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Data/hora: 13/06/2024 08:00:21

Plant Growth Responses of Apple and Pear Trees to Doses of Glyphosate
Provedor de dados: 87
Autores: CARVALHO,L.B.; DUKE,S.O.; MESSA,J.R.; COSTA,F.R.; BIANCO,S.
ABSTRACT Glyphosate is commonly used for intra-row weed management in perennial plantations, where unintended crop exposure to this herbicide can cause growth reduction. The objective of this research was to analyze the initial plant growth behavior of young apple and pear plants exposed to glyphosate. Glyphosate was sprayed on 2-year-old 'Gala' apple and 'Abbè Fetel' pear plants at doses from 18 to 720 g per hectare of acid equivalent (a.e.). The plant height of neither species was not significantly reduced (less than 1%) by any glyphosate dose at 240 days after spraying, whereas the stem diameter and the dry mass of stem and leaves were reduced by 720 g a.e. ha-1. The glyphosate dose required to reduce the aboveground dry mass by 50% was 162 and 148 g...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: N-phosphonomethyl-glycine; Malus domestica; Pyrus communis; Spray drift.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400815

Atrazine Reduces the Critical Period of Weed Interference on Narrow Row Corn
Provedor de dados: 87
Autores: PADILHA,M.; BARROSO,A.A.M.; CARVALHO,L.B.; COSTA,F.R.; BIANCO,S.
ABSTRACT The objective was to determine whether a change occurs in the critical period of weed interference prevention in narrow row corn with the use of atrazine and whether there is influence of the herbicide on crop yield components. The treatments consisted of periods without or with an initial weed control (0, 21, 35, 49, 63, 77, and 91 days after emergence), with or without application of atrazine in spikely post-emergence. The experiment was carried out in a 2 x 7 randomized blocks design (with and without weed control and seven periods with three replications). The use or not of atrazine was arranged in a split plot design. The most important weed species were Senecio brasiliensis, Urochloa plantaginea, Conyza bonariensis, Sida rhombifolia, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Period of coexistence; Zea mays.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400721

RESPOSTA DIFERENCIAL DAS CULTURAS DE MILHO RR E SOJA RR À EXPOSIÇÃO A GLYPHOSATE E ADUBAÇÃO FOSFATADA
Provedor de dados: 87
Autores: CARVALHO,L.B.; PEREIRA,M.D.C.; BORGES,P.E.V.; SILVA,F.J.; COSTA,F.R.
RESUMO A adubação fosfatada pode influenciar a resposta das culturas tolerantes ao glyphosate em razão de a absorção ativa do herbicida ser mediada por carreadores de fosfato. O objetivo desta pesquisa foi analisar características de crescimento de plantas de milho RR e soja RR quando submetidas à aplicação de glyphosate e de adubo fosfatado. O primeiro experimento foi realizado variando as doses de glyphosate (720 a 1.440 g e.a. ha-1) e de superfosfato triplo (54 a 162 kg ha-1 de P2O5) adicional à adubação recomendada. O segundo experimento foi realizado variando as mesmas doses de glyphosate e com adubação fosfatada (162 kg ha-1 de P2O5) ou não, mantendo-se a testemunha sem aplicação do herbicida e do adubo. Para ambas as culturas, altura e massa seca...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: N-(fosfonometil)glicina; Zea mays; Glycine max.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400751