new concept for controlling parasitic weeds is described. By decomposing germination stimulants prior
to action no germination of seeds can take place anymore. Ethanol fractions of the strigolactone (SL)
analogues viz., the standard synthetic analogues GR 24 and Nijmegen-1, and analogues derived from
tetralone and coumarine, were added to an aqueous buffer with a pH ranging from 6 to 8 and the half
lifes (t1/2) of the hydrolysis were measured.