scholarly journals Antagonismo das associações de clodinafop-propargyl com metsulfuron-methyl e 2,4-D no controle de azevém (Lolium multiflorum)

2007 ◽  
Vol 25 (4) ◽  
pp. 839-847 ◽  
Author(s):  
M.M. Trezzi ◽  
D. Mattei ◽  
R.A. Vidal ◽  
N.D. Kruse ◽  
M.S. Gustman ◽  
...  
Keyword(s):  
Lolium Multiflorum ◽  
Metsulfuron Methyl ◽  
Clodinafop Propargyl

Em geral, a eficiência de herbicidas inibidores da ACCase é reduzida quando da aplicação em conjunto com herbicidas latifolicidas. Dois experimentos - em casa de vegetação e campo - objetivaram determinar a existência de antagonismo nas associações de clodinafop-propargyl a metsulfuron-methyl ou 2,4-D, para controle de azevém anual. Em casa de vegetação, o delineamento foi o completamente casualizado, com 21 tratamentos compostos pela aplicação de clodinafop (0, 3, 6, 12, 24, 48 e 96 g ha-1) isolado ou em mistura com metsulfuron-methyl (2 e 4 g ha-1) ou 2,4-D (470 g ha-1). Em campo, o delineamento foi de blocos casualizados, com 12 tratamentos, arranjados em fatorial 6 x 2, composto pelos níveis de clodinafop-propargyl (0, 3, 6, 12, 24, 48 e 96 g ha¹) isolado ou em mistura com metsulfuron-methyl (2 g ha-1). A avaliação visual de controle, em casa de vegetação, revelou I50 das misturas de clodinafop-propargyl + metsulfuron-methyl (2 e 4 g ha-1) ou clodinafop-propargyl + 2,4-D (470 g ha-1), respectivamente, 33, 84 e 151% superiores ao de clodinafop-propargyl isolado. Já para matéria verde de azevém, o I50 das misturas supracitadas foi, respectivamente, 119, 244 e 72% superior ao de clodinafop-propargyl isolado. Em campo, ocorreu redução da matéria verde de azevém com a elevação dos níveis de clodinafop-propargyl isolado, mas não houve variação da matéria verde com a elevação dos níveis de clodinafop-propargyl, em associação a metsulfuron-methyl. Os resultados evidenciam a existência de antagonismo entre clodinafop-propargyl e os herbicidas metsulfuron-methyl e 2,4-D. São feitas considerações sobre as possíveis vantagens da aplicação dos herbicidas em mais de uma operação de controle, em comparação à associação entre graminicidas e latifolicidas.

scholarly journals Efeito da época de aplicação de herbicidas sulfonilureias no controle de azevém anual na cultura do trigo

2015 ◽  
Vol 14 (2) ◽  
pp. 117
Author(s):  
Jony Cley dos Santos ◽  
Marcelo Cruz Mendes ◽  
Jerônimo Gadens do Rosário ◽  
Osnil Alves Camargo Junior ◽  
Cleber Daniel de Goes Maciel
Keyword(s):  
Lolium Multiflorum ◽  
Metsulfuron Methyl

A adoção de práticas de manejo de plantas daninhas constitui em uma das principais ferramentas que podem contribuir para o aumento da produtividade de grãos nas lavouras de trigo. O presente estudo teve como objetivo avaliar a eficiência dos herbicidas do grupo químico das sulfonilureias, isolados e em associação, em diferentes épocas da aplicação sobre a produtividade de cultivares comerciais de trigo, e no controle do azevém anual (Lolium multiflorum L.). O delineamento foi o de blocos casualisados, com 5 repetições. Os tratamentos foram arranjados em esquema fatorial 4 x 2 x 2, compostos pela aplicação de metsulfuron-methyl e iodosulfuron- methyl, isolados e em associação e testemunha, utilizando duas cultivares comerciais de trigo (Quartzo e BRS Tangará) em duas épocas de aplicação 21 e 30 dias após a aplicação. Foram avaliados a fitointoxicação das cultivares, o nível de controle do azevém anual e o rendimento das características agronômicas da cultura do trigo. Para o controle do azevém anual constatou-se que há diferença quando utilizado os herbicidas sulfoniluréias, sendo o iodosulfuron-methyl em uso isolado e em associação com o metsulfuron-methyl eficiente no controle. A aplicação de iodosulfuron-methyl (5,0 g i.a. ha-1) e metsulfuron-methyl (2,4 g i.a. ha-1) + iodosulfuron-methyl (5,0 g i.a. ha-1) aos 30 dias após a semeadura resultou na maior produtividade de grãos de trigo.

Effect of herbicide combinations on weed dynamics, nutrient removal and yield of Wheat (Triticum aestivum L.) under north western plain zone

2017 ◽  
Vol 2 (01) ◽  
pp. 10-15
Author(s):  
Adesh Singh
Keyword(s):  
Triticum Aestivum ◽  
Weed Control ◽  
Triticum Aestivum L ◽  
Research Centre ◽  
Metsulfuron Methyl ◽  
Npk Uptake ◽  
Weed Dynamics ◽  
Crop Research ◽  
North Western ◽  
Clodinafop Propargyl

A field experiment was conducted to study the effect of different weed control practices on weed dyanamics, nutrient uptake and yield of wheat (Triticum aestivum L.) in rabi seasons of 2010-11 and 2011-12 at Crop Research Centre of SVPUAandT, Meerut. The treatments comprising pre-emergence application of pendimethalin @ 1000 g/ha, post emergence application of isoproturon @1200 g/ha, isoproturon+2,4-D @ 1200+600 g/ha, isoproturon+metsulfuron methyl @ 1200+4 g/ha, fenoxaprop -p-ethyl @ 80 g/ha, fenoxa prop -p-ethyl +2,4-D @ 80+600 g/ha, fenoxa prop -p-ethyl +metsulfuron methyl @ 80+4 g/ha, clodinafop propargyl @ 60 g/ha, clodinafop propargyl+2,4-D @ 60+600 g/ha and clodinafop propargyl+metsulfuron methyl @ 60+4 g/ha were tested with weed free and weedy check. Among the herbicides, application of clodinafop propargyl+ metsulfuron (60+4 g/ha) though statistically on par with clodinafop propargyl+ 2,4-D (60+600 g/ha) reduced the weed population significantly than weedy check (97.2%), clodinafop propargyl alone (88.0%), fenoxaprop -p-ethyl alone (83.0%), isoproturon alone (80.0%), isoproturon+metsulfuron (72.2%), pendimethalin (71.4%), isoproturon+2,4-D (53.8%), fenoxa prop -p-ethyl +2,4-D (53.8%) and fenoxa prop -p-ethyl + metsulfuron (40.0%) at 60 days after sowing stage. Among the herbicides, application of Clodinafop propargyl+ metsulfuron methyl (60+4 g/ha) as post emergence resulted into highest grain yield of wheat (49.28q/ha) which was on par with weed free and clodinafop propargyl+2,4-D @ 60+600 g/ha but statistically significant than rest of the treatments. Highest NPK uptake by grain and straw of wheat was recorded in weed free conditions compared to the herbicidal treatments, except lodinafop propargyl+metsulfuron methyl and clodinafop propargyl+ 2, 4-D. Highest removal of NPK (63.6 kg/ha) by weeds was recorded in weedy check whereas, the minimum NPK uptake (28.4 kg/ha) was noticed with the application of clodinafop propargyl+metsulfuron methyl due to efficient control of weeds (weed control efficiency 84.7%), which resulted in lowest weed dry matter in this treatments.

scholarly journals Seletividade e eficácia de herbicidas aplicados à cultura do trigo

2021 ◽  
Vol 20 (3) ◽  
pp. 199-212
Author(s):  
Leandro Galon ◽  
Cleiton Ulkovski ◽  
Emanuel Rodrigo de Oliveira Rossetto ◽  
Daniel Cristian Cavaletti ◽  
Sabrina Natalia Weirich ◽  
...  
Keyword(s):  
Lolium Multiflorum ◽  
Raphanus Raphanistrum ◽  
Metsulfuron Methyl

As plantas daninhas ocasionam efeitos negativos na produtividade e na qualidade dos grãos da cultura do trigo quando não controladas de modo eficiente. Assim sendo, objetivou-se com os trabalhos avaliar a seletividade e a eficácia de herbicidas aplicados para o manejo de plantas daninhas infestante da cultivar de trigo TBIO Sinuelo. Foram instalados dois experimentos, um para avaliar a seletividade e outro a eficácia de herbicidas aplicados em trigo, em blocos casualizados, com quatro repetições. Os tratamentos testados foram: iodosulfuron, pyroxsulam, metsulfuron-methyl, 2,4-D, clodinafope-propargil, [bentazon + imazamox], saflufenacil, bentazon, carfentrazone-ethyl, imazamox, pendimethalin, [sulfentrazone + diuron], mais duas testemunhas uma capinada e outra infestada. Os herbicidas que ocasionaram as maiores injúrias ao trigo foram o imazamox e a mistura comercial de [bentazon + imazamox] com fitotoxicidade próxima a 50%. A aplicação da mistura comercial de [sulfentrazone + diuron] demonstrou a maior produtividade de grãos do trigo. O uso de clodinafope-propargil e pyroxsulam apresentaram os melhores controles de Lolium multiflorum, com 100 e 98,25%, aos 21 dias após a aplicação dos tratamentos, respectivamente. Ocorreu controle acima de 90% de Raphanus raphanistrum com uso de iodosulfuron, pyroxsulam, metsulfuron-methyl, 2,4-D, [bentazon + imazamox], saflufenacil, bentazon e carfentrazone. O clodinafope-propargil demonstra o maior controle para o azevém e o iodosulfuron-ethyl, pyroxsulam, metsulfurom-metílico, 2,4-D, saflufenacil e carfentrazone para o nabo. O pyroxsulam foi o tratamento que demonstrou, nos dois experimentos, os melhores resultados para os componentes da produção, especialmente para a produtividade da cultura.

Inhibitory effects of Italian ryegrass (Lolium multiflorum Lam.) seedlings of rice (Oryza sativa L.)

2018 ◽  
Vol 44 (2) ◽  
pp. 219-232 ◽  
Author(s):  
S.J Jang ◽  
K.R. Kim ◽  
Y.B. Yun ◽  
S.S. Kim ◽  
Y.I Kuk
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Lolium Multiflorum ◽  
Italian Ryegrass ◽  
Inhibitory Effects

IMPACT OF WHEAT ESTABLISHMENT METHODS AND WEED MANAGEMENT PRACTICES ON WEED FLORA, YIELD AND NUTRIENT UPTAKE OF WHEAT IN RICE-WHEAT CROPPING SYSTEM

2019 ◽  
Vol 6 (02) ◽  
Author(s):  
MOHAN SINGH ◽  
OMBIR SINGH ◽  
ROHITASAV SINGH
Keyword(s):  
Nutrient Uptake ◽  
Weed Management ◽  
Conventional Tillage ◽  
Research Centre ◽  
Zero Tillage ◽  
Phalaris Minor ◽  
Weed Population ◽  
Metsulfuron Methyl ◽  
Transplanted Rice ◽  
Weed Flora

A field experiment was conducted at the Crop Research Centre of Govind Ballabh Pant University of Agriculture and Technology Pantnagar, Udham Singh Nagar during continuous two years to study the weed flora, yield and nutrient uptake of wheat (Triticum aestivum L.) under different wheat establishment methods in main plots and seven weed management in sub plots. Phalaris minor was the most dominant weed at 60 DAS contributed 55.0 per cent of total weed population. Melilotusindica was the major non grassy weeds in wheat which contributed 11 per cent to total weed population during respective years. Sowing of wheat with zero tillage significantly reduced the Phalaris minor density as compared to conventionally tilled wheat after transplanted rice, 60 per cent Phalaris minor emerged from 0-3 cm in reduced and conventional tillage where as in zero tillage after transplanted rice there was 55 per cent emergence from 0-3 cm layer.The highest grain yield was obtained in two hand weedings done at 30 and 60 DAS and was at par with Isoproturon 1.0 kg ha-1 + Metsulfuron methyl 4 g ha-1 at 30 DAS and Clodinafop – Propargyl 60 g ha-1 at 30 DAS fb. Metsulfuron methyl 4 g ha-1 at 37 DAS. Zero tillage resulted in significantly higher uptake of NPK by wheat plants as compared to conventional tillage, whereas reduced tillage recorded minimum NPK, which was significantly lower over the other treatments of wheat establishment methods.

scholarly journals Growth and Phenology of Vulpia Myuros in Comparison with Apera Spica-Venti, Alopecurus Myosuroides and Lolium Multiflorum in Monoculture and in Winter Wheat

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1495
Author(s):  
Muhammad Javaid Akhter ◽  
Bo Melander ◽  
Solvejg Kopp Mathiassen ◽  
Rodrigo Labouriau ◽  
Svend Vendelbo Nielsen ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Weed Management ◽  
Lolium Multiflorum ◽  
Management Strategies ◽  
Integrated Weed Management ◽  
Growth Stages ◽  
Neighborhood Design ◽  
Alopecurus Myosuroides ◽  
Winter Cereals ◽  
Arable Weed

Vulpia myuros has become an increasing weed problem in winter cereals in Northern Europe. However, the information about V. myuros and its behavior as an arable weed is limited. Field and greenhouse experiments were conducted in 2017/18 and 2018/19, at the Department of Agroecology in Flakkebjerg, Denmark to investigate the emergence, phenological development and growth characteristics of V. myuros in monoculture and in mixture with winter wheat, in comparison to Apera spica-venti, Alopecurus myosuroides and Lolium multiflorum. V. myuros emerged earlier than A. myosuroides and A. spica-venti but later than L. multiflorum. Significant differences in phenological development were recorded among the species. Overall phenology of V. myuros was more similar to that of L. multiflorum than to A. myosuroides and A. spica-venti. V. myuros started seed shedding earlier than A. spica-venti and L. multiflorum but later than A. myosuroides. V. myuros was more sensitive to winter wheat competition in terms of biomass production and fecundity than the other species. Using a target-neighborhood design, responses of V. myuros and A. spica-venti to the increasing density of winter wheat were quantified. At early growth stages “BBCH 26–29”, V. myuros was suppressed less than A. spica-venti by winter wheat, while opposite responses were seen at later growth stages “BBCH 39–47” and “BBCH 81–90”. No significant differences in fecundity characteristics were observed between the two species in response to increasing winter wheat density. The information on the behavior of V. myuros gathered by the current study can support the development of effective integrated weed management strategies for V. myuros.

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