Absorption and translocation of dialkyl dithiolanylidenemalonates by rice plants from their aqueous solution

Absorption and translocation of dialkyl 1, 3-dithiolan-2-ylidenemalonates by rice plants were determined by applying their aqueous solution to the root system or to the root and lower stem. Rice plants seemed to translocate the compounds through the transpiration stream via the root system and through the capillary system on the stem. The latter translocation was related to the hydrophobicity of the compounds, as was the former but inversely. Adsorption by soil did not affect the availability of the compounds to the plants except the most hydrophobic compound. Charcoal addition (0.17%w/w) to the soil reduced all the compound concentrations in water and their resulting availability to the plants was also reduced.