| Journal: | Planta daninha |
| Database: | PERIÓDICA |
| System number: | 000333102 |
| ISSN: | 0100-8358 |
| Authors: | Tuffi Santos, L.D1 Duarte, W.M Tiburcio, R.A.S Ferreira, F.A1 Ferreira, L.R1 Machado, A.F.L1 |
| Institutions: | 1Universidade Federal de Vicosa, Departamento de Fitotecnia, Vicosa, Minas Gerais. Brasil |
| Year: | 2006 |
| Volumen: | 24 |
| Number: | 3 |
| Pages: | 521-526 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Besides glyphosate, which is widely utilized, other herbicides such as triclopyr and carfentrazone-ethyl, have a potential use in eucalypt plantations. However, the non-selective nature of these herbicides may lead to plant intoxication due to leaf contact during application. This work aims to evaluate the effects of some herbicides drift on Eucalyptus urophylla, simulated by applying the following subdoses: 0, 43.2, 86.4 and 172.8 g ha-1 of glyphosate; 14.4, 28.8 and 57.6 g ha-1 of triclopyr; 0.84, 1.68 and 3.36 g ha-1 of carfentrazone-ethyl; and the following mixtures: 43.2 g ha-1 of glyphosate + 14.4 g ha-1 of triclopyr; 86.4 g ha-1 of glyphosate + 28.6 g ha1 of triclopyr; 43.2 g ha-1 of glyphosate + 1.68 g ha-1 of carfentrazone-ethyl; and 86.4 g ha1 of glyphosate + 3.36 g ha-1 of carfentrazone-ethyl. The seedlings, about 50 cm high, were applied the herbicides in such a way that their superior third was not reached 45 days after transference. Glyphosate drift caused the most damage to the plant, followed by carfentrazone-ethyl and triclopyr, respectively. Eucalypt plants exposed to a subdose of 172.8 g ha-1 of glyphosate and to glyphosate + carfentrazone-ethyl mixtures, had the highest percentage of intoxication and the lowest growth during the evaluation periods. The plants exposed to triclopyr drift presenting 56.25 and 15.10% of intoxication at 15 and 30 days after application, respectively, were recovered, indicating a lesser triclopyr drift risk, compared with the other herbicides and mixtures studied |
| Portuguese abstract | Além do glyphosate, amplamente usado, outros herbicidas, como o triclopyr e o carfentrazone-ethyl, apresentam potencial de uso na eucaliptocultura. Entretanto, a nãoseletividade destes herbicidas ao eucalipto pode levar à intoxicação da cultura, caso haja contato das folhas com a calda aplicada. Objetivou-se avaliar os efeitos da deriva de alguns herbicidas em plantas de Eucalyptus urophylla, simulada por meio de subdoses: 0, 43,2, 86,4 e 172,8 g ha-1 de glyphosate; 14,4, 28,8 e 57,6 g ha-1 de triclopyr; 0,84, 1,68 e 3,36 g ha-1 de carfentrazone-ethyl; e das misturas: 43,2 g ha-1 de glyphosate + 14,4 g ha-1 de triclopyr; 86,4 g ha1 de glyphosate + 28,6 g ha-1 de triclopyr; 43,2 g ha-1 de glyphosate + 1,68 g ha-1 de carfentrazone-ethyl; 86,4 g ha-1 de glyphosate + 3,36 g ha-1 de carfentrazone-ethyl. As mudas de eucalipto com aproximadamente 50 cm de altura receberam a aplicação dos herbicidas de modo a não atingir o terço superior das plantas, 45 dias após o transplantio. Entre os tratamentos, a deriva de glyphosate mostrou-se mais danosa ao eucalipto, seguida de carfentrazone-ethyl e triclopyr. Plantas de eucalipto expostas à subdose de 172,8 g ha-1 de glyphosate e às misturas glyphosate + carfentrazone-ethyl tiveram maior porcentagem de intoxicação e menor crescimento aos 15, 30 e 45 dias após aplicação (DAA). Houve recuperação das plantas expostas à deriva do triclopyr, que apresentaram 56,25 e 15,10% de intoxicação aos 15 e 30 DAA, respectivamente, indicando menor risco da deriva do triclopyr em comparação aos demais herbicidas e misturas estudados |
| Disciplines: | Agrociencias, Biología |
| Keyword: | Malezas, Angiospermas, Herbicidas, Fitotoxicidad, Carfentrazone, Glifosato, Triclopyr, Métodos de aplicación, Eucalyptus urophylla |
| Keyword: | Agricultural sciences, Biology, Weeds, Angiosperms, Herbicides, Phytotoxicity, Carfentrazone, Glyphosate, Triclopyr, Application methods, Eucalyptus urophylla |
| Full text: | Texto completo (Ver HTML) |
