Bioassay for Determining Sensitivity to Sulfosulfuron on Seven Plant Species |
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Authors: | I SANTÍN-MONTANYÁ J L ALONSO-PRADOS M VILLARROYA J M GARCÍA-BAUDÍN |
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Institution: | Departamento de Protección Vegetal , Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA) , Madrid, Spain |
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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-ethylsulfonylimidazo1,2-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). |
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Keywords: | Hydroponic bioassay Sensitivity Sulfosulfuron Dose-response Phytotoxicity |
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