. Each of them was applied at maximum recommended dose (100%) and at three lowered doses (75, 50 and 25%). The herbicides were applied in the spring at BBCH 12–16 growth stage of Ch. album. The best results in controlling of Ch. album were achieved with the following products: tribenuron methyl applied with adjuvant, mixtures 2,4‐D + fluroxypyr and MCPA + fluroxypyr (in the range of all tested doses), mixtures 2,4‐D + dicamba, 2,4‐D + florasulam, mecoprop + MCPA + dicamba (in the dose reduced by 50%), and mixture mecoprop + carfentrazone ethyl (in the dose reduced by 25%). Two of the tested herbicide mixtures of amidosulfuron + iodosulfuron and metribuzin + amidosulfuron should be used in full recommended dose for effective control of Ch. album. W latach 2007–2011 w warunkach polowych, oceniano skuteczność zwalczania Chenopodium album przez herbicydy stosowane w obniżonych dawkach. W badaniach użyto 9 herbicydów zalecanych do odchwaszczania zbóż jarych (pszenica i jęczmień). Każdy z nich był stosowany w maksymalnej zalecanej dawce (100%) oraz trzech dawkach obniżonych (75, 50 i 25%). Herbicydy były stosowane wiosną w fazie BBCH 12–16 Ch. album. Najlepsze rezultaty w zwalczaniu Ch. album zapewniały tribenuron metylu stosowany z adiuwantem oraz mieszaniny 2,4‐D + fluroksypyr i MCPA + fluroksypyr (w zakresie wszystkich badanych dawek), mieszaniny 2,4‐D + dikamba i 2,4‐D + florasulam, mekoprop + MCPA + dikamba (w dawce ograniczonej o 50%) oraz mieszanina mekoprop + karfentrazon etylu (w dawce ograniczonej o 25%). Dwie z badanych mieszanin amidosulfuron + jodosulfuron oraz metrybuzyna + amidosulfuron dla skutecznego zwalczania Ch. album powinny być stosowane w pełnych zalecanych dawkach.

Integrated Weed Management Through Tillage and Herbicides for Wheat Production in Rice-Wheat Cropping System in Northwestern Pakistan

Conservational tillage (CT) in combination with broad spectrum herbicide may be more efficient and economical in controlling weeds, reducing cost of cultivation, and enhancing wheat yield. Field experiments were carried out to evaluate the effect of tillage and herbicides on weeds and wheat yield under rice-wheat cropping system (RWCS). The results indicated that broad spectrum herbicides particularly, carfentrazone ethyl ester + isoproturon (Affinity 50 WDG) reduced weeds density by 93 and 95% compared to control and also produced the maximum grain yield (6818 and 6996 kg ha−1) and HI (harvest index, 44.7 and 44.6%) in 2007-2008 and 2008-2009 growing seasons, respectively. The maximum weeds infestation and the lowest yield were recorded in control. Tillage methods significantly influenced grain yield and HI, while no significant effect on all other parameters. The overall mean yield was significantly higher in zero tillage (5575 kg ha−1) and reduced tillage (5584 kg ha−1) compared to CT (5479 kg ha−1). Besides increasing wheat yield, Affinity 50 WDG and zero tillage are important weed management practices that can be integrated into wheat production in RWCS. However, in case of perennial weeds or insect pests' infestation, CT in combination with Affinity 50 WDG would be more productive than conservation tillage.

English

  Weeds are one of the most important factors that impose a great threat to the crop yield. In order to alleviate the weeds infestation in wheat (Triticum aestivum L.), the efficacy of various pre and post-emergence herbicides were tested during Rabi 2009 to 2010 at the Agronomic Research Area, University of Agriculture, Faisalabad, Pakistan. Results promised that clodinafop propargyl at 0.045 kg a.i. ha-1 with maximum weed kill efficiency severely reduced the Avena fatua, Coronopus didymusand Melilotus indica population and dry weights compared with the control. Poor weed control was achieved using isoproturon at 1.5 kg a.i. ha-1, isoproturon + diflufenicon at 0.98 kg a.i. ha-1, fenoxaprop-p-ethyl at 1.00 kg a.i. ha-1, tralkoxydim at 0.5 kg a.i. ha-1  and chlorsulfuron at 0.074 kg a.i. ha-1. Considering total grain and straw yields (4900 kg ha-1); (6600 kg ha-1), post-emergence clodinafop propargyl at 0.045 kg a.i. ha-1causes an excellent increase in wheat yield (51.02%) over control. The highest spikebearing tillers (380.67), number of grains spike-1 (47.28) and 1000-grain weight (49.38 g) were maximum in clodinafop propargyl at 0.045 kg a.i. ha-1 as post-emergence treated plots. Based on the total wheat yield (grain and straw) obtained, isoproturon at 1.5 kg a.i. ha-1, metribuzin + fenoxaprop-p-ethyl at 1.00 + 1.00 kg a.i. ha-1, chlorsulfuron at 0.074 kg a.i. ha-1 seemed someway phytotoxic to crop plants and depressed wheat yield. Hence, maximum net income of Rs. 136997 ha-1 and maximum MRR (%) of 231316.6 was recorded with the use of clodinafop propargyl at 0.045 kg a.i. ha-1 as post applied followed by carfentrazone ethyl (0.015 kg a.i ha-1) with the MRR (%) of 89700.   Key words: Triticum aestivum L., Avena fatua, Coronopus didymus, Melilotus indica, clodinafop propargyl, weed control, herbicides.

Postemergence Weed Control in Acetolactate Synthase–Resistant Grain Sorghum

Postemergence herbicides to control grass weeds in grain sorghum are limited. Acetolactate synthase (ALS) –inhibiting herbicides are very effective at controlling many grass species in many crops; unfortunately, use of ALS-inhibiting herbicides is not an option in conventional grain sorghum because of its susceptibility to these herbicides. With the development of ALS-resistant grain sorghum, several POST ALS-inhibiting herbicides can be used to control weeds in grain sorghum. Field experiments were conducted in 2007 and 2008 to evaluate the efficacy of tank mixtures of nicosulfuron + rimsulfuron applied alone or in combination with bromoxynil, carfentrazone–ethyl, halosulfuron + dicamba, prosulfuron, 2,4-D, or metsulfuron methyl + 2,4-D. In addition, these treatments were applied with and without atrazine. Nicosulfuron + rimsulfuron controlled barnyardgrass, green foxtail, and giant foxtail 99, 86, and 91% 6 wk after treatment (WAT), respectively. A decrease in annual grass control was observed when nicosulfuron + rimsulfuron was tank mixed with some broadleaf herbicides, although the differences were not always significant. In addition, nicosulfuron + rimsulfuron controlled velvetleaf and ivyleaf moringglory 64 and 78% 6 WAT, respectively. Control of velvetleaf was improved when nicosulfuron + rimsulfuron was tank mixed with all broadleaf herbicides included in this study with the exception of atrazine, bromoxynil, and prosulfuron + atrazine. Control of ivyleaf morningglory was improved when nicosulfuron + rimsulfuron was tank mixed with all of the herbicides included in this study with the exception of metsulfuron methyl + 2,4-D. Weed populations and biomass were lower when nicosulfuron + rimsulfuron were applied with various broadleaf herbicides than when it was applied alone. Grain sorghum yield was greater in all herbicide treatments than in the weedy check, with the highest grain yield from nicosulfuron + rimsulfuron + prosulfuron. This research showed that postemergence application of nicosulfuron + rimsulfuron effectively controls grass weeds, including barnyardgrass, green foxtail, and giant foxtail. The research also showed that velvetleaf and ivyleaf morningglory control was more effective when nicosulfuron + rimsulfuron were applied with other broadleaf herbicides.

Influence of Shade and Irrigation on the Response of Corn (Zea mays), Soybean (Glycine max), and Wheat (Triticum aestivum) to Carfentrazone–Ethyl1

Crop response to carfentrazone–ethyl can be affected by environmental conditions. Field research was initiated to determine the effect of irrigation and light intensity prior to herbicide treatment on crop response to carfentrazone–ethyl. Wheat, corn, and soybean response was evaluated in 1996 and 1997, 2 yr that differed significantly in rainfall. It was difficult to distinguish differences in visible crop injury between irrigated and nonirrigated crops within the same year; however, injury was much higher in 1996 than in 1997. In 1996, the study area received timely rainfall prior to treatment of each crop, but in 1997, no precipitation was recorded during the treatment period. Overall, irrigated plants appear to be slightly more sensitive than nonirrigated plants. In contrast, crop injury was significantly higher in response to low light intensity prior to herbicide treatment. Soybean plants covered with 80% shade cloth for 5 d prior to carfentrazone–ethyl application were injured 24 to 41% more than n...

Degradation of [(14)C]carfentrazone-ethyl under aerobic aquatic conditions.

Carfentrazone-ethyl (CF-E) is an aryl triazolinone reduced-risk herbicide for use on corn, wheat, and soybean. As part of the assessment of its metabolic fate, the aerobic aquatic metabolism of [(14)C]CF-E at a concentration of 0.22 microg/g was investigated. Two separate aquatic sediments (silty clay loam and clay loam soils, flooded with water) were used in the study. At each of eight samplings throughout the 30-day study, the distribution of radioactivity between surface water, sediment, and volatile fractions was assessed. At zero time, the majority of the applied radioactivity was contained in the water layer (83-90%), declining to 70-80% after 30 days. This was coupled with an increase in the percent radioactivity in the soil layer from 4-6% at day 0 to 13-19% after 30 days. Nonextractable soil residues and volatile degradation products were formed in negligible amounts. Analysis of the incubation extracts from either aquatic sediment indicated a rapid conversion (<2 days) of the parent CF-E ester to carfentrazone-chloropropionic acid. Over time, increasing amounts of a cascade of acidic degradation products comprising >90% of the applied radioactivity were formed. Identification of these degradation products was initially achieved through chromatographic comparison with reference synthetic standards and subsequently confirmed using LC-MS analysis. A degradation pathway for CF-E under aerobic aquatic conditions is proposed.

Effect of herbicides and their tank mixture on weed dynamics and yield of zero- tilled wheat (Triticum aestivum) under rice (Oryza sativa)wheat cropping system of eastern Uttar Pradesh

An on-farm trial was conducted at Gorakhpur, Uttar Pradesh during the winter seasons of 201011 and 2011 12, to assess the efficacy of sulfosulfuron, Clodinofop, metribuzin, mesosulfuran + idosulfuron and tank mixture of sulfosulfuron with 2,4-D, metsulfuron and carfentrazone ethyle as well as clodinofop with metsulfuron in zero-tilled wheat [Triticum aestivum (L.) emend. Fiori &amp; Paol.] crop. All herbicidal treatments reduced the weed density and weed dry weight significantly compared to weedy check. In general, tank-mix application of herbicides proved bet- ter than their alone application in suppressing weed number and dry weight. Highest grain yield (5.17 t/ha) and straw yield (5.79 t/ha) were recorded in weed-free plot, which was at par with clodinofop + metsulfuron (60+2.5 g a.i./ha). Uncontrolled growth of weeds caused 45.3% reduction in the crop yield compared to weed-free treatment. Tank-mix application of clodinofop with metsulfuron and sulfosulfuron with metsulfuron, carfentrazone ethyl and 2, 4-D proved better, showing an increase in grain yield of 14.7% than their alone application. Tank mix application of clodinofop with metsulfuron remaining at par with sulfosulfuron + carfentrazone ethyl significantly reduced the weed density and weed dry weight compared to rest of the herbicides tested. Tank-mix application of clodinofop + metsulfuron remaining at par with sulfosulfuron mix with either carfentrazone ethyl, metsulfuron or 2, 4-D was most effective in enhancing yield attributes, grain and straw yield. Highest net returns ( 33,660/ha) and benefit: cost ratio (2.91) were also obtained using clodinofop + metsulfuron. Application of metribuzin in spite of better weed-control efficiency recorded the lowest grain yield amongst the herbicides tested which was at par with mesosulfuron + idosulfuron.