Experiment 1 was carried out using 4$1-day-old and
Experiment 2, 14$1-day-old F. candida, obtained from
synchronous cultures according to ISO (1994) and Wiles
and Krogh (1998) in four, 6-cm height]17-cm
length]11.5-cm width, clear plastic boxes. Collembola
were cultured on a moist substrate of 8:1 plaster of Paris:
graphite powder by weight (depth approx. 0.5 cm) under
a light: dark regime of 16:8 h. After 3 days, adults were
removed and cultures maintained at 203C, to allow eggs laid
by the females to hatch.