title: Bioassay for determining sensitivity to sulfosulfuron on seven plant species.
abstract: This study presents a bioassay procedure, based on the root and shoot growth parameters, for the determination of the herbicide sulfosulfuron (1-(4,6 dimethoxypyrimidin-2-yl)-3-(2-ethylsulfonylimidazo[1,2-a]pyridin-3-ylsulfonil)urea) sensitivity on seven vegetal species. Plant response to sulfosulfuron was calculated with the equations fitted to the root growth data as a function of the logarithm of the herbicide concentration by non-linear regression and was used to calculate the doses for 10, 30 and 50% inhibition of root growth (EC10, EC30 and EC50). The results indicate that the phytotoxic effect of sulfosulfuron in all the species assayed followed the order: flax > maize > onion > vetch > lepidium sativum > tomato > barley. These species showed phytotoxicity at low levels of sulfosulfuron and flax appeared to be the most susceptible species to sulfosulfuron (0.001 mg/L).
authors.affiliation: Departamento de Protección Vegetal, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Madrid, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Santín-Montanyá
authors.forename: J L
authors.initials: JL
authors.lastname: Alonso-Prados
authors.forename: M
authors.initials: M
authors.lastname: Villarroya
authors.forename: J M
authors.initials: JM
authors.lastname: García-Baudín
mesh_terms: D001681:Biological Assay; D004305:Dose-Response Relationship, Drug; D019597:Flax / Q000187:drug effects / Q000254:growth & development; D006540:Herbicides / Q000633:toxicity*; D001467:Hordeum / Q000187:drug effects / Q000254:growth & development; D031220:Lepidium sativum / Q000187:drug effects / Q000254:growth & development; D018551:Solanum lycopersicum / Q000187:drug effects / Q000254:growth & development; D019697:Onions / Q000187:drug effects / Q000254:growth & development; D063245:Plant Development; D010944:Plants / Q000187:drug effects*; D011743:Pyrimidines / Q000633:toxicity*; D012995:Solubility; D013045:Species Specificity; D013449:Sulfonamides / Q000633:toxicity*; D031306:Vicia / Q000187:drug effects / Q000254:growth & development; D003313:Zea mays / Q000187:drug effects / Q000254:growth & development
chemical_list: D006540:Herbicides; D011743:Pyrimidines; D013449:Sulfonamides; C439268:sulfosulfuron