Data/hora: 02/06/2024 11:06:23

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 02/05/1994
Data da última atualização: | 02/05/1994
Autoria: | HUNTER, J. H.; HSIAO, A. I; MCINTYRE, G. I.
Título: | Effect of nitrogen on the glyphosate-induced inhibition of rhizome bud growth in quackgrass (Elytrigia repens)
Ano de publicação: | 1993
Fonte/Imprenta: | Weed science v.41,p.426-433,1993.
Páginas: | p.426-433.
Idioma: | Inglês
Conteúdo: | In experiments conduced under controlled conditions, glyphosate-induced inhibition of rhizome bud growth in quackgrass was reduced by increasing the nitrogen (N) concentration in the nutrient solution from 10.5 to 210 mg L-1 either 2 or 4 before foliar application of the herbicide, and for 7 d after the herbicide treatment. The additional N reduced the glyphosate- induced inhibition of rhizome growth on the infact plant at the lowest glyphosate dosage (2.8 ug per plant) but had no significant effect at higher dosages. Both the 2- and 4-d high N treatments significantly increased the length, dry weight, and water content of the lateral buds by the time the herbicide was applied. They also increased bud growth on the glyphosate-treated plants during the 7d following the herbicide application and promoted release of the buds from inhibition during a subsequent bioassay of treir regenerative growth on excised, single-node rhizome segments. These effects of N supply interacted significantly with glyphosate dosage, bud position on the rhizome, and duration of incubation. It is postulated that bud growth response to incrased N supply may reduce the inhibiting effect of the herbicide by diluting the glyphosate concentration in the bud, or that the additional N may counteract the toxic action of glyphosate on amino acid metabolism or protein synthesis. Nomenclature: Gliphosate, N-(phosphonomethyl) glycine; quackgrass, Elitrigia repends (L.) Nevski #3 AGRRE.
Palavras-Chave: | Controle; Planta daninha.
Thesagro: | Crescimento.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (15478-1) - ADC - SP - -- - S2535 -  - S2535 - DIS