RT Journal Article
T1 Can Control of Glyphosate Susceptible and Resistant Conyza sumatrensis Populations Be Dependent on the Herbicide Formulation or Adjuvants?
A1 Palma Bautista, Candelario
A1 Tataridas, Alexandros
A1 Kanatas, Panagiotis
A1 Bastida Milián, Fernando
AB In this work, we studied the effect of three glyphosate formulations (isopropylamine,ammonium and potassium salts) and two non-ionic adjuvants on the resistance response of tworesistant (R1, R2) and one susceptible population of the highly invasive Asteraceae, Conyza sumatrensis,from Southern France vineyards. Only in R1, an amino acid substitution (Pro106Thr) was found inthe enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). The two adjuvants, in a similarfashion, significantly reduced GR50 values for every population and glyphosate formulation.Without adjuvants, glyphosate as potassium salt was the only formulation able to significantlyreduce the GR50 values of every population. For every population, the two adjuvants improved,indistinguishably, leaf retention of the herbicidal solution and the potassium salt formulation ledto the highest retention, both with and without the adjuvant added. Uptake responses paralleledthose of retention and adjuvant addition was more effective in increasing foliar uptake of the lowerperforming formulations (isopropylamine and ammonium salts). The allocation pattern of glyphosateamong plant compartments was only dependent on population, with R2 retaining most glyphosate inthe treated leaf, clearly suggesting the occurrence of a Non-Target Site Resistance (NTSR) mechanism.Results indicate that control of weed populations possessing NTSR mechanisms of resistance toglyphosate may be improved through adequate selection of formulation and adjuvant use.
PB MDPI
SN 2073-4395
YR 2020
FD 2020-10
LK http://hdl.handle.net/10272/19105
UL http://hdl.handle.net/10272/19105
LA eng
NO Palma Bautista, C., Tataridas, A., Kanatas, P. ... Bastida Milián, F. ( 2020 ). Can Control of Glyphosate Susceptible and Resistant Conyza sumatrensis Populations Be Dependent on the Herbicide Formulation or Adjuvants?. AGRONOMY  Volumen: 10 Número: 10 Número de artículo: 1599. DOI: 10.3390/agronomy10101599
DS Repositorio Institucional de la Universidad de Huelva
RD 15 jul 2026