Absorption, localisation, translocation and activity of glyphosate inbarnyardgrass (Echinochloa crus-galli (L) Beauv): influence of herbicideand surfactant concentration

摘要

The influence of sub-lethal and lethal doses of glyphosate (5 mu g and 10 mu g per plant) applied to the fourth leaf of barnyardgrass (Echinochloa crus-galli) was examined over a treatment period of up to 14 days. Assessments were undertaken on plant growth, chlorophyll fluorescence, absorption and translocation of [C-14]glyphosate. Electronic autoradiography and image analysis were used to examine the distribution of [C-14]glyphosate over the duration of the study. Major sinks affecting glyphosate distribution included the emerging fifth leaf, the roots and 'shoot' (meristem area).