redução da infestação de papuã (urochloa plantaginea) no feijoeiro comum através do uso de herbicidas residuais reduction of alexander grass (urochloa plantaginea) infestation with aplication of residual herbicides on common bean

Clicks: 295
ID: 233845
2012
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Abstract
O objetivo deste trabalho foi avaliar os efeitos de herbicidas residuais, aplicados na condição de pré-emergência da cultura, na redução da infestação de papuã (Urochloa plantaginea) no feijoeiro comum. Realizaram-se dois experimentos em campo, em Eldorado do Sul, RS, sendo um conduzido com o cultivar UFT - 06 (grupo Carioca) e o outro com o cultivar IPR Graúna (grupo Preto). Os experimentos foram instalados em blocos casualizados, com quatro repetições, testando-se quatro herbicidas residuais em duas doses, mais testemunha sem controle da infestante. Esses herbicidas, com as respectivas doses (kg i.a. ha-1), foram pendimethalin e trifluralin (1,2 e 1,4) e dimethenamid e S-metolachlor (1,4 e 1,6). O controle e a massa seca da parte aérea do papuã foram avaliados aos 20 e 40 dias após a emergência da cultura, o que compreende o período crítico de interferência das infestantes. Os quatro herbicidas testados reduziram a infestação do papuã no feijoeiro comum em relação à testemunha, sendo os melhores níveis de eficácia de controle obtidos com trifluralin. Para se obter sucesso na redução da infestação do papuã com herbicidas residuais, devem-se combinar outras ações de manejo em pós-emergência da cultura do feijão comum.
This work evaluated the effects of residual herbicides, applied in crop pre-emergence, on the reduction of Alexander grass (Urochloa plantaginea) infestation in the common bean. Two field experiments were conducted at Eldorado do Sul, RS/Brazil: one using the bean cultivar UFT-06 (Red group), and the other using IPR Graúna (Black group). The experiments were arranged in a randomized block design, with four replicates, and the treatments consisted of four herbicides, at two rates (kg i.a. ha-1), as follows: pendimethalin and trifluralin (1.2 and 1.4), and s metolachlor and dimethenamid (1.4 and 1.6). Control and shoot mass of Alexander grass were assessed at 20 and 40 days after crop emergence, which includes the critical period of weed interference. All residual herbicides reduced Alexander grass infestation during this period, and the best weed control was obtained with trifluralin herbicide in both experiments. To successfully reduce Alexander grass infestation with residual herbicides, weed management actions must be taken during common bean post-emergence.
Reference Key
kalsing2012plantareduo Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;A. Kalsing;R.A. Vidal
Journal anti-cancer agents in medicinal chemistry
Year 2012
DOI
10.1590/S0100-83582012000300013
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000300013
Keywords
bean weeds chemical control

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