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Tolerance of castor bean to trifluralin herbicide in soils of different textures/Tolerancia da mamoneira ao herbicida trifluralin em solos com diferentes texturas

Revista brasileira de engenharia agrícola e ambiental, 2013-12, Vol.17 (12), p.1333 [Peer Reviewed Journal]

COPYRIGHT 2013 ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior ;ISSN: 1415-4366 ;EISSN: 1807-1929

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  • Title:
    Tolerance of castor bean to trifluralin herbicide in soils of different textures/Tolerancia da mamoneira ao herbicida trifluralin em solos com diferentes texturas
  • Author: Medeiros, Katty A.A. de L ; Sofiatti, Valdinei ; Silva, Humberto ; Zonta, Joao H ; Costa, Augusto G.F ; Silva, Joan B
  • Subjects: Herbicides
  • Is Part Of: Revista brasileira de engenharia agrícola e ambiental, 2013-12, Vol.17 (12), p.1333
  • Description: The scarcity of registered herbicides for cultivation of castor beans is still a limiting factor for its expansion. Thus, the aim of this study was to evaluate the tolerance of castor bean to trifluralin herbicide in soils of different textures. The experiment was conducted in a greenhouse in a completely randomized design with five replications in a factorial with 8 doses of the trifluralin herbicide (0; 187.5; 375; 750; 1.500; 3.000; 6.000 and 12.000 g [ha.sup.-1] i.a.) applied at pre-emergence and four types of substrates (washed sand; sandy loam; sandy clay loam; and clay loam soil). At 28 days after sowing, the variables plant height, leaf area, shoot dry weight, volume and dry mass of roots were measured. It was concluded that the tolerance of castor bean to trifluralin herbicide is influenced by chemical and physical characteristics of soil. In sandy and sandy loam soils, doses of trifluralin below those commonly used for weed control are sufficient to cause the decrease in the growth of castor bean plants. Key words: weed, selectivity, Ricinus communis A escassez de herbicidas registrados para a cultura da mamoneira ainda e fator limitante para sua expansao. Objetivou-se entao, com este trabalho, avaliar a tolerancia da mamoneira ao herbicida trifluralin em solos com diferentes texturas. O experimento foi conduzido em casa de vegetacao, em delineamento inteiramente casualizado com cinco repeticoes, em esquema fatorial com 8 doses do herbicida trifluralin aplicado em pre-emergencia (0; 187,5; 375; 750; 1.500; 3.000; 6.000 e 12.000 g [ha.sup.-1] i.a.) e quatro tipos de substrato (areia lavada; franco-arenoso; franco argiloso-arenoso e franco-argiloso). Aos 28 dias apos a semeadura foram determinadas as variaveis: altura de plantas, area foliar, massa seca da parte aerea, volume e massa seca do sistema radicular. Concluiu-se que a dose do herbicida trifluralin tolerada pela mamoneira e influenciada pelas caracteristicas quimicas e fisicas do solo. Em solos de textura arenosa e franco-arenosa doses do herbicida trifluralin abaixo daquelas comumente utilizadas para controle de plantas daninhas, sao suficientes para ocasionar reducao no crescimento das plantas de mamoneira. Palavras-chave: planta daninha, seletividade, Ricinus communis
  • Publisher: ATECEL--Associacao Tecnico Cientifica Ernesto Luiz de Oliveira Junior
  • Language: Spanish
  • Identifier: ISSN: 1415-4366
    EISSN: 1807-1929
  • Source: Alma/SFX Local Collection
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