Selectivity of herbicides in pre- and post- transplantation in lettuce culture

• Autor(a) principal: Giordani, Glaucia Maria Rojas Cabrini
• Data de Publicação: 2008
• Outros Autores: Santos, Humberto Silva, Scapim, Carlos Alberto, Constantin, Jamil, Callegari, Osni
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Agronomy (Online)
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2862
• topic: Lactuca sativa L.; alface; herbicidas; seletividade; 5.00.00.00-4 Ciências Agrárias

Evaluation of herbicide selectivity on transplanted lettuce cv. Elisa was undertaken in Maringá PR Brazil, from April through June, 1998. Experiment consisted of randomized blocks in a split plots scheme with four replications. The plots (6.3m x 1.2m) were divided into three subplots: one central subplot received herbicide treatments and the two lateral subplots were controls. Herbicides applied to pre-transplanted lettuce and evaluated were metolachlor, oxadiazon, oxyfluorfen, pendimethalin, thiobencarb and trifluralin; phenoxaprop-p-ethyl + clethodin, fluazifop-p-butyl, ammonium gluphosinate and imazethapyr were applied to post-transplantation culture. The experimental area was kept free from weeds during the whole period. Four to five weekly visual evaluations of phytotoxicity were performed for pre- and post- transplantation treatments. Marketable lettuce was evaluated too. The above two characteristics taken as a basis, treatments with thiobencarb, trifluralin, phenoxaprop-p-ethyl + clethodin, fluazifop-p-butyl and ammonium gluphosinate were defined as selective in the doses and the application modes delimited in the assay