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| Albrecht,A.J.P.; Albrecht,L.P.; Krenchinski,F.H.; Placido,H.F.; Lorenzetti,J.B.; Victoria Filho,R.; Barroso,A.A.M.. |
| Recent studies indicate that glyphosate applied in post-emergence in RR soybean can eventually cause phytotoxic effects. However, there are many questions that need to be clarified in the scientific and technical contexts, involving the issue of RR soybeans regarding the use of glyphosate. This study has assessed the impact of the application of different doses and formulations of glyphosate in the reproductive period of RR soybean (R1 stage). For that purpose, an experiment in the field was conducted in two harvests (2011/12 and 2012/13), in which a 2 x 5 factorial design was used (formulations versus doses) totaling 10 treatments. In these two experiments the variables related to agronomic performance were: phytotoxicity (7, 14, 21 and 28 days after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Herbicide; Transgenic crops; Phytotoxicity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400020 |
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| Barroso,A.A.M.; Alves,P.L.C.A.; Yamauti,M.S.; Nepomuceno,M.P. |
| O objetivo deste estudo foi determinar os períodos críticos de interferência das plantas daninhas no feijoeiro no sistema de plantio direto, na safra de primavera. A cultura antecessora ao feijoeiro foi a de milheto, que gerou 2 t ha-1 de massa seca. Os tratamentos foram constituídos por períodos crescentes (0, 10, 17, 24, 31, 45 e 66 dias após a emergência) de convivência ou de controle das plantas daninhas. O delineamento experimental adotado foi o de blocos ao acaso, com os tratamentos dispostos no esquema fatorial 2 x 6, com quatro repetições, mais duas testemunhas: uma limpa durante todo o ciclo da cultura e outra suja, ausente de controle. A comunidade infestante foi composta por 16 espécies, sendo dez eudicotiledôneas. A espécie de maior importância... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Plantas daninhas; Competição; Amaranthus retroflexus. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000200006 |
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| Barroso,A.A.M.; Yamauti,M.S.; Nepomuceno,M.P.; Alves,P.L.C.A. |
| O objetivo deste trabalho foi avaliar a interferência causada pelo caruru-demancha (Amaranthus viridis) e amendoim-bravo (Euphorbia heterophylla), em função das densidades e distâncias, no feijoeiro (Phaseolus vulgaris) cultivar Pérola. Como recipientes, foram utilizadas caixas de cimento-amianto, com capacidade para 50 litros, preenchidas com LatossoloVermelho-Escuro. As mudas foram formadas em bandejas de 128 células preenchidas com substrato hortícola; quando as plântulas atingiram o estádio V2, foram transplantadas para as caixas, sendo as de feijoeiro numa linha central, reproduzindo a semeadura em campo, e as das plantas daninhas nas densidades de 8, 16 e 32 plantas m-2, distanciadas de 0, 12 e 24 cm das plantas de feijão e igualmente entre si. O... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Planta daninha; Competição; Phaseolus vulgaris. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000100006 |
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| Krenchinski,F.H.; Albrecht,A.J.P.; Albrecht,L.P.; Villetti,H.L.; Orso,G.; Barroso,A.A.M.; Victoria Filho,R.. |
| Light, temperature and dormancy are factors that influence the germination of seeds and are strictly linked to the emergence of weeds. The objective of this work was to assess the germination of Sorghum arundinaceum and Sorghum halepense subjected to different conditions of temperature and luminosity, as well as assessing seed dormancy breaking mechanisms. For this, two experiments were conducted, both arranged in a completely randomized design. Experiment 1 was installed in a 2 x 5 double factorial design. The first factor was the absence or presence of light for 12 hours, and the other was composed of five constant temperatures: 15, 20, 30, 40 and 45 oC. In experiment 2, the efficiency of nine treatments used for breaking dormancy of seeds was assessed.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Johnsongrass; False johnsongrass; Dormancy; Seeds. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200223 |
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| Reis,F.C.; Medina Sotomayor,J.F.; Garcia,D.B.; Barroso,A.A.M.; Albrecht,A.J.P.; Filho,R.V.. |
| The aim of this work was to analyze the effect of temperature and light intensity on trumpet flower seed germination, as well as the effect of seeding depth on its emergence. To study the influence of temperature, nine temperature intervals were evaluated, ranging from 15.0 to 40.0 ºC. A randomized block design experiment was used with five replications and 20 seeds per replication, and performed twice. To evaluate light intensity on seed germination, a randomized experimental design was used with eight replications and 25 seeds per replication. The treatments applied were: photoperiod with temperature alternation; photoperiod with constant temperature; darkness with temperature alternation; and darkness with constant temperature. The photoperiod consisted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Temperature; Light; Photoperiod; Photoblastism. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200005 |
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| Parreira,M.C.; Barroso,A.A.M.; Pereira,F.C.M.; Alves,P.L.C.A.. |
| The research objective was to determine the effects of spacing and seeding density of common bean to the period prior to weed interference (PPI) and weed period prior to economic loss (WEEPPEL). The treatments consisted of periods of coexistence between culture and the weeds, with 0 to 10, 0 to 20, 0 to 30, 0 to 40, 0 to 50, 0 to 60, 0 to 70, and 0 to 80 days and a control maintained without weeds. In addition to the periods of coexistence, there were still studies with an inter-row of 0.45 and 0.60 m, 10 and 15 plants m-1. The experimental delineation used was randomized blocks with four repetitions per treatment. The grain productivity of the culture had a reduction of 63, 50, 42 and 57% when the coexistence with the weed plants was during the entire... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Competition; PPI; WEEPPEL. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000400004 |
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