Data/hora: 15/05/2024 01:40:07

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 24/02/2000
Data da última atualização: | 24/02/2000
Autoria: | PEREIRA, R. C.
Título: | Absorption and translocation of Glyphosate in Panicum virgatum and Panicum obtusum.
Ano de publicação: | 1975
Fonte/Imprenta: | [West Lafaiette]: Purdue University, 1975.
Páginas: | 49p.
Idioma: | Inglês
Notas: | Msc. Dissertation.
Conteúdo: | Speed of absorption and translocation of glyphosate, N- (phosphonomethyl)-glycine, in switchgrass (Panicum virgatum) and vine mesquite (P. obtusum) as well as the influence of some enviromental factors on absorption and translocation were investigated under greenhouse and growth chamber conditions. Washing and clipping technique were used to study absorption and translocation, respectively. At  1,5 kg/ha (active ingredient) enough glyphosate was absorbed during a 1,5 hour period to kill 62% of the switchgrass and 85% of the vine mesquite. At 3.0 kg/ha 95% of both species were killed. Glyphosate movement was fast in both species. By 8 hours (switchgrass) and 16 hours (vine mesquite) after treatment, enough glyphosate at 1.5 kg/ha had moved out of the foliage to cause more than 50% regrowth inhibition. At 3.0 kg/ha 50% regrowth inhibition occurred in less than 2 and 4 hours for switchgrass and vine mesquite, respectively. Dark periods of 48 hours before and/or 1 hour after treatment had no influence on the absorption of glyphosate. Photoperiods of 8, 12 and 16 hours, and temperatures of 15.0, 22.5 and 30.0ºC, with predisposition times of 72 and 48 hours respectively, also did not influence absorption. Translocation, however, was effected by temperature. It was greater at 30.0ºC than at 22.5ºC and was least at 15.0ºC. Less translocation occurred in plants placed in the dark 48 hours before and 24 hours after treatment. Translocation was not affected by the different photoperiods.
Palavras-Chave: | Panicum obtusum; Planta daninha.
Thesagro: | Absorção; Herbicida; Translocação.
Thesaurus Nal: | absorption; glyphosate; herbicides; Panicum virgatum; weeds.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (16240-1) - ADC - TS - -- - T012/75 - PER - T012/75 - DIS