Radioindication method for determining the site of uptake of herbicide acetochlor in maize

Effect of acetochlor placement on the uptake and distribution of carbonyl-14C labelled compound in maize (Zea Mays L.) was followed in time-course experiments using charcoal barrier to separate the roots from shoot in sand culture. The results confirm that the main entrance of acetochlor to maize is through the roots but the uptake by coleoptile also plays an important role in the selectivity of acetochlor. Phytotoxic symptoms caused by acetochlor show good correlation with the site of uptake. (author)