scholarly journals Control de malezas en caña de azúcar con clomazone y ametrina.

2006 ◽  
Vol 10 (2) ◽  
pp. 23 ◽  
Author(s):  
Valentín Esqueda
Keyword(s):  
Weed Control ◽  
Cyperus Rotundus ◽  
Phyllanthus Niruri ◽  
Rottboellia Cochinchinensis

Two experiments were carried out in order to evaluate the effect of the herbicide clomazone applied in preemergence and the mixture clomazone+ametryn in postemergence on weed control and toxicity to sugarcane. Clomazone from 0.96 to 1.2 kg/ha controlled more than 90% of Echinochloa colona, Panicum fasciculatum and Lagascea mollis, but it was necessary to increase the dose to 1.44 kg/ha to obtain a 90% control of Rottboellia cochinchinensis and between 80 and 90% of Phyllanthus niruri and it had no effect on Cyperus rotundus. The postemergent application of clomazone + ametryn from 800 + 1200 g/ha, showed weed control similar or superior to those of the mixtures of 2,4-D+ ametryn and diuron+2,4-D, which are commonly utilized in the region. A temporal whitening of the sugarcane foliage occurred when clomazone was applied in postemergence, but this symptom disappeared 30 and 60 days after the application.

Bio-Efficacy of different tank mix herbicides for weed control in soybean [Glycine max (L.) Merrill]

2018 ◽  
Author(s):  
Jai Prakash Bhimwal ◽  
Arvind Verma ◽  
Virendra Nepalia ◽  
Versha Gupta
Keyword(s):  
Weed Control ◽  
Cynodon Dactylon ◽  
Cyperus Rotundus ◽  
Control Treatment ◽  
Yield Attributes ◽  
Commelina Benghalensis ◽  
Trianthema Portulacastrum ◽  
Glycine Max L ◽  
Herbicide Mixtures ◽  
Quizalofop Ethyl

A field experiment was conducted at the Rajasthan College of Agriculture, MPUAT, Udaipur during Kharif season 2015 and 2016 to adjudge the efficacy of different herbicide and herbicide mixtures against weeds in soybean. Monocot weeds were predominant (55.15%) in the experimental field compared with dicot weeds (44.85%). However, Echinochloa colona (41.56%) and Trianthema portulacastrum (33.16%) were predominant in soybean but, other weeds (Cyperus rotundus, Cynodon dactylon, Commelina benghalensis, Digera arvensis, Amaranthus viridis, Physalis minima, Corchorus spp.) were also present at 60 DAS. Among different weed control treatments, post-emergence and tank mix combination of propaquizafop + imazethapyr (75+75 g ha-1) and imazethapyr + quizalofop-ethyl (75+60 g ha-1) at 21 DAS were most effective in respect of reducing weed density, weed biomass, nutrient removal by weed and promote yield attributes and yield and quality of soybean as compared to rest of weed control treatment.

scholarly journals Pengaruh Herbisida Metil Metsulfuron dan Kombinasinya pada Pengendalian Gulma Tanaman Tebu (Saccharum officinarum L.)

2021 ◽  
Vol 11 (2) ◽  
pp. 45
Author(s):  
Muhammad Aziz Setiawan ◽  
Sismita Sari ◽  
Mirodi Syofian
Keyword(s):  
Acetic Acid ◽  
Weed Control ◽  
Block Design ◽  
Residual Effect ◽  
Dry Weight ◽  
Saccharum Officinarum ◽  
Cyperus Rotundus ◽  
Cultivated Plants ◽  
Randomized Block Design ◽  
Community Coefficient

Weed control must use the right dose of herbicide so as not to leave a residual effect on cultivated plants and soil. This study ains to obtain the most appropriate dose of herbicide. Herbicide used in this study were methyl methulfuron and acetic acid combined. This study used a randomized block design (RCBD) witch 2 factors, factor A was asetic acid and factor B was methyl methulfuron and there were 12 treatment combinations with 3 replications. This research was conducted in the practicum of the Departement of Plantation Plant Cultivation, Lampung State Polytechnic. The total research plot was 36 experimentals units. The dosage levels levels of methyl methulfuron tested in this study were: 0%, 55%, 75%, and 105%. While the dose of acetic acid is: 0%, 50%, and 70%. Observations made in this study were weed vegetation analysis, weed cover percent, weed dry weight, Summed Dominance Ratio (SDR), and Community Coefficient Value (C). SDR values indicate that Panicum dicotomyflorum weed, Ricardia brasiliensis, Euphorbia heterophyla, and Cyperus rotundus are the dominant weeds. The results of this study indicate that there is no effect on the dose of methyl methulfuron herbicide, acetic acid, and interactions on methyl methulfuron herbicide and acetic acid on weed control in sugarcane fields (Saccharum officinarum L.).

scholarly journals Control de malezas en arroz de temporal con clomazone, propanil y 2,4-D.

2006 ◽  
Vol 10 (2) ◽  
pp. 43 ◽  
Author(s):  
Valentín A. Esqueda
Keyword(s):  
Weed Control ◽  
The State ◽  
Cyperus Rotundus ◽  
Weed Species ◽  
Initial Control ◽  
Rice Yields ◽  
Upland Conditions ◽  
Experimental Plots

Between 1996 and 1997, three experiments were carried out in order to evaluate the effect of the herbicide clomazone, alone and mixed with propanil and 2,4-D on weed control and toxicity to rice cv. Milagro Filipino, growing under upland conditions. All the experiments were established in Los Naranjos, in the Municipality of Tres Valles, in the state of Veracruz. The dominant weed species in the experimental plots were Cyperus iria, Echinochloa colona, Cyperus rotundus, Scleria setuloso-ciliata and Malachra fasciata. Clomazone applied preemergent, efficiently controlled E. colona at 0.72 and 0.96 kg a. i./ha, but its effect was partial and temporary on S. setuloso-ciliata and it had no effect on C. iria and C. rotundus. The mixture of clomazone + propanil + 2,4-D efficiently controlled E. colona and C. iria from 0.60 + 1.44 + 0.24 kg a. i./ha and had a good initial control of C. rotundus, but its effect disappeared 45 to 60 days after the application. Rice yields obtained from clomazone treatments, alone or mixed with propanil and 2,4-D were statistically similar to those of the regional controls.

Potential of trans-p-coumaric acid released from Rottboellia cochinchinensis for weed control in vegetable fields

2019 ◽  
Vol 46 (2) ◽  
pp. 41-50
Author(s):  
A. Bundit ◽  
K. Yamada ◽  
H. Shigemori ◽  
W. Laosripaiboon ◽  
A. Datta ◽  
...  
Keyword(s):  
Weed Control ◽  
Coumaric Acid ◽  
Rottboellia Cochinchinensis

scholarly journals Sifat campuran herbisida berbahan atrazin 500g/L+ mesutrion 50 g/L terhadap beberapa jenis gulma

Kultivasi ◽  
2018 ◽  
Vol 17 (2) ◽  
Author(s):  
Dedi Widayat ◽  
Uum Umiyati ◽  
Yayan Sumekar ◽  
Dani Riswandi
Keyword(s):  
Weed Control ◽  
Linear Regression Analysis ◽  
Cyperus Rotundus ◽  
Ageratum Conyzoides ◽  
Digitaria Sanguinalis ◽  
A Value ◽  
Herbicide Mixture ◽  
Herbicide Mixtures ◽  
Four Levels ◽  
Cleome Rutidosperma

AbstrakGulma bila tidak dikendalikan dapat menurunkah hasil tanaman 20% sd 80%, untuk itu pengendalian gulma mutlak diperlukan. Pengandalian gulma dengan menggunakan herbisida tunggal bila dilakukan terus menerus akan menimbulkan gulma resisten, untuk mengnangulanginya perlu dilakukan pencampuran herbisida. Campuran herbisida dengan dua atau lebih jenis bahan aktif dapat bersifat sinergis, aditif, atau antagonis. Tujuan penelitian adalah untuk mengetahui sifat campuran herbisida Atrazin 500g/L + Mesutrion 50 g/L terhadap beberapa jenis gulma. Penelitian dilakukan pada bulan Maret-Juni 2017, di Laboratorium Kultur Terkendali Universitas Padjadjaran, Jatinangor. Perlakuan terdiri dari tiga jenis herbisida dengan empat tingkat dosis, yaitu herbisida tunggal Atrazine (1080, 540, 270, 135, 0  g /ha), Mesutrion (196, 98, 49, 24,5, 0 g/ha) dan campuran herbisida dari Atrazin 500g/L+ Mesutrion 50 g/L (880,440, 220,110,0 g/ha) dengan empat ulangan. Gulma target adalah Cyperus rotundus, Axonopus compressus, Digitaria sanguinalis, Ageratum conyzoides, Alternanthera piloxeroide,, Cleome rutidosperma.  Data dianalisis dengan analisis regresi linier dan metode MSM untuk menentukan perlakuan LD50 dan harapan LD50. Hasil penelitian menunjukkan Herbisida Campuran Atrazin 500g/L + Mesutrion 50 g/L memiliki nilai LD50 Harapan sebesar 0.097 g ai/ha dan nilai LD50 perlakuan sebesar 0.0283 g ai/ha dengan kotoksisitas sebesar 3.416 ( > 1) menandakan sifat campuran yang sinergis pada keenam gulma yang diuji yaitu A. conyzoides, A. piloxeroide,, C. rutidosperma, C. rotundus, A. compressus, D. sanguinalis.Keywords: Atrazine, Mesutrion , Herbisida campuran, gulma.AbstractWeed can decrease the yield of plants 20% to 80% if they cannot be controlled, so weed control is absolutely necessary. Weed control by using a single herbicide continuously will cause weeds resistant, so it is necessary to mix herbicides. Combinations of herbicide with two or more types of active ingredient can be synergistic, additive, or antagonistic. The purpose of the study was to determine the characteristic of the herbicide mixture of Atrazine 500 g / l + Mesutrion 50 g / l for several types of weeds. The study was conducted in March – June 2017, at the Controlled Culture Laboratory, Padjadjaran University, Jatinangor. The treatment consisted of three types of herbicides with four levels of dosage, namely Atrazine herbicide (1080, 540, 270, 135, 0 g/ha), Mesutrion herbicide (196, 98, 49, 24.5, 0 g/ha) and herbicides mixtures Atrazine 500 g/L + Mesutrion 50 g/L (880,440, 220,110.0 g/ha) with four replications. Target weeds were Cyperus rotundus, Axonopus compressus, Digitaria sanguinalis, Ageratum conyzoides, Alternanthera piloxeroide, Cleome rutidosperma. Data were analyzed by linear regression analysis and MSM method to determine LD50 treatment and LD50 expectations. The results showed that Atrazine 500 g/L + Mesutrion 50 g/L Herbicides Mixed had a value of Hopeful LD50 of 0.097 g ai/ha and LD50 treatment value of 0.0283 g ai/ha with a co-toxicity of 3.416 (> 1) that indicating a synergistic mixture in the sixth weeds tested are A. conyzoides, A. piloxeroide, C. rutidosperma, C. rotundus, A. compressus, D. sanguinalis.Keywords: Atrazine, Mesutrion , herbicide mixtures, weeds

scholarly journals Clomazone and oxyfluorfen for weed control in transplanted cabbage (Brassica oleracea L.)

1969 ◽  
Vol 81 (3-4) ◽  
pp. 203-210
Author(s):  
Nelson Semidey
Keyword(s):  
Puerto Rico ◽  
Brassica Oleracea ◽  
Weed Control ◽  
Field Experiments ◽  
Cyperus Rotundus ◽  
Purple Nutsedge ◽  
Weed Density ◽  
Brassica Oleracea L

Two field experiments were conducted in 1992-93 and 1994 at Juana Díaz, Puerto Rico, to evaluate clomazone, oxyfluorfen, and prometryn as preplant herbicides in cabbage. After three weeks, clomazone (1.12 and 2.24 kg ai/ha), oxyfluorfen (0.28 and 0.56 kg ai/ha), and prometryn (2.0 and 4.0 kg ai/ha) reduced weed density by more than 67% and 90% in 1992-93 and 1994, respectively. At the lower rate, clomazone and oxyfluorfen caused 15% to 25% injury to cabbage when evaluated after three weeks, and 2% to 10% after six weeks. Prometryn caused more than 65% injury and reduced cabbage yield by more than 84%. Cabbage treated with clomazone at both rates and oxyfluorfen at 0.56 kg ai/ha produced yields similar to that of the handweeded check (39,980 kg/ha) in 1992-93. Interference to cabbage was caused mostly by purple nutsedge (Cyperus rotundus L.) in 1994.

scholarly journals Efficacy of Candidate Herbicides for Post- Emergence Weed Control in Kenaf (Hibiscus cannabinus L.)

2019 ◽  
pp. 1-7
Author(s):  
O. A. Aluko
Keyword(s):  
Weed Control ◽  
Agronomic Traits ◽  
Agricultural Research ◽  
Dry Weight ◽  
Cyperus Rotundus ◽  
Hibiscus Cannabinus ◽  
Cost Ratio ◽  
Land Preparation ◽  
Weed Flora ◽  
Fibre Yield

Post emergence application of herbicides reduced weed growth, enhanced kenaf agronomic traits and fibre yield. A study was conducted to determine the efficacy of some herbicide formulations for post emergence weed control in kenaf at Ibadan (0.7.38N; 003.84E- Derived savanna agro-ecology) station of the Institute of Agricultural Research and Training (IAR&T), Obafemi Awolowo University, Ibadan in 2016 and 2017 rainy seasons.  Herbicides applied were Quazilofop-P-ethyl (100, 150, 200 ml/ha), Oxyfluorfen (0.96, 1.20 and 1.44 kg ai/ha) and Fluazifop-p-butyl 150, 225 and 300 g ai/ha) at three rates each, while weed-free and weedy were the control treatments. Weed flora composition before land preparation was dominated by annual weeds; broadleaves (70%), grass (20%) and spiderwort (10%). At 10 weeks after sowing (WAS), weed flora composition comprised of 64% broadleaf, 14% grass, 8% spiderwort and 14% sedge. Weed flora dynamics after treatments application might have been influenced by herbicide formulations applied. Oldenlandia corymbusa, Cyperus escunlentus, Desmodium scorpurus and Cyperus rotundus were identified as prevalent weeds across the treatments applied while Mimosa pudica, was a minor weed.  Herbicides improved kenaf agronomic traits (plant height, stem-butt girth and number of leaves/plant) due to minimal weed competition; reduced weed flora composition and weed weight relative to weed infested kenaf plants in weedy control. Oxyfluorfen (0.96, 1.20 and 1.44 kg ai/ha); fluazilof-p-butyl (225 and 300 g ai/ha); Quazilofop-P-ethyl (100 and 200 ml/ha) reduced weed dry weight by 60-70%. Weed-free plots had the highest weed control efficiency (WCE %). Evidently, acceptable WCE of ≥ 80% and comparable gross fibre yield with the maximum in weed-free recorded in Oxyfluorfen (1.20 and 1.44 kg ai/ha) and Fluazilofop-p-butyl (300 g ai/ha) showed their efficacies. However, low WCE 50 -65% in Quazilofop-p-ethyl (100, 150, 200 ml/ha) might reflected a review of the doses applied for better efficacy.  Kenaf gross fibre yield was reduced by 65% in the weedy check plot, due to superior weed infestation and utmost weed dry weight accumulation. Notwithstanding, the benefit-cost ratio and environmental impact assessment of the study must be carried out for economically viable kenaf production and environmental friendliness.

scholarly journals Efficiency of some herbicides and manual weeding for weed control in irrigated Bt cotton

2018 ◽  
Author(s):  
R.K. Mathukia ◽  
B.K. Sagarka ◽  
P.R. Mathukia ◽  
N.V. Savaliya
Keyword(s):  
Weed Control ◽  
Cynodon Dactylon ◽  
Chenopodium Album ◽  
Dry Weight ◽  
Cyperus Rotundus ◽  
Growth And Yield ◽  
Cotton Field ◽  
Bt Cotton ◽  
Seed Cotton ◽  
Yield Attributes

To evaluate the efficacy of some pre and post-emergence herbicides for weed control in Bt cotton (var. Beejdhan 2), a field experiment was conducted during rainy seasons of 2014-15, 2015-16 and 2016-17 at Junagadh (Gujarat, India). The dominant weed flora in cotton field were Digera arvensis, Eluropus villosus, Cyperus rotundus, Cynodon dactylon, Echinochloa crusgalli, Chenopodium album, Convolvulus arvensis, Trianthema monogyna, Amaranthus spinosus, Commelina benghalensis and Asphodelus tenuifolius. The results revealed that treatments viz., hand weeding (HW) and interculturing (IC) at 30, 60 and 90 DAS, pendimethalin 0.9 kg ha-1 as pre-emergence fb HW and IC at 30 and 60 DAS, and pendimethalin 0.9 kg ha-1 as pre-emergence fb quizalofop 40 g ha-1 as post-emergence at 45 DAS were found superior to the unweeded check in enhancing growth and yield attributes viz., plant height, number of monopodial and sympodial branches plant-1, number of bolls plant-1, single boll weight and seed cotton weight plant-1 and ultimately increased seed cotton and stalk yields. These treatments also recorded lower dry weight of weeds and weed index along with higher weed control efficiency, net return and B:C ratio as compared to unweeded check.

scholarly journals WEED COMMUNITY INTERFERENCE AND PHYTOSOCIOLOGICAL STUDIES IN A SWEET SORGHUM CROP

2017 ◽  
Vol 35 (0) ◽  
Author(s):  
P.R.F. GIANCOTTI ◽  
M.S. MORO ◽  
M.P. NEPOMUCENO ◽  
P.F.R.B. MARTINS ◽  
A.A.M. BARROSO ◽  
...  
Keyword(s):  
Weed Control ◽  
Sweet Sorghum ◽  
Biomass Accumulation ◽  
Dry Mass ◽  
Summer Season ◽  
Cyperus Rotundus ◽  
Fall Season ◽  
Weed Population ◽  
Weed Interference ◽  
Indigofera Hirsuta

ABSTRACT This research was carried out to evaluate the interference periods and phytosociological indexes of the weed community on sweet sorghum, hybrid CVSW 80007, cultivated for two seasons in a year. The treatments were based on an increased duration of weed presence and weed absence after sowing (0, 4, 7, 14, 21, 28, 35, 42, 56 and 68 days after crop emergence for the summer season and 0, 4, 7, 14, 21, 28, 35, 42, 49, 56, 63 and 100 days for the fall season). The weed community was evaluated based on the number of weeds and the dry mass of each weed population in each period of weed control in the summer season and each period of no weed control and weed control in the autumn season. These data were used to determine the relative indexes of density, dominance and importance, and the weed community indexes of diversity and equitability. The main weeds comprising the community were Cyperus rotundus, Alternanthera tenella, Indigofera hirsuta, Amaranthus sp., Digitaria nuda, and Portulaca oleracea. The weed density was found to be the primary factor for the importance of weeds in the community, once their development and biomass accumulation were suppressed by the sweet sorghum competition. The sweet sorghum hybrid proved highly competitive and, in the agro-ecological conditions of the trials, weed interference did not reduce crop yield.

scholarly journals Chemical management of Cyperus rotundus L. and other weeds at sugarcane in PSS system

2021 ◽  
Vol 37 ◽  
pp. e37056
Author(s):  
Ana Ligia Giraldeli ◽  
André Felipe Moreira Silva ◽  
Luisa Carolina Baccin ◽  
Lucas da Silva Araújo ◽  
Gustavo Soares da Silva ◽  
...  
Keyword(s):  
Weed Control ◽  
Seed Bank ◽  
Block Design ◽  
Cyperus Rotundus ◽  
Control Treatment ◽  
Agronomic Performance ◽  
Control Variables ◽  
Purple Nutsedge ◽  
Chemical Management ◽  
Randomized Complete Block Design

Among the main weeds with difficult to control in the sugarcane fields can be cited purple nutsedge (Cyperus rotundus L.). This specie was observed in the seed bank in sugarcane fields harvested with or without burning. The objective of this study was to evaluate the efficacy of herbicides in pre-sprouted seedlings (PSS) of sugarcane in the control of C. rotundus and other weeds. The work was carried out in the field, in a randomized complete block design, and four replications. The treatments corresponded to the herbicides applied in pre-planting: sulfentrazone (800 g a.i. ha-1), diclosulam (193.17 g a.i. ha-1), imazapic (133 g a.i. ha-1) and imazapyr (500 g a.e. ha-1); post-planting: halosulfuron (112.5 g a.i. ha-1), ethoxysulfuron (135 g a.i. ha-1), MSMA (1,975 g a.i. ha-1) and 2,4-D (1,340 g a.e. ha-1); besides a control treatment weeding and another without weeding. The symptoms of injury on sugarcane plants, percentage of weed control, variables related to agronomic performance of sugarcane, and yield were evaluated. The herbicides diclosulam, imazapic, and imazapyr caused serious damage to the crop. The halosulfuron, ethoxysulfuron, MSMA, and 2,4-D did not cause symptoms of injury to sugarcane, however, the treatments had a reduced yield due to the low weed control. The sulfentrazone treatment obtained the second highest yield but with effective weed control (>70%) up to 45 days after planting. The best controls were obtained with pre-planting treatments; however, herbicide positioning studies should be performed in relation to PSS.

Sign in / Sign up

Export Citation Format

Share Document