| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000365215 |
| ISSN: | 0001-3765 |
| Authors: | Tanveer, Asif1 Nadeem, Muhammad A1 Ali, Asghar1 Tahir, Muhammad1 Zamir, Muhammad S.I1 |
| Institutions: | 1University of Agriculture, Department of Agronomy, Faisalabad. Pakistán |
| Year: | 2009 |
| Season: | Dic |
| Volumen: | 81 |
| Number: | 4 |
| Pages: | 873-880 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The carry-over effect of sub-lethal herbicides was investigated on the germination of seeds collected from surviving Chenopodium album plants, which had received 1/8, 1/8 twice, 1/8 three times, 1/4, 1/2, 1/1 doses of either pre-emergence ioxynil or post-emergence bentazone in a previous onion (Allium cepa) crop. Seeds were also collected from surviving C. album plants, which had received 1/4, 1/2, 1/1 of either pre-emergence pendimethalin, propachlor and linuron, or 1/8, 1/8 twice, 1/8 three times, 1/4, 1/2, 1/1 of post-emergence ioxynil or linuron in a previous leek (Allium porrum) crop. Seeds of surviving plants were collected and tested for germination at temperature of 5, 10, 15, 20 and 25°C. The effect of different temperatures on the total number of germinated seeds was significant. Germination was minimum at low temperatures (5°C or 10°C). Herbicides did not show any effect on germination of C. album and resulted in the same final germination percentage as seeds collected from the unsprayed control plots |
| Portuguese abstract | Avaliou-se o efeito residual de doses sub-letais de herbicidas sobre a germinação de sementes de plantas de Chenopodium album sobreviventes em uma cultura prévia de cebola (Allium cepa), que recebeu 2x, 3x, 1/4, 1/2 ou a dose recomendada de ioxynil em pré-emergência ou bentazone em pós-emergência. As sementes foram também coletadas de plantas de C. album sobreviventes de um campo de alho-porró (Allium porrum) que havia sido tratado com 1/4, 1/2 ou a dose recomendada de pendimethalin, propachlor e linuron em pré-emergência, ou ainda 2x, 3x, 1/4, 1/2 ou a dose recomendada de ioxynil ou linuron em pós-emergência. As sementes destas plantas sobreviventes foram coletadas e testadas quanto à germinação a temperaturas de 5°C, 10°C, 15°C, 20°C e 25°C. Verificou-se que o efeito das temperaturas na germinação destas sementes foi significativa. A germinação foi mínima a baixas temperaturas (5°C e 10°C). Os herbicidas não causaram nenhum efeito na germinação das sementes de C. album tendo resultado no mesmo nível daquelas das plantas controles de culturas não pulverizadas |
| Disciplines: | Agrociencias |
| Keyword: | Fitotecnia, Herbicidas, Bioensayos, Germinación, Chenopodium album, Allium cepa, Allium porrum |
| Keyword: | Agricultural sciences, Crop husbandry, Herbicides, Bioassays, Germination, Chenopodium album, Allium cepa, Allium porrum |
| Full text: | Texto completo (Ver HTML) |
