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| MACIEL,C.D.G.; OLIVEIRA,C.N.M.; SILVA,A.A.P.; KARPINSKI,R.A.K.; HELVIG,E.O.; MATIAS,J.P.. |
| ABSTRACT Lawn with grass classified as Axonopus compressus is very common in Brazil Southern region, where it normally presents an adequate low temperature tolerance and a high diversity of weed infestation. This work has aimed to conduct a phytosociological survey of weeds in lawn consisting of Axonopus compressus from CEDETEG/UNICENTRO University campus located in the Brazilian municipality of Guarapuava, in the state of Paraná, in different periods of 2013. One hundred eighty 0.50 x 0.50 m samples were collected in four months, from which parameters frequency, density, abundance, relative frequency, relative density, relative abundance and importance value index were calculated. In general, 24, 7, 17 and 14 weed species were identified, distributed in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Axonopus compressus; Lawn; Identification. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400691 |
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| SOUZA,J.I.; SILVA,A.A.P.; CHAGAS,R.R.; OLIVEIRA NETO,A.M.; MACIEL,C.D.G.; RESENDE,J.T.V.; ONO,E.O.. |
| ABSTRACT The study was conducted with the objective of determining the critical periods of interference prevention (CPIP) and the best period for the management of weeds community in onion crop Crioula Mercosul genotype, transplanted in distinct plants densities. The experiment was carried out in field conditions in the Brazilian municipality of Guarapuava, Paraná State, during the 2012 and 2013 agricultural years, at Universidade Estadual do Centro-Oeste - UNICENTRO. Treatments were disposed in randomized complete blocks and experimental design, with five repetitions, consisting of weeds coexistence periods and weeds control at 14, 28, 56, 112 and 168 days after transplanting the seedlings (DATS), using 0.6, 0.8 and 1.0 million plants ha-1. Weeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Competition; Plant arrangement; Bulb yield. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200299 |
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| SILVA,A.A.P.; OLIVEIRA NETO,A.M.; NAIARA,G.; KARPINSKI,R.A.K.; MACIEL,C.D.G.. |
| ABSTRACT Several factors can influence wheat crop yield, they include the interference imposed by weeds is one of the most important. The objective of this study was to evaluate the critical periods of weed interference in early wheat in the midwest of the state of Paraná, Brazil. The experiment was conducted in an experimental area located in Campo Mourão - PR, during the year 2013, using the BRS Pardela cultivar. The treatments consisted of periods of coexistence and weed control in wheat. Periods of coexistence and control were 0, 7, 14, 28, 35 and the whole cycle at days after crop emergence (DAE). Number of reproductive tillers per plant, spike length, number of spikelets per spike, plant height and wheat crop yield, were significantly affected by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Raphanus raphanistrum; Triticum aestivum. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200291 |
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| SILVA,A.A.P.; OLIVEIRA NETO,A.M.; GUERRA,N.; HELVIG,E.O.; MACIEL,C.D.G.. |
| ABSTRACT One of the factors that can influence soybeans yield is the interference imposed by weeds. This research has aimed to determine the critical period of weed interference on cv. INT 6100 RRTM soybeans. The experiment was conducted under field conditions at Campo Mourão County, Parana State, in the 2013/2014 harvest, using randomized blocks, arranged in a 2 x 8 factorial, with four replications. In the first factor, the coexistence (period before weed interference) and control (total period of weed interference prevention) periods were assessed. The second factor consisted of management times of weed species (0, 7, 14, 28, 35, 49, 56 and 130 days after emergence - DAE). The evaluations performed were density and shoot dry matter of the weed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coexistence; Weed control; Competition; Glycine max. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400707 |
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| KARPINSKI,R.A.K.; SILVA,A.A.P.; HELVIG,E.O.; MACIEL,C.D.G.; LUSTOSA,S.B.C.; SPADER,V.. |
| ABSTRACT: This research aimed to assess the selectivity of treatments involving the commercial formulations tank mixtures of iodosulfuron-methyl with herbicides ACCase inhibitors (fenoxaprop-p-ethyl and clethodim) and synthetic auxins (2.4-D), applied in post-emergence of wheat (Triticum aestivum) and barley (Hordeum vulgare) crops. Three experiments were conducted in the field, during the 2014 crop year. A randomized complete block design was used with 11 treatments and five replications. Treatments consisted of (g ha-1): 1) iodosulfuron-methyl (6.5), 2) fenoxaprop-p-ethyl (82.5), 3) fenoxaprop-p-ethyl + clethodim (55 + 54); 4) 2.4-D (335), 5, 6 e 7) iodosulfuron-methyl + fenoxaprop-p-ethyl (6.5 + 82.5; 6.5 + 110 and 6.5 + 165), 8) iodosulfuron-methyl +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Hordeum vulgare; Intoxication; Tank mixtures. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100226 |
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| MACIEL,C.D.G.; OLIVEIRA NETO,A.M.; GUERRA,N.; LEAL,G.B.; SILVA,A.A.P.; SOARES,C.R.B.; KARPINSKI,R.A.K.. |
| ABSTRACT Sweet sorghum culture is an alternative to sugar and ethanol production. With the aim of evaluating herbicide tank-mix selectivity associated or not to sweet sorghum seed treatment with naphthalic anhydride, two experiments with ESX5200 and EJX7C5110 hybrids were performed in red oxisol (clayey) field conditions, in the municipality of Campo Mourão, Paraná state. A randomized block design was used, with 4 x 2 factorial scheme, with four replications. The first factor represented three herbicide associations and a control sample without herbicide, and the second factor was constituted by the absence or presence of seed treatment with naphthalic anhydride (5.0 g kg-1). Herbicide treatments were tank-mixes of atrazine + S-metolachor (2,640 + 480 g ha... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Naphthalic anhydrid; Sorghum bicolor; Tank-mix; Safener. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100228 |
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| HELVIG,E.O.; PINHEIRO,K.K.G.; DRANCA,A.C.; SILVA,A.A.P.; MENDES,M.C.; MACIEL,C.D.G.. |
| ABSTRACT: The objective of this study was to determine the coexistence periods of weeds (CTWR = critical timing of weed removal) and control (CWFP = critical weed-free period) in maize crops in no-tillage and conventional systems at high altitudes in southern Brazil. To this end, four experiments were conducted in Guarapuava-Paraná during the 2016/2017 crop season using P2530™ (conventional) and P3271H™ (transgenic genetically modified for glyphosate tolerance) hybrids in no-tillage and conventional systems with crop residues of black oat (Avena strigosa). The experimental design was a randomized complete block with five repetitions. The treatments were divided into periods of CTWR and CWFP for 0, 7, 14, 28, 42, 63, and 126 days after the emergence of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Competition; Control; Productivity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100229 |
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