Biometrical Letters Vol. 56(1), 2019, pp. 105-116
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EFFECTIVE DOSE OF IONIC LIQUIDS WITH GLYPHOSATE
Katarzyna Marcinkowska1, Agnieszka Łacka2 1Department of Weed Science and Plant Protection Techniques, Institute of Plant Protection – National Research Institute, Władysława Węgorka 20, 60-318 Poznań, Poland, e-mail: k.marcinkowska@iorpib.poznan.pl 2Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, Wojska Polskiego 28, 60-637 Poznań, Poland |
The effective dose of six herbicidal ionic liquids containing glyphosate [N-(phosphonomethyl)glycine] was investigated. Varied biological activity of the tested compounds was observed depending on the type of cation and targeted plant species. In the case of common lambsquarters, the lowest effective dose was obtained for compounds containing didecyldimethylammonium and di(hydrogenated tallow)dimethylammonium cations. In the case of white mustard, the lowest ED50 and ED90 values were obtained for the reference compound, which contained glyphosate isopropylamine salt. These parameters were determined using dose efficiency curves based on log-logistic models with three or four parameters. The study indicates that ionic liquids with glyphosate may be used as a new form of this herbicide in the future.
dose-response, herbicidal ionic liquids, glyphosate, weed control, efficacy
