Selection of bioindicator species for the herbicide ethoxysulfuron

• Autor(a) principal: Oliveira, Thiago Lucas de
• Data de Publicação: 2018
• Outros Autores: Senoski, Marcelo de Paula, Assis, Ana Caroline de Lourdes Pereira, Miranda, Valesca Pinheiro de, Melo, Christiane Augusta Diniz, Reis, Marcelo Rodrigues dos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2613
• topic: Bioassay; Sulphonylurea; Test plants; Bioensaio; Sulfonilureia; Plantas teste

The selection of bioindicator species for ethoxysulfuron can enable the study of the behavior of this herbicide in the soil through the bioassay technique. Thus, this study aimed to select species with potential for use as bioindicators of the presence of this herbicide in the soil. A completely randomized design with four replications was used in which four plant species (sorghum, cucumber, beet and tomato) were cultivated in soil submitted to the application of six doses of ethoxysulfuron (0, 18.75, 37.5, 75, 112.5 and 150 g ha-1). Phytotoxicity, plant height (PH), shoot dry matter (SDM), root dry matter (RDM) and total dry matter (TDM) were evaluated. Different levels of tolerance of the species to ethoxysulfuron were observed: the increased doses of ethoxysulfuron reduced PH, SDM, RDM and TDM, as well as increased phytotoxicity for cucumber, beet and tomato. Sorghum showed low sensitivity to the herbicide. The highest doses inhibited the growth in height and the accumulation of dry matter of cucumber. Beet behaved as an extremely sensitive species, with a reduction of 100% in PH and dry matter in the second lowest dose (37.5 g ha-1). Among the evaluated species, the cucumber has greater potential for use as bioindicator in studies with ethoxysulfuron.