00868naa a2200133 a 450000100080000000500110000800800410001910000220006024501150008226000090019752004500020665000100065677300680066618349642013-10-10       1977    bl ---       0--  u    #d1 aMORRALL, R. A. A.  aA preliminary study of the influence of water potential on sclerotium germination in Sclerotinia sclerotiorum.  c1977  aSclerotia of Sclerotinia sclerotiorum (Lib.) de Bary buried in a heavy clay soil at 15 °C germinated over a range of moisture levels from 15% to 50%. A method of germinating sclerotia held at constant matric water potentials was tested. Sclerotia were placed in soil in bags of a semipermeable membrane; the bags were immersed in solutions of polyethylene glycol 20 000. Germination occurred between 0 and ?7.5 bars but not at lower potentials.  aFungo  tCanadian Journal of Botany, Ottawagv. 55, n. 1, p. 8-11, 1977.