| Journal: | Planta daninha |
| Database: | PERIÓDICA |
| System number: | 000250842 |
| ISSN: | 0100-8358 |
| Authors: | Lopez-Ovejero, R.F1 Penckowski, L.H2 Podolan, M.J Carvalho, S.J.P Christoffoleti, P.J |
| Institutions: | 1Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil 2Fundacao ABC, Castro, Parana. Brasil |
| Year: | 2006 |
| Volumen: | 2 |
| Number: | 2 |
| Pages: | 407-414 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The objective of this work was to evaluate the efficacy of aplying ACCase inhibiting herbicides on a population of the weed large crabgrass (Digitaria ciliaris) with a history of control failure, as well as to propose alternative herbicides to be sprayed in pre- and post-emergence on the soybean crop. Thus, two field experiments were carried out in Palmeira (PR), Brazil, during the growing season 2003/2004. The first experiment evaluated the efficacy of the ACCase inhibiting herbicides (g ha-1): sethoxydim (230); clethodim (108); butroxydim (75); tepraloxydim (100); fluazifop-p-butyl (187.5); haloxyfop-r (60); propaquizafop (125); cyhalofop-butyl (225); fenoxaprop-p-ethyl + clethodim (50 + 50) and weeded check. The second experiment consisted of treatments using herbicides with alternative mechanism of action (g ha-1): trifluralina (2,700); clomazone (1,000); S-metolachlor (1,920); sulfentrazone (600); trifluralina + sulfentrazone (2,100 + 400); clomazone + sulfentrazone (600 + 400); S-metolachlor + sulfentrazone (768 + 400) in preemergence and a weeded check; all herbicides were applied with or without imazethapyr (100) application in post-emergence, sprayed when the weeds were at the stage of 2 to 4 leaves. The results suggested that the population studied is resistant to ACCase inhibiting herbicides; the best results of control efficacy with the ACCase inhibiting herbicides were obtained with tepraloxydim, clethodim and butroxydim; the treatments with sulfentrazone, alone or in mixture; the treatments with trifluralin, clomazone and S-metoalachlor, with imazethapyr complementation and imazethapyr alone were effective in controlling the resistant biotype of Digitaria ciliaris, showing that these treatments are management alternatives for the control of weed resistant populations |
| Portuguese abstract | de Digitaria ciliaris, permitindo assim a recomendação destes tratamentos como alternativas de manejo de populações resistentes da planta daninha |
| Disciplines: | Agrociencias |
| Keyword: | Leguminosas, Malezas, Herbicidas, Resistencia, Manejo, Digitaria ciliaris |
| Keyword: | Agricultural sciences, Legumes, Weeds, Herbicides, Resistance, Management, Digitaria ciliaris |
| Full text: | Texto completo (Ver PDF) |
