THE POSSIBLE TRANSLOCATION OR SUBLIMATION OF DDE IN ALFALFA.

Three alfalfa varieties (Medicaao sativa L.) were grown for one year on soil dosed with four different concentrations of DDE. The alfalfa was crown in pots with lids to monitor possible translocation or sublimation of the pesticide in the plant. Analysis was done by electron capture gasliquid chromatography (E.C.G.L.C.) using a tritium foil. The results showed that little translocation appeared to have alien place, but sublimation of the DDE had occurred at a significant rate.